[TriLUG] finding a MAC address

[Shawn Taylor]

Yes the below is correct.

Christopher Wrote:

AFAIK, the only thing on our network that is NATing is the firewall
and the firewall is the only way to get out of our network. So my
understanding is that it it is on our network and is going outside,
it MUST be seen by the firewall.  Is that right?


But if you did an arp -a on your firewall and did not see the MAC address
then it has not attempted to go out.

Shawn
-----Original Message-----
From: trilug-bounces at trilug.org [mailto:trilug-bounces at trilug.org]On Behalf
Of Christopher L Merrill
Sent: Friday, August 15, 2008 11:03 AM
To: Triangle Linux Users Group General Discussion
Subject: Re: [TriLUG] finding a MAC address

Matthew Pusateri wrote:
> I take it, that you do not have managed switches that you could look
> in, to find the MAC address on a specific port?

No, but our firewall is a BSD box.  I did "arp -a" on that and
got a list of IPs and MACs, but none of them match the MAC address
that is causing the problem.

AFAIK, the only thing on our network that is NATing is the firewall
and the firewall is the only way to get out of our network. So my
understanding is that it it is on our network and is going outside,
it MUST be seen by the firewall.  Is that right?

Chris

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