I've been pouring through the docs and archives but can't seem to find the
answer to these.

I've got a setup similar to Tom's 3 interface example, but with public IPs
in the DMZ and proxy arp set to allow access to them.

Question 1:  If I want to firewall all but the necessary public services
from the DMZ machines, should I be using SNAT rather than proxy arp?  I
guess I don't understand how shorewall interacts with proxy arp'ed machines
if at all.

Question 2:  If using proxy arp, should clients on the internal network be
able to access the DMZ machines by their public IP?

Question 3:  There is a public IP address that has a different gateway than
the block of IP addresses currently in the DMZ.  If I use SNAT with that IP,
is there any way to specify a different gateway?  I'm struggling to
understand this part so if this makes no sense please ignore it.

I apologize if this is covered somewhere.  I've read the setup guide, Lynn
Avant's proxy arp howto, and a lot of docs on the shorewall site but I'm
still unclear on these points.

Thanks!

- Bob Coffman




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