Hi John, On Wed, Jan 25, 2023 at 08:59:49AM +1100, John Watts wrote: > Hi, > > I had a read of the RATP spec at https://www.rfc-editor.org/rfc/rfc916 > > The goal is to detect one end trying to start a fresh connection while another > is established but manages to be a bit too broad by specifying that any SYN > is an error rather than a SYN without an ACK. > > There seems to be two solutions here: > > - Don't re-send SYN packets > - Break the spec and check if ACK is set before terminating the connection Yes, i think that's the best thing to do, to ingnore SYN-ACK packets, new connections should only start with a SYN. Thanks -- Jules
