Blocking port udp/tcp 1433/1434

Wed May 11 22:12:58 UTC 2005

On Wed, 11 May 2005, Christopher L. Morrow wrote:

> > Is there still justification for denying transit for ms-sql slammer ports?
>
> probably not, but that's really a local-to-your-asn decision.

I dunno about that.  I know it was more than a year ago, but at NANOG
Miami, someone brought either SQL slammer or a vulnerable laptop and
killed the network for a while.  Running tcpdump on my notebook, I noticed
fairly constant slammer probes while there.  We still block it here, and
the last time we accidentally removed that filter, a colo customer was
promptly infected.

----------------------------------------------------------------------
 Jon Lewis                   |  I route
 Senior Network Engineer     |  therefore you are
 Atlantic Net                |
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