From: Kurt Tragant <k.tragant@firemail.de>
To: netfilter@lists.netfilter.org
Subject: strange log entries concerning mail server
Date: Thu, 13 Feb 2003 18:03:28 +0100 [thread overview]
Message-ID: <1045155808018141@lycos-europe.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 1230 bytes --]
Hello list,
I have some strange entries in my firewall log concerning our mailserver. Every
day there are numerous entries with packets coming from source ports 850-910 to
a very high destination port. An excerpt, you see below. x.y.z.[0-9]* is the
host outside, a.b.c.d is our mailserver (to protect the innocent ;-)).
Feb 13 08:29:26 localhost kernel: IN=eth0 OUT=eth1 SRC=x.y.z.83 DST=a.b.c.d
LEN=143 TOS=0x00 PREC=0x00 TTL=55 ID=8196 DF PROTO=TCP SPT=859 DPT=56926
WINDOW=24616 RES=0x00 ACK PSH FIN URGP=0
Feb 13 13:32:36 localhost kernel: IN=eth0 OUT=eth1 SRC=x.y.z.83 DST=a.b.c.d
LEN=84 TOS=0x00 PREC=0x00 TTL=55 ID=45926 DF PROTO=TCP SPT=902 DPT=57334
WINDOW=24616 RES=0x00 ACK PSH FIN URGP=0
Feb 13 13:32:45 localhost kernel: IN=eth0 OUT=eth1 SRC=x.y.z.83 DST=a.b.c.d
LEN=84 TOS=0x00 PREC=0x00 TTL=55 ID=45951 DF PROTO=TCP SPT=902 DPT=57334
WINDOW=24616 RES=0x00 ACK PSH FIN URGP=0
For an answer I thank you in advance.
Regards
Kurt Tragant
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next reply other threads:[~2003-02-13 17:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-13 17:03 Kurt Tragant [this message]
[not found] <20030213171002.5495.70915.Mailman@kashyyyk>
2003-02-15 22:05 ` strange log entries concerning mail server Willi Mann
-- strict thread matches above, loose matches on Subject: below --
2003-02-17 11:20 Kurt Tragant
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