On Mon, Mar 10, 2008 at 08:12:37PM -0400, Peter Tripp wrote:
Hello all,
I've got an issue I'm almost positive is not related to Dovecot, but was wondering whether anyone else has had similar problems or could duplicate
Me: SYN Paradox: SYN, ACK Me: ACK Me: Client Hello Paradox: ACK Paradox: FIN, ACK Me: ACK Paradox: FIN, ACK Me: ACK -dead-
http://duckies.org/~peter/damncingular.txt
I notice a 6-7 second delay between the first ACK and the first FIN,ACK. Is your dovecot server perhaps unable to do a DNS lookup on the connecting IP? It would be very informative to see what the dovecot server is sending (or not sending) including generated traffic such as DNS queries, if you can isolate that. Is anything in the dovecot logs? Wondering if it is related to something like tcp wrappers.