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.
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!
-Mike _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
