2 NIC's on the same network and ISA server

  • Thread starter Thread starter Netmasker
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Netmasker

I want to run ISA server on my Windows 2000 Server. In order to use the ISA
Server Firewall and not only the ISA Proxy, two network adapters are
required (and I installed them).
The problem is (if there is one) that my Server is not connected directly to
the internet but it uses a Router with an IP address like: 10.1.1.1 and the
Router will be the one that will provide internet access (using NAT).
My LAN, including my Server and Router connect to a hub on the same network:
10.1.1.0/24 and this is the only network that the router will give internet
access!!

So I am thinking of setting up the two network adapters on the Server with
IP addresses of the same network, e.g.
Internal interface IP: 10.1.1.2
External interface IP: 10.1.1.3 (with NetBios disabled and the gateway to be
10.1.1.1).

What problems this configuration will cause
a) on Server networking functionality ?
b) on ISA Server functionality ??

Can anyone propose any other solution in order to use ISA server Firewall
features ???
(p.s. Router configuration can not be changed)

Thanks in advance
 
You will have to put your internal nic on a different IP-range than your
external nic.
So something like IP 192.168.0.2, gateway blanc, DNS 192.168.0.2
External nic10.1.1.3, gateway 10.1.1.1 (your router-IP), DNS 192.168.0.2
Check bindingorder and make sure that internal nic is on top.
In your DNS-server you put the ISP-DNS-numbers in the tab Forwarders.
In ISA you make sure that the external IP-range is NOT in the LAT.

Marina
 
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