Re: Broadcast pings.

[Joe Shaw <jshaw () insync net>]

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.

Regards,
Joe Shaw - jshaw () insync net
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
> jamie () fast net (610)954-5200 http://www.fast.net/
> FASTNET - Business and Personal Internet Solutions