North American Network Operators Group
Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re: Blocking port udp/tcp 1433/1434

  • From: Jeff Kell
  • Date: Wed May 11 13:43:52 2005
  • Openpgp: url=http://www.utc.edu/Staff/Jeff-Kell/pgpkey.txt
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Chip Mefford wrote:

> on my "at work" small network, slammer (or slammer like) traffic is
> still around 2% of inbound blocked traffic. (just a dead end off
> of asn 6467)

Almost every time I update our border ingress ACL (which removes the ACL
for as long as it takes to load the new one, perhaps a few seconds) it
triggers IDS alerts on 1433/1434, often specifically the slammer packet
itself.  (usually thanks to AS209)

The SANS ISC currently gives an "Internet Survival Time" of 24 minutes
for an unpatched windows box.  I would give an unpatched Windows server
with an old copy of MSSQL a considerably shorter lifespan :-)

Jeff
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (MingW32)

iD8DBQFCgkREot2VatFbXMERAhbeAJ9GLe6HUa8nuOB5AeYfbSEcyfEsNwCgiqG+
flADbuPxyxr06xaBIRROcXw=
=lqFY
-----END PGP SIGNATURE-----