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feat: add SNI configuration option for HEC TLS destinations #2966

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feat: add SNI configuration option for HEC TLS destinations #2966

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1 change: 1 addition & 0 deletions docs/destinations.md
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@ You can configure Splunk Connect for Syslog to use any destination available in
| SC4S_DEST_SPLUNK_HEC_<ID>_MODE | string | "GLOBAL" or "SELECT". |
| SC4S_DEST_SPLUNK_HEC_<ID>_TLS_VERIFY | yes(default) or no | Verify HTTP(s) certificates. |
| SC4S_DEST_SPLUNK_HEC_<ID>_HTTP_COMPRESSION | yes or no(default) | Compress outgoing HTTP traffic using the gzip method. |
| SC4S_DEST_SPLUNK_HEC_<ID>_SNI | yes or no(default) | Enable TLS Server Name Indication (SNI). When enabled, SC4S sends the HEC destination hostname during the TLS handshake, which allows SSL/TLS passthrough load balancers to make routing decisions based on the target hostname. |

## HTTP Compression

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3 changes: 3 additions & 0 deletions package/etc/conf.d/destinations/dest_hec/plugin.jinja
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Expand Up @@ -44,6 +44,9 @@ destination d_hec{{ dest_mode }}{{ altname }}{
{%- if ssl_version %}
ssl-version("{{ ssl_version }}")
{%- endif %}
{%- if sni %}
sni(yes)
{%- endif %}
)
use-system-cert-store(yes)
body('{{ msg_template }}')
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1 change: 1 addition & 0 deletions package/etc/conf.d/destinations/dest_hec/plugin.py
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Expand Up @@ -144,6 +144,7 @@ def hec_endpoint_collector(hec_path, url_hec):
peer_verify=os.getenv(f"SC4S_DEST_SPLUNK_HEC_{group}_TLS_VERIFY", "yes"),
cipher_suite=os.getenv(f"SC4S_DEST_SPLUNK_HEC_{group}_CIPHER_SUITE"),
ssl_version=os.getenv(f"SC4S_DEST_SPLUNK_HEC_{group}_SSL_VERSION"),
sni=os.getenv(f"SC4S_DEST_SPLUNK_HEC_{group}_SNI", "no").lower() in ["true", "1", "t", "y", "yes"],
http_compression=http_compression
)

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