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Date:      Sun, 29 Aug 1999 00:32:01 -0700
From:      dmp@aracnet.com
To:        freebsd-questions@freebsd.org
Subject:   10net-source connects to ports 1492 and 1436?
Message-ID:  <37C8E1F1.EE9BB929@aracnet.com>

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I wasn't sure if this was worthy of freebsd-security, let me know if
it is.

Going over the day's logs, I found the following entries from my
gateway in /var/log/messages:

Aug 28 09:54:34 gw /kernel: ipfw: 700 Deny TCP 10.1.65.16:80 x.x.x.x:1436 in via ep0
Aug 28 09:55:19 gw last message repeated 5 times
Aug 28 09:56:07 gw /kernel: ipfw: 700 Deny TCP 10.1.65.16:80 x.x.x.x:1436 in via ep0
Aug 28 10:00:55 gw last message repeated 2 times
Aug 28 10:05:13 gw /kernel: ipfw: 700 Deny TCP 10.1.65.17:80 x.x.x.x:1492 in via ep0
Aug 28 10:05:34 gw last message repeated 4 times
Aug 28 10:06:46 gw last message repeated 2 times
Aug 28 10:11:34 gw last message repeated 2 times

ep0 is the interface to the internet

I've got an okay understanding that the "attacker" was supposedly
posing as a web server and preventing a trace with an unroutable IP.
But I don't get the significance of TCP 1436 and 1492.


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