Windows Live Mail rejecting GROUP response
Matt Seitz (matseitz)
matseitz at cisco.com
Mon Jun 4 20:49:52 UTC 2012
> From: Matt Seitz (matseitz)
> > From: Julien ÉLIE [mailto:julien at trigofacile.com]
> > I think this inequality occurred so maybe the problem is generated by another reply;
> Hmm, I just notices there is one more reply from the INN server following the GROUP reply. But I don't see a corresponding request from
> WLMail, so I'm not sure what this additional reply means.
I reviewed RFC 3977 further and determined that response code 205 is supposed to be returned when a client sends a QUIT command. In this case, I see Windows Live Mail sending a TCP FIN, but not an NNTP QUIT. But INN seems to be responding to the TCP FIN as if the client had sent an NNTP QUIT.
Would that violate Section 5.4.2?
"If a client simply disconnects (or if the connection times out or
some other fault occurs), the server MUST gracefully cease its
attempts to service the client, disconnecting from its end if
Here's a summary of the relevant part of the exchange:
No. Time Source Destination Protocol Length Info
8 13:16:46.819445000 dhcp-171-71-137-42.cisco.com snews-sj.cisco.com NNTP 84 Request: GROUP cisco.eng.cdets-trolls
9 13:16:46.819956000 snews-sj.cisco.com dhcp-171-71-137-42.cisco.com TCP 60 nntp > 51333 [ACK] Seq=133 Ack=44 Win=49640 Len=0
10 13:16:46.820113000 snews-sj.cisco.com dhcp-171-71-137-42.cisco.com NNTP 94 Response: 211 6907 1 6910 cisco.eng.cdets-trolls
11 13:16:46.820444000 dhcp-171-71-137-42.cisco.com snews-sj.cisco.com TCP 54 51333 > nntp [FIN, ACK] Seq=44 Ack=173 Win=65528 Len=0
12 13:16:46.820899000 snews-sj.cisco.com dhcp-171-71-137-42.cisco.com TCP 60 nntp > 51333 [ACK] Seq=173 Ack=45 Win=49640 Len=0
13 13:16:46.820955000 snews-sj.cisco.com dhcp-171-71-137-42.cisco.com NNTP 61 Response: 205 .
14 13:16:46.821098000 dhcp-171-71-137-42.cisco.com snews-sj.cisco.com TCP 54 51333 > nntp [RST, ACK] Seq=45 Ack=180 Win=0 Len=0
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