Hi guys,

I'm a Checkpoint DMZ virgin, have to admit, and because of Citrix and
alternate address requirements I more or less have to setup a DMZ
interface using some of our block of 12 public IP addresses on the
servers therein as opposed to just using our existing private
192.168.x.x network and NATing servers to our public IP addresses as I
usually do (which may or may not be optimal).  I have an IP110 with IPSO
3.5FCS7 and 4.1 SP-6.

This is the existing setup:

Internet Router
|
|
(eth-s1p1)
IP110
(eth-s2p1)-- Private 192.168.x.x network with Hide NAT, some servers
NATed to public IPs
(eth-s3p1)-- unused

My desired config would look like this:

Internet Router
|
|
(eth-s1p1)
IP110
(eth-s2p1)-- Private 192.168.x.x network with Hide NAT, some servers
NATed to public IPs
(eth-s3p1)-- DMZ w/Public IPs


I just spoke to Nokia support about setting this up and got the
following information, though the guy seemed somewhat unsure of his
advice:

1) in Voyager, setup eth-s3p1 with another IP address from our Public
block (as per how the eth-s1p1 external interface is defined)
2) in FW-1, define the eth-s3p1 network
3) creates rules, address translation between the eth-s2p1 network and
eth-s3p1 network, etc.

Is that basically all there is to it?

Will having some of our block of public IP addresses NATed from the
private network on eth-s2p1 conflict with the others on eth-s3p1, even
if they are not the same addresses (of course)?

Also, is it necessary to waste a public IP on the eth-s3p1 interface
itself?  I know that on Sonicwalls, you do not have to have an IP for
the DMZ interface itself, just for the devices on that interface.
Perhaps I could set the public Hide NAT IP (for the private network on
eth-s2p1) to the public address of the eth-s3p1 interface, so as not to
use another IP up?  Would there be problems with that?

thanks,
Chris

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