Date: Mon, 21 Mar 2005 23:18:20 +0100 From: Robert Gogolok <robertgogolok@web.de> To: Charles Swiger <cswiger@mac.com> Cc: freebsd-questions@freebsd.org Subject: Re: FIN_WAIT_2 Message-ID: <423F482C.2070400@web.de> In-Reply-To: <a4ea0446f316eef2d1eccd68bd552878@mac.com> References: <423EFE41.6040805@web.de> <56b90b3668acea792519e1e70a7b837a@mac.com> <423F05F2.3010101@web.de> <7c82a2d1780970b84810aefc59bdb295@mac.com> <423F17D9.70802@web.de> <a4ea0446f316eef2d1eccd68bd552878@mac.com>
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Charles Swiger wrote: > If the TCP connection is in FIN_WAIT_2, FreeBSD may send out ACKs > periodicly, trying to nudge the other side to send a FIN to finish > closing the connection. This is indeed the case (when I interpret the tcpdump output correct): 21:19:20.139373 IP HTTP_SERVER.http > HTTP_CLIENT.63131: . ack 2918467318 win 0 21:19:20.139543 IP HTTP_SERVER.http > HTTP_CLIENT.63131: . ack 2918467318 win 65535 21:24:05.098980 IP HTTP_SERVER.http > HTTP_CLIENT.63131: . ack 2918467318 win 0 21:24:05.099151 IP HTTP_SERVER.http > HTTP_CLIENT.63131: . ack 2918467318 win 65535 . . AND SO ON :-) . 22:11:34.665056 IP HTTP_SERVER.http > HTTP_CLIENT.63131: . ack 2918467318 win 0 22:11:34.665225 IP HTTP_SERVER.http > HTTP_CLIENT.63131: . ack 2918467318 win 65535 22:16:19.621661 IP HTTP_SERVER.http > HTTP_CLIENT.63131: . ack 2918467318 win 0 22:16:19.621824 IP HTTP_SERVER.http > HTTP_CLIENT.63131: . ack 2918467318 win 65535 HTTP_SERVER.http > HTTP_CLIENT.63131 is in FIN_WAIT_2 state. After the last line it stopped and go away from FIN_WAIT_2 as expteced (timeout...). And the firewall rejects/drops exactly those packages. The client is not responding. Greetings, Robert!
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