[Wolves] subnetting

[Simon Burke]

Hiya,

Im having a small nightmare today. Im looking at my firewall logs.
It's saying that a specific IP is trying to spoof the network and its
marked as a being critical.

Fair enuff. The problem is that is the very first  public address in
our subnet, (ie not a useable adress).

Does anyone know why this is happening?

Oh and anti-spoofing is switched off on the external interface also.

The firewall is a PIX 501.

I'd really appreciate it if someone could tell me what the first
address does as i knida forgot and im reading rfc950 trying to find
out, but no luck yet.

-- 
Theres no place like ::1

Thanks,
SimonB