Modify default external ip adress in ISA 2006

Posted on 2010-09-17
Last Modified: 2012-05-10
We have been decommissioning an old firewall, and this has worked well except for one glitch.  Some external services that we use, like the old firewalls default external IP address (public ip address).  I have brought this ip address over to ISA 2006, but cannot find where I can tell ISA from now on this is your new default external ip address.

I have done some searching and see you cant have two default external ip addresses, I only want one - but i want to choose which one.

Can this be done,
Question by:kaitiaki0123
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LVL 51

Expert Comment

by:Keith Alabaster
ID: 33707056
The ip address assigned to the external nic in the normal entry place will be the ip address used for outgoing NAT.

Author Comment

ID: 33707098
Is that on the server or ISA itself? We have about 5 external ip addresses and the ip first ip address in the tcp/ip settings isn't even the public address of ISA, it's the second one down under advanced.
LVL 51

Expert Comment

by:Keith Alabaster
ID: 33707940
Then change it round :)  Yes, on the ISA itself. ISA will use the one on the main tcpip page of the nic.
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Author Comment

ID: 33708968
Where on ISA do I change this?
LVL 51

Accepted Solution

Keith Alabaster earned 250 total points
ID: 33709182
not in ISA - is in the host OS of the server. Edit the tcpip ipv settings of the server.
Change the server ip address to the ip you want it to use for outbound traffic and add the current external ip address into the additional ip addresses section.


Author Closing Comment

ID: 33819483
I beleive that ISA just cannot do what I asked, and the only way to make the changes is via the OS

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