SIP/2.0 400 Bad Request
Call-ID: 50000
Content-Length: 0
CSeq: 42 OPTIONS
From: <sip:nm@nm>;tag=root
To: <sip:nm2@nm2>;tag=dbb48fbec6f34d1de3317de5cb73e104
User-Agent: InterVideo UAS/3.0
Via: SIP/2.0/UDP nm;rport=26810;received=192.168.10.1;branch=foo

nginx

HTTP/1.1 400 Bad Request
Server: nginx
Date: Fri, 31 May 2024 01:46:52 GMT
Content-Type: text/html
Content-Length: 650
Connection: close

Apache Tomcat/Coyote JSP engine1.1

HTTP/1.1 404 Not Found
Server: Apache-Coyote/1.1
Content-Length: 0
Date: Fri, 24 May 2024 20:51:14 GMT

HTTP/1.1 500 Internal Server Error
Access-Control-Allow-Headers: x-requested-with,content-type,x-dss-object-uri,x-dss-object-position,x-dss-next-append-position,x-dss-request-id,x-dss-errcode,x-dss-errmsg,x-dss-request-id,keep-file-open,x-csrf-token
Access-Control-Allow-Methods: PUT,POST,GET,OPTIONS,DELETE
Access-Control-Allow-Origin: *
Access-Control-Expose-Headers: x-requested-with,content-type,x-dss-object-uri,x-dss-object-position,x-dss-next-append-position,x-dss-request-id,x-dss-errcode,x-dss-errmsg,x-dss-request-id
Date: Sat, 01 Jun 2024 04:20:40 GMT
Content-Length: 0

Apache ActiveMQ

ERROR\ncontent-type:text/plain\nmessage:Unknown STOMP action: HELP\n\norg.apache.activemq.transport.stomp.ProtocolException: Unknown STOMP action: HELP\n\tat org.apache.activemq.transport.stomp.ProtocolConverter.onStompCommand(ProtocolConverter.java:258)\n\tat org.apache.activemq.transport.stomp.StompTransportFilter.onCommand(StompTransportFilter.java:85)\n\tat org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:83)\n\tat org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:233)\n\tat org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:215)\n\tat java.lang.Thread.run(Thread.java:748)\n\x00\n