HTTP HTTP POST client-body-tagger HTTP/1.1 200 OK Connection: close Content-Type: text/html X-Connection: swsclose Received your input. http Two requests to the same URL. The second one is a POST request but it's not expected to be blocked due to a tag. proxy -s --write-out '%{stderr}%{response_code}\n' http://%HOSTIP:%HTTPPORT/%TESTNUMBER --next -d "%repeat[5000 x padding]%bumfidel" -s --write-out '%{stderr}%{response_code}\n' http://%HOSTIP:%HTTPPORT/%TESTNUMBER GET /%TESTNUMBER HTTP/1.1 Host: %HOSTIP:%HTTPPORT User-Agent: curl/%VERSION Accept: */* Connection: close POST /%TESTNUMBER HTTP/1.1 Host: %HOSTIP:%HTTPPORT User-Agent: curl/%VERSION Accept: */* Content-Length: 35008 Content-Type: application/x-www-form-urlencoded Connection: close %repeat[5000 x padding]%bumfidel 200 200