General discussion
October 7, 2002 at 07:40 AM
joseph moore

IIS5 Answering on Multple NICs

by joseph moore . Updated 23 years, 11 months ago

Machine: Win2KServer, SP3, with all recent patches, running on IBM Netfinity 5000.

IIS is installed and running (only FTP and WWW installed and configured). FTP is fine. WWW is the problem

The server has 2 NICs in it, both with different IP addresses (for the sake of argument, let’s say NIC#1 is 10.0.0.1 and NIC#2 is 10.0.0.2).
IIS WWW is “bound” to 10.0.0.1, port 80 only. For a screen snapshot of this window, go here:
http://www.horrorseek.com/horror/leeringclown/techrepublic/iis1.gif
(please remove any spaces)
(Yes, agan that is not the correct internal IP address; I am using a valid 10.x.x.x address)
The Advanced button reveals the same info. Go here for another screen snapshot:
http://www.horrorseek.com/horror/leeringclown/techrepublic/iis2.gif
(again, remove any spaces)

The problem is that IIS is answering all WWW requests on port 80 for BOTH IP addresses, not just the single one it is configured to use. I have verified this by using SamSpade and NetBrute, 2 tools that can expose the web server packet info. Both tools give me this info back from both IP addresses:

HTTP/1.1 200 OK
Server: Microsoft-IIS/5.0
Content-Location: http://10.254.253.230/Default.htm
Date: Mon, 07 Oct 2002 21:39:10 GMT
Content-Type: text/html

As you can see, IIS answered. Now, I need to have IIS stop answering on the 2nd NIC (10.0.0.2) for port 80, so I can install Lotus Domino and have IT answer on NIC2 port 80. But, we are not there yet.

Also, when you use a web browser to go to http://10.0.0.1 you get the default home page on my web site, as I would expect. On http://10.0.0.2 you get a message reading “No web site is configured at this address.”

I have gone into the Properties for the IIS server itself, and Edited the Master Properties. You cannot set the IP address there. I thought you could, but guess not.

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