Snort mailing list archives

Re: Sudden surge of MISC IP Reserved bit set


From: John Sage <jsage () finchhaven com>
Date: Fri, 10 Aug 2001 10:29:40 -0700

umm..

Unless you munged the IP's in your post, this is all happening internal to your network.

What's at 192.168.12.249?

Who was on 192.168.12.249 when this was happening?

What were they doing?

- John



Tom Sevy wrote:

This morning, for an unknown reason(s), I am seeing a deluge of MISC IP
Reserved bit setup.

Starting at 9:18, until 9:38 (about 20 minutes) I saw 53,152 of these show
up.  77 Sources, 43 destinations.

Any idea what would cause this?  We run a mix of MS & *nix systems.

Here's a sample (minus payload):

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~

#(2 - 74518) [2001-08-10 09:30:49]  MISC IP Reserved bit set
IPv14: 192.168.12.249 -> 192.168.10.10
      hlen=7 TOS=0 dlen=204 ID=32769 flags=0 offset=0 TTL=55 chksum=194
Payload:  length = 164




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