full-disclosure - Strange packets

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From: warchild at spoofed.org (Jon Hart)
Subject: Strange packets

On Sun, Aug 24, 2003 at 07:06:37AM -0600, Henna Yatsu wrote:
> Hello All,
> 
> For the past few days, a few packet of protocol number 99 has captured
> in our network.  Do someone know the meaning of this packet?

>From http://www.iana.org/assignments/protocol-numbers, you can see that
IP protocol 99 is reserved for any private encryption scheme.

I saw a number of these packets coming from seemingly random machines a
few months back.  When I did some work to see where they were coming
from, it turns out they were all US military (primarily US Army)
machines.  It is entirely possible that the addresses were spoofed.

I am now seeing this traffic again.  It started on 8/19/03 and
continues.  All but 2 packets have been originating from net blocks
belonging to the US military.  These two rogue packets came from an ISP
in the UK.

-jon