Hello everyone, I just figured out the configuration issue causing my problem. Original configuration mod_proxy_wstunnel with SwampDragon: ProxyPass /data/ ws://127.0.0.1:9001/data/ ProxyPassReverse /data/ ws://127.0.0.1:9001/data/ ProxyPass /settings.js http://127.0.0.1:9001/settings.js ProxyPassReverse /settings.js http://127.0.0.1:9001/settings.js ProxyPreserveHost On ProxyRequests Off ProxyVia On The following configuration for mod_proxy_wstunnel with SwampDragon works fine: ProxyPassMatch /data/(\d+)/(\w+)/websocket ws://127.0.0.1:9001/data/$1/$2/websocket ProxyPass /data/info http://127.0.0.1:9001/data/info ProxyPassReverse /data/info http://127.0.0.1:9001/data/info ProxyPass /settings.js http://127.0.0.1:9001/settings.js ProxyPassReverse /settings.js http://127.0.0.1:9001/settings.js ProxyPreserveHost On ProxyRequests Off ProxyVia On The issue was caused by the fact that /data/info is requested before a WebSocket-upgrade request to /data/(\d+)/(\w+)/websocket is performed. Because /data/info was redirected to the WebSocket-server using the same rule as /data/(\d+)/(\w+)/websocket before, mod_proxy_wstunnel continued to also forward all HTTP-traffic to the WebSocket-server. Hope this helps in case anyone else runs into the same problem. You have to make sure that ws:// or was:// forwarding is only configured for the actual WebSocket-URL and does not affect any other requests. Thanks for pointing me into the right direction. Best regards, Marc --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx