Re: gmane "Server Closed Connection" problem on Vista

[Ted Zlatanov <tzz@lifelogs.com>]

On Fri, 15 May 2009 21:33:10 +0200 Steinar Bang <sb@dod.no> wrote: 

>>>>>> Steinar Bang <sb@dod.no>:
>> I have a wireshark sniff of a failed group open, and just looking at the
>> NNTP traffic doesn't yield any clues.,

>> The last thing that goes on there, is:

SB> [snip!]
>> .
>> 205 .

SB> 205 is NNTP for "closing connection - goodbye!"

SB> So that mean that the server actually closes the connection (at least
SB> from Gnus' point of view).

>> If I look at the packages, then the client side sends a FIN, ACK, and
>> then a RST, ACK, just before the connection terminates.

SB> FIN means that the sender (which in this case is the client machine) has
SB> no more data, and RST is reset the connection.

SB> If the time stamps of the packages, and the order in wireshark can be
SB> trusted, then for some reason, the TCP connection is torn down from the
SB> client side, and the NNTP server responds to the terminating TCP
SB> connection with a 250 response... which of course makes Gnus thinks the
SB> server has closed the connection.

SB> But where the FIN and RST comes from, I have no idea.

Sorry for the delay in responding.

I wondered how this could be debugged, but I have no idea.  It's truly
bizarre that this only happens on Windows.  My best guess is that
something else is interfering and sending those FIN/RST packets, like a
software firewall perhaps.  I can't duplicate it on a Windows machine.
Can you duplicate on another Windows machine, ideally outside your
current environment?

Ted