NGINX configuration

Make sure you use at least NGINX 1.3.13 to use the websocket feature. Say you installed WalrusIRC in /var/www/walrusirc on port 4200:

server {
        listen 80;
        listen [::]:80;

        server_name walrusirc.example.com;
        root /var/www/walrusirc/public;

        error_page 404 /404.html;
        error_page 502 =503 /503.html;

        # Add either every non-static locations here, or just do location /
        location ~ ^/(socket.io|logs)/ {
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "upgrade";
                proxy_http_version 1.1;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header Host $host;
                proxy_pass http://localhost:4200;
        }
}

Reload NGINX and your WalrusIRC installation should be accessible on http://walrusirc.example.com.