North American Network Operators Group

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Re: Broadcast pings.

  • From: Joe Shaw
  • Date: Tue Dec 23 11:48:51 1997

I had a customers link go down because they were the target of a smurf
attack a few weeks ago, and when I was sniffing the link to find out what
was going on, I found tons of packets coming from root nameservers, .gov
sites, and other places.  If I hadn't been at a terminal, I'd have done a
better job of logging them when it happened.  As it stands, I just turned
off ICMP into my routers for a few hours and all was well.  What I would
have given to have had a dedicated sniffer so I could have done a better
job of logging.

Joe Shaw - [email protected]
NetAdmin - Insync Internet Services
Fortune for the day: "Speak softly and carry a +6 two-handed sword."

On Mon, 22 Dec 1997, Jamie Scheinblum wrote:

> Has anyone seen an increase of broadcast pings, where the source route
> appears to be from a nameserver?
> We took a look through our access-list logs, and it seems all of the
> attempted attacks during the last few days have had an IP-source of a
> nameserver.
> Just thought it was curious.
> Best regards,
> Jamie Scheinblum - FASTNET(tm) / You Tools Corporation
> [email protected] (610)954-5200
> FASTNET - Business and Personal Internet Solutions