Monday, July 19, 2021

TCP issue

Dealing with an issue where TCP not completing and times out.

The sender says timeout. The recievers PCAP shows the senders the TCP SYN, but the reciever replies immediately with a TCP RST/ACK.

Cause of that the TCP session fails to form and nothing is sent.

Does anyone know of or have an official document (preferably RFC) which covers the potential flags and causes of those flags when an RST and RST ACK is sent? That would help with diagnosis greatly. And my Google Fu is failing me on this one.

Thanks



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