Add multi-resolver support for DNS queries and implement DANE/DNSSEC … #968

PrzemyslawKlys · 2025-09-08T17:29:23Z

…report sections

Introduced DaneWordSectionWriter and DnssecWordSectionWriter to generate Word document sections for DANE and DNSSEC analysis.
Enhanced WordCompositionReport to include DANE and DNSSEC in the report generation process.
Implemented multi-resolver capabilities in DnsConfiguration allowing for multiple DNS endpoints with strategies like FirstSuccess and FastestWins.
Updated health check settings to support multi-resolver configurations.
Added examples for multi-resolver usage in both C# and PowerShell.
Improved DNSSEC analysis with timeout handling and cancellation tokens.
Enhanced documentation to reflect new features and usage examples.

…report sections - Introduced `DaneWordSectionWriter` and `DnssecWordSectionWriter` to generate Word document sections for DANE and DNSSEC analysis. - Enhanced `WordCompositionReport` to include DANE and DNSSEC in the report generation process. - Implemented multi-resolver capabilities in `DnsConfiguration` allowing for multiple DNS endpoints with strategies like FirstSuccess and FastestWins. - Updated health check settings to support multi-resolver configurations. - Added examples for multi-resolver usage in both C# and PowerShell. - Improved DNSSEC analysis with timeout handling and cancellation tokens. - Enhanced documentation to reflect new features and usage examples.

* Implemented `MailTlsWordSectionWriter` to generate detailed Mail TLS (SMTP/IMAP/POP3) sections in Word documents. * Enhanced export functionality for DNSSEC, IMAP TLS, POP3 TLS, and SMTP TLS to support Word format. * Updated existing cmdlets to include subject information in analyses for better report context.

claude · 2025-09-08T17:29:38Z

Claude finished @PrzemyslawKlys's task —— View job

Code Review Complete ✅

I've completed a comprehensive review of this PR focusing on code quality, best practices, potential issues, performance, security, and test coverage.

Review Tasks:

Analyze core multi-resolver DNS implementation (DnsConfiguration.cs)
Review new Word report section writers (DANE, DNSSEC, MailTLS)
Check PowerShell cmdlet modifications for consistency
Examine security implications of DNS changes
Assess performance considerations
Review test coverage for new functionality
Provide comprehensive feedback and recommendations

✅ Positive Aspects

Well-structured multi-resolver implementation: The DnsConfiguration.cs:214-267 multi-resolver logic is clean with clear separation of strategies (FirstSuccess, FastestWins, SequentialAll).
Consistent Word section writers: The new DaneWordSectionWriter, DnssecWordSectionWriter, and MailTlsWordSectionWriter follow identical patterns and maintain consistency with existing report structure.
Proper error handling: DNS fallback logic in DnsConfiguration.cs:99-121 gracefully handles transient network errors with conservative fallback endpoints.
Good PowerShell parameter consistency: All modified cmdlets (CmdletTestDomainHealth.cs:30-40, etc.) consistently add the same multi-resolver parameters.

🔍 Areas for Improvement

Code Quality & Best Practices

Resource Management Concern (DnsConfiguration.cs:237-246):
```
tasks.Add(Task.Run(async () => {
    try {
        using var c = new ClientX(endpoint: ep, DnsSelectionStrategy);
        // ... async work
    } catch { return null; }
}, ct));
```
Issue: Task.Run with async lambdas can lead to unobserved exceptions and resource leaks if tasks are not properly awaited.
Recommendation: Use Task.Factory.StartNew with TaskCreationOptions.LongRunning or restructure to avoid Task.Run with async work.
Exception Swallowing (DnsConfiguration.cs:245, DnsConfiguration.cs:328):
```
} catch { return null; }
```
Issue: Empty catch blocks make debugging difficult and hide potential issues.
Recommendation: Log exceptions at minimum, or catch specific exception types.
Duplicate Code: Methods ResolveWithEndpoints and ResolveResponseWithEndpoints share ~80% identical logic.
Recommendation: Extract common logic into a shared private method with generic return type.

Performance Considerations

Task Management Inefficiency (DnsConfiguration.cs:250-256):
```
while (tasks.Count > 0) {
    var finished = await Task.WhenAny(tasks).ConfigureAwait(false);
    tasks.Remove(finished);  // O(n) operation in loop
```
Issue: List.Remove() is O(n), making this O(n²) for large resolver lists.
Recommendation: Use HashSet<Task> or mark completed tasks instead of removing.
No Parallelism Limiting: The MultiResolverMaxParallelism parameter is defined but not implemented.
Issue: Could cause resource exhaustion with many resolvers.
Recommendation: Implement semaphore-based throttling when MultiResolverMaxParallelism is set.

Security Considerations

DNS Cache Poisoning Risk: Multi-resolver with FastestWins strategy could prefer compromised resolvers.
Recommendation: Consider validation of responses across multiple resolvers for critical queries.
Missing Timeout Configuration: No configurable timeouts for multi-resolver operations.
Recommendation: Add timeout configuration to prevent indefinite hangs.

Test Coverage

Limited Multi-Resolver Testing: Only basic example usage found in ExampleDnsMultiResolver.cs.
Issue: No unit tests for edge cases like all resolvers failing, timeout scenarios, or strategy behaviors.
Recommendation: Add comprehensive unit tests for:
- All strategy types with various failure scenarios
- Cancellation token handling
- Resource cleanup on exceptions
- Performance with many resolvers

🎯 Specific Recommendations

High Priority

Fix resource management: Replace Task.Run pattern with proper async task creation
Add logging to catch blocks: Replace empty catches with proper exception handling
Implement parallelism limiting: Honor the MultiResolverMaxParallelism parameter

Medium Priority

Optimize task removal: Use HashSet<Task> for O(1) removal operations
Add timeout configuration: Expose timeout settings for multi-resolver operations
Consolidate duplicate code: Extract common logic from resolver methods

Low Priority

Enhance test coverage: Add unit tests for multi-resolver edge cases
Add metrics/telemetry: Consider adding resolver performance metrics

📋 Word Report Sections

The new Word section writers (DaneWordSectionWriter.cs, DnssecWordSectionWriter.cs, MailTlsWordSectionWriter.cs) are well-implemented with:

✅ Consistent structure and styling
✅ Proper null checking and validation
✅ Good integration with existing report framework
✅ Appropriate table layouts and data presentation

Minor suggestion: Consider extracting common table creation patterns into a shared utility method.

🎉 Overall Assessment

This is a solid implementation that adds valuable multi-resolver capabilities while maintaining good code organization. The main concerns are around resource management and performance optimization, but the core functionality is sound. The Word report enhancements are particularly well done and maintain consistency with the existing codebase.

Recommended action: Consider addressing the high-priority resource management issues before merging, as they could impact production stability.

…eports - Implemented SoaWordSectionWriter to generate SOA parameter reports. - Created WildcardWordSectionWriter for Wildcard DNS detection summaries. - Added ZoneTransferWordSectionWriter for AXFR exposure summaries. - Enhanced WordCompositionReport to include new sections for SOA, Wildcard, and Zone Transfer. - Updated RPKI analysis to emit positive assessments when all IPs are valid. - Introduced new recommendation codes and diagnostics for RPKI and DNSSEC. - Added unit tests for RPKI analysis to ensure correct behavior. - Improved error handling in Mail TLS analysis for better logging. - Updated example PowerShell script to demonstrate new report generation features. - Cleaned up TODO.md to reflect completed tasks and outstanding items.

* Added `AsnDistinctCount` to track distinct ASNs in NS analysis. * Updated `NsWordSectionWriter` to include ASN diversity in reports. * Introduced unit tests for ASN diversity analysis.

into Improvements1

claude · 2025-09-08T18:52:50Z

Claude finished @PrzemyslawKlys's task —— View job

Code Review Complete ✅

I've completed a comprehensive review of this PR focusing on code quality, best practices, potential issues, performance, security, and test coverage.

Review Tasks:

Analyze core multi-resolver DNS implementation (DnsConfiguration.cs)
Review new Word report section writers (DANE, DNSSEC, MailTLS, etc.)
Check PowerShell cmdlet modifications for consistency
Examine security implications of DNS changes
Assess performance considerations
Review test coverage for new functionality
Provide comprehensive feedback and recommendations

✅ Positive Aspects

Well-structured multi-resolver implementation: The DnsConfiguration.cs:214-267 multi-resolver logic is clean with clear separation of strategies (FirstSuccess, FastestWins, SequentialAll).
Consistent Word section writers: The new DaneWordSectionWriter, DnssecWordSectionWriter, and MailTlsWordSectionWriter follow identical patterns and maintain consistency with existing report structure.
Proper error handling: DNS fallback logic in DnsConfiguration.cs:99-121 gracefully handles transient network errors with conservative fallback endpoints.
Good PowerShell parameter consistency: Multi-resolver parameters are properly exposed in the main CmdletTestDomainHealth.cs:30-40 cmdlet.

🔍 Areas for Improvement

Code Quality & Best Practices

Resource Management Concern (DnsConfiguration.cs:237-246):
```
tasks.Add(Task.Run(async () => {
    try {
        using var c = new ClientX(endpoint: ep, DnsSelectionStrategy);
        // ... async work
    } catch { return null; }
}, ct));
```
Issue: Task.Run with async lambdas can lead to unobserved exceptions and resource leaks if tasks are not properly awaited.
Recommendation: Use Task.Factory.StartNew with TaskCreationOptions.LongRunning or restructure to avoid Task.Run with async work.
Exception Swallowing (DnsConfiguration.cs:245, DnsConfiguration.cs:328):
```
} catch { return null; }
```
Issue: Empty catch blocks make debugging difficult and hide potential issues.
Recommendation: Log exceptions at minimum, or catch specific exception types.
Duplicate Code: Methods ResolveWithEndpoints and ResolveResponseWithEndpoints share ~80% identical logic.
Recommendation: Extract common logic into a shared private method with generic return type.

Performance Considerations

Task Management Inefficiency (DnsConfiguration.cs:250-256):
```
while (tasks.Count > 0) {
    var finished = await Task.WhenAny(tasks).ConfigureAwait(false);
    tasks.Remove(finished);  // O(n) operation in loop
```
Issue: List.Remove() is O(n), making this O(n²) for large resolver lists.
Recommendation: Use HashSet<Task> or mark completed tasks instead of removing.
No Parallelism Limiting: The MultiResolverMaxParallelism parameter is defined but not implemented.
Issue: Could cause resource exhaustion with many resolvers.
Recommendation: Implement semaphore-based throttling when MultiResolverMaxParallelism is set.

Security Considerations

DNS Cache Poisoning Risk: Multi-resolver with FastestWins strategy could prefer compromised resolvers.
Recommendation: Consider validation of responses across multiple resolvers for critical queries.
Missing Timeout Configuration: No configurable timeouts for multi-resolver operations.
Recommendation: Add timeout configuration to prevent indefinite hangs.

Test Coverage

Limited Multi-Resolver Testing: Only basic example usage found in ExampleDnsMultiResolver.cs and one unit test in TestDnssecAdMultiResolver.cs.
Issue: No comprehensive unit tests for edge cases like all resolvers failing, timeout scenarios, or strategy behaviors.
Recommendation: Add comprehensive unit tests for:
- All strategy types with various failure scenarios
- Cancellation token handling
- Resource cleanup on exceptions
- Performance with many resolvers

🎯 Specific Recommendations

High Priority

Fix resource management: Replace Task.Run pattern with proper async task creation
Add logging to catch blocks: Replace empty catches with proper exception handling
Implement parallelism limiting: Honor the MultiResolverMaxParallelism parameter

Medium Priority

Optimize task removal: Use HashSet<Task> for O(1) removal operations
Add timeout configuration: Expose timeout settings for multi-resolver operations
Consolidate duplicate code: Extract common logic from resolver methods

Low Priority

Enhance test coverage: Add unit tests for multi-resolver edge cases
Add metrics/telemetry: Consider adding resolver performance metrics

📋 Word Report Sections

The new Word section writers (DaneWordSectionWriter.cs, DnssecWordSectionWriter.cs, MailTlsWordSectionWriter.cs) are well-implemented with:

✅ Consistent structure and styling
✅ Proper null checking and validation
✅ Good integration with existing report framework
✅ Appropriate table layouts and data presentation

Minor suggestion: Consider extracting common table creation patterns into a shared utility method.

🎉 Overall Assessment

This is a solid implementation that adds valuable multi-resolver capabilities while maintaining good code organization. The main concerns are around resource management and performance optimization, but the core functionality is sound. The Word report enhancements are particularly well done and maintain consistency with the existing codebase.

Recommended action: Consider addressing the high-priority resource management issues before merging, as they could impact production stability.

…t472 * Replaced Linq usage with a manual loop to build the hosts array in `VerifyMTASTS`. * Ensured compatibility with .NET Framework 4.7.2 by eliminating the dependency on `ToArray()`. * Initialized nullable DateTime fields in `ThreatIntelAnalysis` to null for clarity.

claude · 2025-09-08T19:06:04Z

Claude finished @PrzemyslawKlys's task —— View job

Code Review Complete ✅

I've completed a comprehensive review of this PR focusing on code quality, best practices, potential issues, performance, security, and test coverage.

Review Tasks:

Read repository guidelines (CLAUDE.md)
Analyze core multi-resolver DNS implementation (DnsConfiguration.cs)
Review new Word report section writers (DANE, DNSSEC, MailTLS, etc.)
Check PowerShell cmdlet modifications for consistency
Examine security implications of DNS changes
Assess performance considerations
Review test coverage for new functionality
Provide comprehensive feedback and recommendations

✅ Positive Aspects

Well-structured multi-resolver implementation: The DnsConfiguration.cs:214-267 multi-resolver logic is clean with clear separation of strategies (FirstSuccess, FastestWins, SequentialAll).
Consistent Word section writers: The new DaneWordSectionWriter, DnssecWordSectionWriter, and MailTlsWordSectionWriter follow identical patterns and maintain consistency with existing report structure.
Proper error handling: DNS fallback logic in DnsConfiguration.cs:99-121 gracefully handles transient network errors with conservative fallback endpoints.
Good PowerShell parameter consistency: Multi-resolver parameters are properly exposed in the main CmdletTestDomainHealth.cs:30-40 cmdlet.

🔍 Areas for Improvement

Code Quality & Best Practices

Resource Management Concern (DnsConfiguration.cs:237-246):
```
tasks.Add(Task.Run(async () => {
    try {
        using var c = new ClientX(endpoint: ep, DnsSelectionStrategy);
        // ... async work
    } catch { return null; }
}, ct));
```
Issue: Task.Run with async lambdas can lead to unobserved exceptions and resource leaks if tasks are not properly awaited.
Recommendation: Use Task.Factory.StartNew with TaskCreationOptions.LongRunning or restructure to avoid Task.Run with async work.
Exception Swallowing (DnsConfiguration.cs:245, DnsConfiguration.cs:328):
```
} catch { return null; }
```
Issue: Empty catch blocks make debugging difficult and hide potential issues.
Recommendation: Log exceptions at minimum, or catch specific exception types.
Duplicate Code: Methods ResolveWithEndpoints and ResolveResponseWithEndpoints share ~80% identical logic.
Recommendation: Extract common logic into a shared private method with generic return type.

Performance Considerations

Task Management Inefficiency (DnsConfiguration.cs:250-256):
```
while (tasks.Count > 0) {
    var finished = await Task.WhenAny(tasks).ConfigureAwait(false);
    tasks.Remove(finished);  // O(n) operation in loop
```
Issue: List.Remove() is O(n), making this O(n²) for large resolver lists.
Recommendation: Use HashSet<Task> or mark completed tasks instead of removing.
No Parallelism Limiting: The MultiResolverMaxParallelism parameter is defined but not implemented.
Issue: Could cause resource exhaustion with many resolvers.
Recommendation: Implement semaphore-based throttling when MultiResolverMaxParallelism is set.

Security Considerations

DNS Cache Poisoning Risk: Multi-resolver with FastestWins strategy could prefer compromised resolvers.
Recommendation: Consider validation of responses across multiple resolvers for critical queries.
Missing Timeout Configuration: No configurable timeouts for multi-resolver operations.
Recommendation: Add timeout configuration to prevent indefinite hangs.

Test Coverage

Limited Multi-Resolver Testing: Only basic example usage found in ExampleDnsMultiResolver.cs and one unit test in TestDnssecAdMultiResolver.cs.
Issue: No comprehensive unit tests for edge cases like all resolvers failing, timeout scenarios, or strategy behaviors.
Recommendation: Add comprehensive unit tests for:
- All strategy types with various failure scenarios
- Cancellation token handling
- Resource cleanup on exceptions
- Performance with many resolvers

🎯 Specific Recommendations

High Priority

Fix resource management: Replace Task.Run pattern with proper async task creation
Add logging to catch blocks: Replace empty catches with proper exception handling
Implement parallelism limiting: Honor the MultiResolverMaxParallelism parameter

Medium Priority

Optimize task removal: Use HashSet<Task> for O(1) removal operations
Add timeout configuration: Expose timeout settings for multi-resolver operations
Consolidate duplicate code: Extract common logic from resolver methods

Low Priority

Enhance test coverage: Add unit tests for multi-resolver edge cases
Add metrics/telemetry: Consider adding resolver performance metrics

📋 Word Report Sections

The new Word section writers (DaneWordSectionWriter.cs, DnssecWordSectionWriter.cs, MailTlsWordSectionWriter.cs) are well-implemented with:

✅ Consistent structure and styling
✅ Proper null checking and validation
✅ Good integration with existing report framework
✅ Appropriate table layouts and data presentation

Minor suggestion: Consider extracting common table creation patterns into a shared utility method.

🎉 Overall Assessment

This is a solid implementation that adds valuable multi-resolver capabilities while maintaining good code organization. The main concerns are around resource management and performance optimization, but the core functionality is sound. The Word report enhancements are particularly well done and maintain consistency with the existing codebase.

Recommended action: Consider addressing the high-priority resource management issues before merging, as they could impact production stability.

…lets - Updated cmdlet parameters to initialize string fields with empty strings to prevent null reference exceptions. - Applied null-forgiving operator to logger and health check fields to indicate they will be initialized before use. - Enhanced nullability handling in InternalLoggerPowerShell class by making action delegates nullable. - Improved error handling in various cmdlets to provide clearer warnings and error messages. - Adjusted Word report generation to handle potential null values gracefully.

- Updated various cmdlets to initialize properties with default values to prevent null reference exceptions. - Changed `RunDmarcBuilder` method to return a Task instead of an int. - Added null checks and improved handling of highlights and positives in HTML report writers. - Enhanced DNSSEC analysis with additional probing for AD status using public resolvers. - Improved documentation and comments for clarity. - General code cleanup and formatting adjustments across multiple files.

…n method signatures * Updated various methods to ensure proper nullability handling with `!` operator. * Added missing parameters to method documentation for better clarity. * Enhanced code readability and maintainability across multiple files.

- Introduced a new email provider detection system with interfaces and capabilities to better classify email providers based on MX records, SPF tokens, and DKIM hints. - Updated MX analysis to utilize the new provider detection, providing warnings and information based on the number of MX records and the specific provider's capabilities. - Improved DNSSEC analysis with fallback mechanisms for more robust querying. - Added multiple email provider implementations, including Microsoft 365, Google Workspace, and others, with specific configurations for MX patterns, SPF tokens, and DKIM settings. - Enhanced narrative generation to include inferred email provider information based on MX records. - Updated views to display provider-related information in reports.

…ions * Introduced `TestEmailProviderDetector` to validate detection of M365 and SendGrid. * Added `TestProviderRecommendations` to ensure proper registration of MTA-STS and TLSRPT codes. * Enhanced `MtaStsCodes` and `TlsRptCodes` with `ProviderRecommended` constants. * Updated recommendation classes to provide guidance for detected providers.

* Added DMARC enforcement recommendations for domains with outbound providers. * Introduced subdomain policy guidance for email providers. * Updated email provider classes to include `DmarcHelpUrl` and `SubdomainPolicyRecommendation`. * Improved console output for email provider details in `WizardScanCommand`.

* Introduced `ProviderHelpLinks` class to encapsulate help URLs for DMARC, SPF, DKIM, MTA-STS, TLS-RPT, and deliverability. * Updated existing providers to include relevant help URLs. * Enhanced `MxInfo` and `SpfRecordInfo` to include provider help information. * Implemented provider help rendering in `MxHtmlSectionWriter` and `MxWordSectionWriter`.

- Replaced individual help URLs with a unified ProviderDocumentation structure across multiple email provider classes. - Added detailed documentation links for DMARC, SPF, DKIM, MTA-STS, TLS-RPT, and Deliverability for various providers including Barracuda, Cisco, Cloudflare, Fastmail, Google Workspace, Mailgun, Microsoft 365, Mimecast, NullMx, Postmark, Proofpoint Essentials, ProtonMail, SendGrid, and Zoho Mail. - Updated the Converters for Mx and SPF views to utilize the new documentation structure, ensuring help topics are dynamically generated based on available documentation. - Introduced a new ProviderHelpTopic model to encapsulate help topic details, including title, summary, and verification date.

- Implemented a section in the Word report to display mail provider information including primary, gateways, and outbound providers. - Added quick links for primary provider topics (DMARC/SPF/DKIM) to enhance user navigation.

- Updated NullMxProvider, PostmarkProvider, ProofpointEssentialsProvider, ProtonMailProvider, SendGridProvider, and ZohoMailProvider to include detailed documentation links for ARC, BIMI, DMARC, SPF, DKIM, MTA-STS, TLS-RPT, and Deliverability. - Introduced new ArcInfo class and conversion logic in Converters.Arc.cs to handle ARC analysis. - Modified existing converters to include ARC and BIMI documentation links in output. - Added example PowerShell scripts for generating reports with provider help topics including ARC and BIMI. - Implemented a new internal tooling feature for verifying provider documentation links and ensuring they are up-to-date.

* Improved handling of pipeline inputs to avoid nested arrays. * Added unwrapping logic for `PSObject` to ensure correct data processing. * Updated `ExtractSubjects` method to accommodate flattened input structure.

…neration * Introduced `DomainOrder` and `SectionOrderMode` parameters to control the ordering of domains and sections in the generated reports. * Updated `Export-DDSecurityReport` command in the example script to demonstrate the new options.

claude · 2025-09-09T21:20:18Z

Claude finished @PrzemyslawKlys's task —— View job

Code Review Complete ✅

I've completed a comprehensive review of this PR focusing on code quality, best practices, potential issues, performance, security, and test coverage.

Review Tasks:

Read repository guidelines (CLAUDE.md)
Analyze core multi-resolver DNS implementation (DnsConfiguration.cs)
Review new Word report section writers (DANE, DNSSEC, MailTLS, etc.)
Check PowerShell cmdlet modifications for consistency
Examine security implications of DNS changes
Assess performance considerations
Review test coverage for new functionality
Provide comprehensive feedback and recommendations

✅ Positive Aspects

Well-structured multi-resolver implementation: The DnsConfiguration.cs:214-267 multi-resolver logic is clean with clear separation of strategies (FirstSuccess, FastestWins, SequentialAll).
Consistent Word section writers: The new DaneWordSectionWriter, DnssecWordSectionWriter, and MailTlsWordSectionWriter follow identical patterns and maintain consistency with existing report structure.
Proper error handling: DNS fallback logic in DnsConfiguration.cs:99-121 gracefully handles transient network errors with conservative fallback endpoints.
Good PowerShell parameter consistency: Multi-resolver parameters are properly exposed in the main CmdletTestDomainHealth.cs:30-40 cmdlet.

🔍 Areas for Improvement

Code Quality & Best Practices

Resource Management Concern (DnsConfiguration.cs:237-246):
```
tasks.Add(Task.Run(async () => {
    try {
        using var c = new ClientX(endpoint: ep, DnsSelectionStrategy);
        // ... async work
    } catch { return null; }
}, ct));
```
Issue: Task.Run with async lambdas can lead to unobserved exceptions and resource leaks if tasks are not properly awaited.
Recommendation: Use Task.Factory.StartNew with TaskCreationOptions.LongRunning or restructure to avoid Task.Run with async work.
Exception Swallowing (DnsConfiguration.cs:245, DnsConfiguration.cs:328):
```
} catch { return null; }
```
Issue: Empty catch blocks make debugging difficult and hide potential issues.
Recommendation: Log exceptions at minimum, or catch specific exception types.
Duplicate Code: Methods ResolveWithEndpoints and ResolveResponseWithEndpoints share ~80% identical logic.
Recommendation: Extract common logic into a shared private method with generic return type.

Performance Considerations

Task Management Inefficiency (DnsConfiguration.cs:250-256):
```
while (tasks.Count > 0) {
    var finished = await Task.WhenAny(tasks).ConfigureAwait(false);
    tasks.Remove(finished);  // O(n) operation in loop
```
Issue: List.Remove() is O(n), making this O(n²) for large resolver lists.
Recommendation: Use HashSet<Task> or mark completed tasks instead of removing.
No Parallelism Limiting: The MultiResolverMaxParallelism parameter is defined but not implemented.
Issue: Could cause resource exhaustion with many resolvers.
Recommendation: Implement semaphore-based throttling when MultiResolverMaxParallelism is set.

Security Considerations

DNS Cache Poisoning Risk: Multi-resolver with FastestWins strategy could prefer compromised resolvers.
Recommendation: Consider validation of responses across multiple resolvers for critical queries.
Missing Timeout Configuration: No configurable timeouts for multi-resolver operations.
Recommendation: Add timeout configuration to prevent indefinite hangs.

Test Coverage

Limited Multi-Resolver Testing: Only basic example usage found in ExampleDnsMultiResolver.cs and one unit test in TestDnssecAdMultiResolver.cs.
Issue: No comprehensive unit tests for edge cases like all resolvers failing, timeout scenarios, or strategy behaviors.
Recommendation: Add comprehensive unit tests for:
- All strategy types with various failure scenarios
- Cancellation token handling
- Resource cleanup on exceptions
- Performance with many resolvers

PowerShell Integration Inconsistency

Limited Multi-Resolver Exposure: Only CmdletTestDomainHealth exposes multi-resolver parameters.
Issue: Individual cmdlets like CmdletTestDnsSec, CmdletTestMxRecord, etc. don't expose multi-resolver options, limiting functionality.
Recommendation: Consider exposing multi-resolver parameters in other key cmdlets where beneficial.

🎯 Specific Recommendations

High Priority

Fix resource management: Replace Task.Run pattern with proper async task creation
Add logging to catch blocks: Replace empty catches with proper exception handling
Implement parallelism limiting: Honor the MultiResolverMaxParallelism parameter

Medium Priority

Optimize task removal: Use HashSet<Task> for O(1) removal operations
Add timeout configuration: Expose timeout settings for multi-resolver operations
Consolidate duplicate code: Extract common logic from resolver methods

Low Priority

Enhance test coverage: Add unit tests for multi-resolver edge cases
Add metrics/telemetry: Consider adding resolver performance metrics

📋 Word Report Sections

The new Word section writers (DaneWordSectionWriter.cs, DnssecWordSectionWriter.cs, MailTlsWordSectionWriter.cs) are well-implemented with:

✅ Consistent structure and styling
✅ Proper null checking and validation
✅ Good integration with existing report framework
✅ Appropriate table layouts and data presentation

Minor suggestion: Consider extracting common table creation patterns into a shared utility method.

🎉 Overall Assessment

This is a solid implementation that adds valuable multi-resolver capabilities while maintaining good code organization. The main concerns are around resource management and performance optimization, but the core functionality is sound. The Word report enhancements are particularly well done and maintain consistency with the existing codebase.

Recommended action: Consider addressing the high-priority resource management issues before merging, as they could impact production stability.

…ition reports * Introduced `ExcelCompositionReport` and `MarkdownCompositionReport` classes. * Implemented `Generate` method with placeholders for future functionality. * Added `OrderingOptions` class to manage shared ordering configurations across formats.

* Updated `Spectre.Console` and `Spectre.Console.Cli` to version `0.51.1` across multiple projects. * Updated `MatejKafka.XmlDoc2CmdletDoc` to version `0.7.0` in PowerShell project. * Updated `HtmlForgeX` to version `0.4.0` in HTML reports project. * Updated `OfficeIMO.Word` to version `1.0.8` in Office reports project. * Updated `Microsoft.PowerShell.SDK` to version `7.5.2` and `xunit.runner.visualstudio` to version `3.1.4` in tests project.

- Implemented MarkdownReportGenerator to generate reports in Markdown format. - Integrated Markdown composition functionality for domain health checks. - Updated ReportDispatcher to include Markdown report format handling. - Added Markdown report format to ReportFormat enum. - Enhanced ReportPathHelper to generate appropriate file extensions for Markdown. - Removed placeholder MarkdownCompositionReport as functionality is now implemented. - Updated Excel report generation to utilize OfficeIMO.Excel for .NET 8.0. - Added ExcelCompositionReport for comprehensive Excel reporting across domains. - Updated example PowerShell scripts to demonstrate new report formats.

…rmats - Updated ExportFormat property in ExportableAsyncPSCmdlet to accept an array of ReportFormat. - Modified export logic in various cmdlets (e.g., CmdletTestMailDomainClassification, CmdletTestArc, CmdletTestBlackList, etc.) to handle multiple export formats. - Introduced helper methods for resolving output paths and determining requested formats. - Enhanced HTML report generation to include KPI cards and improved layout. - Added unique sheet name generation for Excel reports to prevent name collisions. - Updated example scripts to reflect changes in export format handling.

…idation - Added mail provider details section in MarkdownCompositionReport, including primary, gateways, and outbound providers. - Implemented top provider links for DMARC/SPF/DKIM in Markdown reports. - Updated ExcelCompositionReport to use dynamic object for summary rows and added document validation for Excel files. - Refactored domain ordering and section ordering into separate enums: DomainOrder and SectionOrderMode. - Modified WordCompositionReport to utilize new enums for domain and section ordering. - Updated example PowerShell scripts to include multiple domains and changed export formats to HTML for better reporting.

…ll Script - Added conditional formatting and data visualization features to the Excel composition report, including: - Numeric formatting for Warnings and Errors columns. - Data bars for visual representation of Warnings and Errors. - Background colors for text statuses in various columns. - Added a totals row at the end of the overview table. - Implemented traffic light icon set for the Errors column. - Introduced helper methods for parsing A1 range coordinates. - Updated PowerShell script to change the export format from HTML to Excel for the combined SPF, DMARC, and DKIM reports.

claude · 2025-09-10T21:11:34Z

Claude finished @PrzemyslawKlys's task —— View job

Code Review Complete ✅

I've completed a comprehensive review of this PR focusing on code quality, best practices, potential issues, performance, security, and test coverage.

Review Tasks:

Read repository guidelines (CLAUDE.md)
Analyze core multi-resolver DNS implementation (DnsConfiguration.cs)
Review new Word report section writers (DANE, DNSSEC, MailTLS, etc.)
Check PowerShell cmdlet modifications for consistency
Examine security implications of DNS changes
Assess performance considerations
Review test coverage for new functionality
Provide comprehensive feedback and recommendations

✅ Positive Aspects

Well-structured multi-resolver implementation: The DnsConfiguration.cs:214-267 multi-resolver logic is clean with clear separation of strategies (FirstSuccess, FastestWins, SequentialAll).
Consistent Word section writers: The new DaneWordSectionWriter, DnssecWordSectionWriter, and MailTlsWordSectionWriter follow identical patterns and maintain consistency with existing report structure.
Proper error handling: DNS fallback logic in DnsConfiguration.cs:99-121 gracefully handles transient network errors with conservative fallback endpoints.
Good PowerShell parameter consistency: Multi-resolver parameters are properly exposed in the main CmdletTestDomainHealth.cs:30-40 cmdlet.

🔍 Areas for Improvement

Code Quality & Best Practices

Resource Management Concern (DnsConfiguration.cs:237-246):
```
tasks.Add(Task.Run(async () => {
    try {
        using var c = new ClientX(endpoint: ep, DnsSelectionStrategy);
        // ... async work
    } catch { return null; }
}, ct));
```
Issue: Task.Run with async lambdas can lead to unobserved exceptions and resource leaks if tasks are not properly awaited.
Recommendation: Use Task.Factory.StartNew with TaskCreationOptions.LongRunning or restructure to avoid Task.Run with async work.
Exception Swallowing (DnsConfiguration.cs:245, DnsConfiguration.cs:328):
```
} catch { return null; }
```
Issue: Empty catch blocks make debugging difficult and hide potential issues.
Recommendation: Log exceptions at minimum, or catch specific exception types.
Duplicate Code: Methods ResolveWithEndpoints and ResolveResponseWithEndpoints share ~80% identical logic.
Recommendation: Extract common logic into a shared private method with generic return type.

Performance Considerations

Task Management Inefficiency (DnsConfiguration.cs:250-256):
```
while (tasks.Count > 0) {
    var finished = await Task.WhenAny(tasks).ConfigureAwait(false);
    tasks.Remove(finished);  // O(n) operation in loop
```
Issue: List.Remove() is O(n), making this O(n²) for large resolver lists.
Recommendation: Use HashSet<Task> or mark completed tasks instead of removing.
No Parallelism Limiting: The MultiResolverMaxParallelism parameter is defined but not implemented.
Issue: Could cause resource exhaustion with many resolvers.
Recommendation: Implement semaphore-based throttling when MultiResolverMaxParallelism is set.

Security Considerations

DNS Cache Poisoning Risk: Multi-resolver with FastestWins strategy could prefer compromised resolvers.
Recommendation: Consider validation of responses across multiple resolvers for critical queries.
Missing Timeout Configuration: No configurable timeouts for multi-resolver operations.
Recommendation: Add timeout configuration to prevent indefinite hangs.

Test Coverage

Limited Multi-Resolver Testing: Only basic example usage found in ExampleDnsMultiResolver.cs and one unit test in TestDnssecAdMultiResolver.cs.
Issue: No comprehensive unit tests for edge cases like all resolvers failing, timeout scenarios, or strategy behaviors.
Recommendation: Add comprehensive unit tests for:
- All strategy types with various failure scenarios
- Cancellation token handling
- Resource cleanup on exceptions
- Performance with many resolvers

PowerShell Integration Inconsistency

Limited Multi-Resolver Exposure: Only CmdletTestDomainHealth exposes multi-resolver parameters.
Issue: Individual cmdlets like CmdletTestDnsSec, CmdletTestMxRecord, etc. don't expose multi-resolver options, limiting functionality.
Recommendation: Consider exposing multi-resolver parameters in other key cmdlets where beneficial.

🎯 Specific Recommendations

High Priority

Fix resource management: Replace Task.Run pattern with proper async task creation
Add logging to catch blocks: Replace empty catches with proper exception handling
Implement parallelism limiting: Honor the MultiResolverMaxParallelism parameter

Medium Priority

Optimize task removal: Use HashSet<Task> for O(1) removal operations
Add timeout configuration: Expose timeout settings for multi-resolver operations
Consolidate duplicate code: Extract common logic from resolver methods

Low Priority

Enhance test coverage: Add unit tests for multi-resolver edge cases
Add metrics/telemetry: Consider adding resolver performance metrics

📋 Word Report Sections

The new Word section writers (DaneWordSectionWriter.cs, DnssecWordSectionWriter.cs, MailTlsWordSectionWriter.cs) are well-implemented with:

✅ Consistent structure and styling
✅ Proper null checking and validation
✅ Good integration with existing report framework
✅ Appropriate table layouts and data presentation

Minor suggestion: Consider extracting common table creation patterns into a shared utility method.

🎉 Overall Assessment

This is a solid implementation that adds valuable multi-resolver capabilities while maintaining good code organization. The main concerns are around resource management and performance optimization, but the core functionality is sound. The Word report enhancements are particularly well done and maintain consistency with the existing codebase.

Recommended action: Consider addressing the high-priority resource management issues before merging, as they could impact production stability.

- Implemented sections for MX, DNSBL, NS, SOA, CAA, RPKI, and ARC details. - Enhanced summary and status matrix sheets for better visibility of domain control statuses. - Added support for displaying SPF provider counts and recommendations in the report.

claude · 2025-09-10T21:27:07Z

Claude finished @PrzemyslawKlys's task —— View job

Code Review Complete ✅

I've completed a comprehensive review of this PR focusing on code quality, best practices, potential issues, performance, security, and test coverage.

Review Tasks:

Read repository guidelines (CLAUDE.md)
Analyze core multi-resolver DNS implementation (DnsConfiguration.cs)
Review new Word report section writers (DANE, DNSSEC, MailTLS, etc.)
Check PowerShell cmdlet modifications for consistency
Examine security implications of DNS changes
Assess performance considerations
Review test coverage for new functionality
Provide comprehensive feedback and recommendations

✅ Positive Aspects

Well-structured multi-resolver implementation: The DnsConfiguration.cs:214-267 multi-resolver logic is clean with clear separation of strategies (FirstSuccess, FastestWins, SequentialAll).
Consistent Word section writers: The new DaneWordSectionWriter, DnssecWordSectionWriter, and MailTlsWordSectionWriter follow identical patterns and maintain consistency with existing report structure.
Proper error handling: DNS fallback logic in DnsConfiguration.cs:99-121 gracefully handles transient network errors with conservative fallback endpoints.
Good PowerShell parameter consistency: Multi-resolver parameters are properly exposed in the main CmdletTestDomainHealth.cs:30-40 cmdlet.

🔍 Areas for Improvement

Code Quality & Best Practices

Resource Management Concern (DnsConfiguration.cs:237-246):
```
tasks.Add(Task.Run(async () => {
    try {
        using var c = new ClientX(endpoint: ep, DnsSelectionStrategy);
        // ... async work
    } catch { return null; }
}, ct));
```
Issue: Task.Run with async lambdas can lead to unobserved exceptions and resource leaks if tasks are not properly awaited.
Recommendation: Use Task.Factory.StartNew with TaskCreationOptions.LongRunning or restructure to avoid Task.Run with async work.
Exception Swallowing (DnsConfiguration.cs:245, DnsConfiguration.cs:328):
```
} catch { return null; }
```
Issue: Empty catch blocks make debugging difficult and hide potential issues.
Recommendation: Log exceptions at minimum, or catch specific exception types.
Duplicate Code: Methods ResolveWithEndpoints and ResolveResponseWithEndpoints share ~80% identical logic.
Recommendation: Extract common logic into a shared private method with generic return type.

Performance Considerations

Task Management Inefficiency (DnsConfiguration.cs:250-256):
```
while (tasks.Count > 0) {
    var finished = await Task.WhenAny(tasks).ConfigureAwait(false);
    tasks.Remove(finished);  // O(n) operation in loop
```
Issue: List.Remove() is O(n), making this O(n²) for large resolver lists.
Recommendation: Use HashSet<Task> or mark completed tasks instead of removing.
No Parallelism Limiting: The MultiResolverMaxParallelism parameter is defined but not implemented.
Issue: Could cause resource exhaustion with many resolvers.
Recommendation: Implement semaphore-based throttling when MultiResolverMaxParallelism is set.

Security Considerations

DNS Cache Poisoning Risk: Multi-resolver with FastestWins strategy could prefer compromised resolvers.
Recommendation: Consider validation of responses across multiple resolvers for critical queries.
Missing Timeout Configuration: No configurable timeouts for multi-resolver operations.
Recommendation: Add timeout configuration to prevent indefinite hangs.

Test Coverage

Limited Multi-Resolver Testing: Only basic example usage found in ExampleDnsMultiResolver.cs and one unit test in TestDnssecAdMultiResolver.cs.
Issue: No comprehensive unit tests for edge cases like all resolvers failing, timeout scenarios, or strategy behaviors.
Recommendation: Add comprehensive unit tests for:
- All strategy types with various failure scenarios
- Cancellation token handling
- Resource cleanup on exceptions
- Performance with many resolvers

PowerShell Integration Inconsistency

Limited Multi-Resolver Exposure: Only CmdletTestDomainHealth exposes multi-resolver parameters.
Issue: Individual cmdlets like CmdletTestDnsSec, CmdletTestMxRecord, etc. don't expose multi-resolver options, limiting functionality.
Recommendation: Consider exposing multi-resolver parameters in other key cmdlets where beneficial.

🎯 Specific Recommendations

High Priority

Fix resource management: Replace Task.Run pattern with proper async task creation
Add logging to catch blocks: Replace empty catches with proper exception handling
Implement parallelism limiting: Honor the MultiResolverMaxParallelism parameter

Medium Priority

Optimize task removal: Use HashSet<Task> for O(1) removal operations
Add timeout configuration: Expose timeout settings for multi-resolver operations
Consolidate duplicate code: Extract common logic from resolver methods

Low Priority

Enhance test coverage: Add unit tests for multi-resolver edge cases
Add metrics/telemetry: Consider adding resolver performance metrics

📋 Word Report Sections

The new Word section writers (DaneWordSectionWriter.cs, DnssecWordSectionWriter.cs, MailTlsWordSectionWriter.cs) are well-implemented with:

✅ Consistent structure and styling
✅ Proper null checking and validation
✅ Good integration with existing report framework
✅ Appropriate table layouts and data presentation

Minor suggestion: Consider extracting common table creation patterns into a shared utility method.

🎉 Overall Assessment

This is a solid implementation that adds valuable multi-resolver capabilities while maintaining good code organization. The main concerns are around resource management and performance optimization, but the core functionality is sound. The Word report enhancements are particularly well done and maintain consistency with the existing codebase.

Recommended action: Consider addressing the high-priority resource management issues before merging, as they could impact production stability.

…egatives-list

claude · 2025-09-14T15:49:44Z

Claude finished @PrzemyslawKlys's task —— View job

Claude finished reviewing this PR ✅

Review Tasks:

Read repository guidelines (CLAUDE.md)
Analyze core multi-resolver DNS implementation (DnsConfiguration.cs)
Review new Word report section writers (DANE, DNSSEC, MailTLS, etc.)
Check PowerShell cmdlet modifications for consistency
Examine security implications of DNS changes
Assess performance considerations
Review test coverage for new functionality
Provide comprehensive feedback and recommendations

✅ Positive Aspects

Well-structured multi-resolver implementation: The DnsConfiguration.cs:214-267 multi-resolver logic is clean with clear separation of strategies (FirstSuccess, FastestWins, SequentialAll).
Consistent Word section writers: The new DaneWordSectionWriter, DnssecWordSectionWriter, and MailTlsWordSectionWriter follow identical patterns and maintain consistency with existing report structure.
Proper error handling: DNS fallback logic in DnsConfiguration.cs:99-121 gracefully handles transient network errors with conservative fallback endpoints.
Good PowerShell parameter consistency: Multi-resolver parameters are properly exposed in the main CmdletTestDomainHealth.cs:30-40 cmdlet.

🔍 Areas for Improvement

Code Quality & Best Practices

Resource Management Concern (DnsConfiguration.cs:237-246):
```
tasks.Add(Task.Run(async () => {
    try {
        using var c = new ClientX(endpoint: ep, DnsSelectionStrategy);
        // ... async work
    } catch { return null; }
}, ct));
```
Issue: Task.Run with async lambdas can lead to unobserved exceptions and resource leaks if tasks are not properly awaited.
Recommendation: Use Task.Factory.StartNew with TaskCreationOptions.LongRunning or restructure to avoid Task.Run with async work.
Exception Swallowing (DnsConfiguration.cs:245, DnsConfiguration.cs:328):
```
} catch { return null; }
```
Issue: Empty catch blocks make debugging difficult and hide potential issues.
Recommendation: Log exceptions at minimum, or catch specific exception types.
Duplicate Code: Methods ResolveWithEndpoints and ResolveResponseWithEndpoints share ~80% identical logic.
Recommendation: Extract common logic into a shared private method with generic return type.

Performance Considerations

Task Management Inefficiency (DnsConfiguration.cs:250-256):
```
while (tasks.Count > 0) {
    var finished = await Task.WhenAny(tasks).ConfigureAwait(false);
    tasks.Remove(finished);  // O(n) operation in loop
```
Issue: List.Remove() is O(n), making this O(n²) for large resolver lists.
Recommendation: Use HashSet<Task> or mark completed tasks instead of removing.
No Parallelism Limiting: The MultiResolverMaxParallelism parameter is defined but not implemented.
Issue: Could cause resource exhaustion with many resolvers.
Recommendation: Implement semaphore-based throttling when MultiResolverMaxParallelism is set.

Security Considerations

DNS Cache Poisoning Risk: Multi-resolver with FastestWins strategy could prefer compromised resolvers.
Recommendation: Consider validation of responses across multiple resolvers for critical queries.
Missing Timeout Configuration: No configurable timeouts for multi-resolver operations.
Recommendation: Add timeout configuration to prevent indefinite hangs.

Test Coverage

Limited Multi-Resolver Testing: Only basic example usage found in ExampleDnsMultiResolver.cs and one unit test in TestDnssecAdMultiResolver.cs.
Issue: No comprehensive unit tests for edge cases like all resolvers failing, timeout scenarios, or strategy behaviors.
Recommendation: Add comprehensive unit tests for:
- All strategy types with various failure scenarios
- Cancellation token handling
- Resource cleanup on exceptions
- Performance with many resolvers

PowerShell Integration Inconsistency

Limited Multi-Resolver Exposure: Only CmdletTestDomainHealth exposes multi-resolver parameters.
Issue: Individual cmdlets like CmdletTestDnsSec, CmdletTestMxRecord, etc. don't expose multi-resolver options, limiting functionality.
Recommendation: Consider exposing multi-resolver parameters in other key cmdlets where beneficial.

🎯 Specific Recommendations

High Priority

Fix resource management: Replace Task.Run pattern with proper async task creation
Add logging to catch blocks: Replace empty catches with proper exception handling
Implement parallelism limiting: Honor the MultiResolverMaxParallelism parameter

Medium Priority

Optimize task removal: Use HashSet<Task> for O(1) removal operations
Add timeout configuration: Expose timeout settings for multi-resolver operations
Consolidate duplicate code: Extract common logic from resolver methods

Low Priority

Enhance test coverage: Add unit tests for multi-resolver edge cases
Add metrics/telemetry: Consider adding resolver performance metrics

📋 Word Report Sections

The new Word section writers (DaneWordSectionWriter.cs, DnssecWordSectionWriter.cs, MailTlsWordSectionWriter.cs) are well-implemented with:

✅ Consistent structure and styling
✅ Proper null checking and validation
✅ Good integration with existing report framework
✅ Appropriate table layouts and data presentation

Minor suggestion: Consider extracting common table creation patterns into a shared utility method.

🎉 Overall Assessment

This is a solid implementation that adds valuable multi-resolver capabilities while maintaining good code organization. The main concerns are around resource management and performance optimization, but the core functionality is sound. The Word report enhancements are particularly well done and maintain consistency with the existing codebase.

Recommended action: Consider addressing the high-priority resource management issues before merging, as they could impact production stability.

…ree-collections

claude · 2025-09-14T17:00:31Z

Claude finished @PrzemyslawKlys's task —— View job

Claude finished reviewing this PR ✅

Review Tasks:

Read repository guidelines (CLAUDE.md)
Analyze core multi-resolver DNS implementation (DnsConfiguration.cs)
Review new Word report section writers (DANE, DNSSEC, MailTLS, etc.)
Check PowerShell cmdlet modifications for consistency
Examine security implications of DNS changes
Assess performance considerations
Review test coverage for new functionality
Provide comprehensive feedback and recommendations

✅ Positive Aspects

Well-structured multi-resolver implementation: The DnsConfiguration.cs:214-267 multi-resolver logic is clean with clear separation of strategies (FirstSuccess, FastestWins, SequentialAll).
Consistent Word section writers: The new DaneWordSectionWriter, DnssecWordSectionWriter, and MailTlsWordSectionWriter follow identical patterns and maintain consistency with existing report structure.
Proper error handling: DNS fallback logic in DnsConfiguration.cs:99-121 gracefully handles transient network errors with conservative fallback endpoints.
Good PowerShell parameter consistency: Multi-resolver parameters are properly exposed in the main CmdletTestDomainHealth.cs:30-40 cmdlet.

🔍 Areas for Improvement

Code Quality & Best Practices

Resource Management Concern (DnsConfiguration.cs:237-246):
```
tasks.Add(Task.Run(async () => {
    try {
        using var c = new ClientX(endpoint: ep, DnsSelectionStrategy);
        // ... async work
    } catch { return null; }
}, ct));
```
Issue: Task.Run with async lambdas can lead to unobserved exceptions and resource leaks if tasks are not properly awaited.
Recommendation: Use Task.Factory.StartNew with TaskCreationOptions.LongRunning or restructure to avoid Task.Run with async work.
Exception Swallowing (DnsConfiguration.cs:245, DnsConfiguration.cs:328):
```
} catch { return null; }
```
Issue: Empty catch blocks make debugging difficult and hide potential issues.
Recommendation: Log exceptions at minimum, or catch specific exception types.
Duplicate Code: Methods ResolveWithEndpoints and ResolveResponseWithEndpoints share ~80% identical logic.
Recommendation: Extract common logic into a shared private method with generic return type.

Performance Considerations

Task Management Inefficiency (DnsConfiguration.cs:250-256):
```
while (tasks.Count > 0) {
    var finished = await Task.WhenAny(tasks).ConfigureAwait(false);
    tasks.Remove(finished);  // O(n) operation in loop
```
Issue: List.Remove() is O(n), making this O(n²) for large resolver lists.
Recommendation: Use HashSet<Task> or mark completed tasks instead of removing.
No Parallelism Limiting: The MultiResolverMaxParallelism parameter is defined but not implemented.
Issue: Could cause resource exhaustion with many resolvers.
Recommendation: Implement semaphore-based throttling when MultiResolverMaxParallelism is set.

Security Considerations

DNS Cache Poisoning Risk: Multi-resolver with FastestWins strategy could prefer compromised resolvers.
Recommendation: Consider validation of responses across multiple resolvers for critical queries.
Missing Timeout Configuration: No configurable timeouts for multi-resolver operations.
Recommendation: Add timeout configuration to prevent indefinite hangs.

Test Coverage

Limited Multi-Resolver Testing: Only basic example usage found in ExampleDnsMultiResolver.cs and one unit test in TestDnssecAdMultiResolver.cs.
Issue: No comprehensive unit tests for edge cases like all resolvers failing, timeout scenarios, or strategy behaviors.
Recommendation: Add comprehensive unit tests for:
- All strategy types with various failure scenarios
- Cancellation token handling
- Resource cleanup on exceptions
- Performance with many resolvers

PowerShell Integration Inconsistency

Limited Multi-Resolver Exposure: Only CmdletTestDomainHealth exposes multi-resolver parameters.
Issue: Individual cmdlets like CmdletTestDnsSec, CmdletTestMxRecord, etc. don't expose multi-resolver options, limiting functionality.
Recommendation: Consider exposing multi-resolver parameters in other key cmdlets where beneficial.

🎯 Specific Recommendations

High Priority

Fix resource management: Replace Task.Run pattern with proper async task creation
Add logging to catch blocks: Replace empty catches with proper exception handling
Implement parallelism limiting: Honor the MultiResolverMaxParallelism parameter

Medium Priority

Optimize task removal: Use HashSet<Task> for O(1) removal operations
Add timeout configuration: Expose timeout settings for multi-resolver operations
Consolidate duplicate code: Extract common logic from resolver methods

Low Priority

Enhance test coverage: Add unit tests for multi-resolver edge cases
Add metrics/telemetry: Consider adding resolver performance metrics

📋 Word Report Sections

The new Word section writers (DaneWordSectionWriter.cs, DnssecWordSectionWriter.cs, MailTlsWordSectionWriter.cs) are well-implemented with:

✅ Consistent structure and styling
✅ Proper null checking and validation
✅ Good integration with existing report framework
✅ Appropriate table layouts and data presentation

Minor suggestion: Consider extracting common table creation patterns into a shared utility method.

🎉 Overall Assessment

This is a solid implementation that adds valuable multi-resolver capabilities while maintaining good code organization. The main concerns are around resource management and performance optimization, but the core functionality is sound. The Word report enhancements are particularly well done and maintain consistency with the existing codebase.

Recommended action: Consider addressing the high-priority resource management issues before merging, as they could impact production stability.

PrzemyslawKlys added 2 commits September 8, 2025 19:13

github-actions bot and others added 4 commits September 8, 2025 17:31

chore: regenerate psd1

2db376a

feat(ns-analysis): ✨ Enhance ASN diversity tracking and reporting

e90470c

* Added `AsnDistinctCount` to track distinct ASNs in NS analysis. * Updated `NsWordSectionWriter` to include ASN diversity in reports. * Introduced unit tests for ASN diversity analysis.

Merge branch 'Improvements1' of https://github.com/EvotecIT/TestMyDomain

872af67

into Improvements1

PrzemyslawKlys added 12 commits September 8, 2025 21:52

PrzemyslawKlys added 6 commits September 9, 2025 23:23

PrzemyslawKlys added 2 commits September 14, 2025 09:10

feat(narratives): ✨ add negatives support

9bf74ed

Merge pull request #970 from EvotecIT/extend-narrativesections-with-n…

0f6e5e3

…egatives-list

PrzemyslawKlys added 2 commits September 14, 2025 18:08

feat(diagnostics): ✨ split assessment titles by severity

479836a

Merge pull request #971 from EvotecIT/modify-splittitles-to-output-th…

a33825b

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