Re: [Snort-users] Speedera

["Paul Murphy" <paul.murphy () crestco co uk>]

Thanks John.  My mailserver is behind a firewall that blocks ICMP.  I suppose my question was twofold:  Why is my 
mailserver managing to emit icmp at all, and when it does, why do they have the speedera signature?

So I guess this is ot really for this list, as I can stop Snort triggering because of this, but I still don't know why 
it is happening in the first place.

Any offers?

Paul.



> > > John Sage <jsage () finchhaven com> 6/11/2001 06:58:26 pm >>>
Paul:

I had to work on ping-lib to keep it from worrying about all sorts of stuff.

You may want to do something like this:

alert icmp !$HOME_NET any -> $HOME_NET any (msg:"ICMP Echo Request"; 
itype:8;)

If I remember correctly, the original syntax was "any any <> $HOME_NET 
any" which alerts for stuff going in or out...

- John

-- 
John Sage
FinchHaven, Vashon Island, WA, USA
http://www.finchhaven.com/ 
mailto:jsage () finchhaven com 
"The web is so, like, five minutes ago..."


Paul Murphy wrote:

> Hi all,
>
> Does anyone have any ideas why my Snort is picking up Speedera ICMPs *outbound* from my mail server?
>
> They are echo requests btw.
>
> Thanks,
>
> Paul.



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