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udp packets going to nntp server after app closed

 
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wordsmith

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Since: Nov 20, 2008
Posts: 10



(Msg. 1) Posted: Tue Jan 20, 2009 6:28 pm
Post subject: udp packets going to nntp server after app closed
Archived from groups: comp>os>linux>security (more info?)

just watching the packets go by with wireshark and trying to debug why my
nntp service is so unreliable from day to day...noticed 5 or 6 minutes
after shutting down pan, and watching the process of a traceroute with
the output from wireshark that something was sending udp packets to the
nntp server...speculation?

--
just shut up and run
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Moe Trin

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Since: Dec 26, 2004
Posts: 371



(Msg. 2) Posted: Wed Jan 21, 2009 2:00 pm
Post subject: Re: udp packets going to nntp server after app closed [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

On Tue, 20 Jan 2009, in the Usenet newsgroup comp.os.linux.security, in article
<AImdnVST1ZGI8evUnZ2dnUVZ_orinZ2d.DeleteThis@supernews.com>, wordsmith wrote:

>just watching the packets go by with wireshark and trying to debug why
>my nntp service is so unreliable from day to day...noticed 5 or 6
>minutes after shutting down pan, and watching the process of a
>traceroute with the output from wireshark that something was sending
>udp packets to the nntp server...speculation?

http://www.catb.org/~esr/faqs/smart-questions.html

Without any details - SPECIFICALLY actual port numbers, which specific
news server, packet details, etc., all speculation is meaningless.
NNTP is a TCP protocol. Depending on the version of traceroute, it may
be using UDP (most *nix versions) or ICMP (b0rken versions - such as
TRACERT.EXE from microsoft), or even TCP (quite rare). Was the news
server _originating_ the packets, or replying to something you were
doing. Note also that UDP is trivial to spoof - so what was in those
packets? What port on "your" side? What did '/bin/netstat -anptu'
show?

As for "unreliable" NNTP, what exactly is that supposed to mean? What
news reader are you using? Pan? How? What distribution/release? Are
you using it native, or is some virtual stuff involved? What ELSE is
running?

Old guy
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