On Fri, Aug 01, 2008 at 12:08:38AM -0500, Mike Silbersack wrote: > > > On Fri, 18 Jul 2008, Bernd Walter wrote: > > >443 is a self written server, but it also happens with port 80 and > >sslproxy. > >The client is a telnet, which disconnects directly after connecting, > >so the disconnect is initiated from the client, which seems to be > >important for this problem to trigger. > > > >You can see that the FIN handshake completes and netstat on the > >client box shows the connection in TIME_WAIT. > >The server however has the connection still in ESTABLISHED state. > > Well, syncookies allow the ack of the 3WHS to establish a connection. > Just a quick look at your tcpdump shows that since you aren't sending any > data you are not advancing the sequence number. As a result, it looks > like one of the ACKs the client sends during connection shutdown may > actually be causing the server to re-establish the connection.
Ah - that makes sense. > You might want to file a PR with exact instructions (and code) that'll > easily reproduce this so that it can be solved at some point in the > future. I don't have time to look into it now, although I'd be happy to > code review a fix! Thank you - I will file a PR. -- B.Walter <[EMAIL PROTECTED]> http://www.bwct.de Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm. _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"