Assign a second IP address to the Internal interface of the ISA Server 2004 firewall
We will add a second IP address to the Internal interface of the ISA Server 2004 firewall machine. This will allow us to publish the outbound SMTP relay on a different IP address than the inbound SMTP relay. While this is not required, it greatly simplifies tracking which relay is to be used by particular clients.
Perform the following steps to add a second IP address to the Internal interface of the ISA Server 2004 firewall machine:
1.At the ISA Server 2004 firewall machine, right click on My Network Places on the desktop and click Properties.
2.In the Network Connections window, right click the LAN interface and click Properties.
3.In the LAN Properties dialog box, scroll through the This connection uses the following items list and double click on Internet Protocol (TCP/IP).
4.In the Internet Protocol (TCP/IP) Properties dialog box, click the Advanced button.
5.In the Advanced TCP/IP Settings dialog box, click the IP Settings tab. In the IP addresses frame, click Add.
6.In the TCP/IP Address dialog box, enter 10.0.0.10 in the IP address text box. Enter 255.255.255.0 in the Subnet mask text box. Click Add.
7.The IP address 10.0.0.10 now appears second in the list of IP addresses. Click OK.
8.Click OK in the Internet Protocol (TCP/IP) Properties dialog box.
9.Click OK in the LAN Properties dialog box.
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