Blocking port udp/tcp 1433/1434

Jeff Kell jeff-kell at utc.edu
Wed May 11 17:43:32 UTC 2005


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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
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