HTTPS HTTP POST client-body-tagger HTTP/1.1 200 OK Connection: close Content-Type: text/html X-Connection: swsclose Received your input. HTTP/1.1 200 Connection established HTTP/1.1 200 OK Connection: close Content-Type: text/html X-Connection: swsclose Received your input. https Two requests to the same URL. The second one is large and blocked based on a tag. Offending phrase in the middle of the content. proxy -s --write-out '%{stderr}%{response_code}\n' --insecure https://%HOSTIP:%HTTPSPORT/%TESTNUMBER --next -d "%repeat[5000 x padding]% blafasel tralala" -s --write-out '%{stderr}%{response_code}\n' --insecure https://%HOSTIP:%HTTPSPORT/%TESTNUMBER GET /%TESTNUMBER HTTP/1.1 Host: %HOSTIP:%HTTPSPORT User-Agent: curl/%VERSION Accept: */* 200 403