Multiple IP Address and ISA 2004

[anthonymeluso]

Ok this is just a theory question rather then something specific. I own 8 static IP address from my ISP and I will soon be using the Cisco 1721 router. I don't want this router to perform nat inisde the LAN nor do I want it to perform any firewall fucntions.

All I really need to know is if you can setup the local port of the router with one of those static ips and then assign the other 7 ips to the external nic on the ISA server. Also if those 7 static ip's will be visiable from the net. Is there any configuration that will need to be done to the router to get this to work?

Thanks

Anthony

 

[lambent]

This can be done and you need to set a default route on the router using the ISP IP address as the next hop IP.

 

[anthonymeluso]

In other words I would need to setup a default gateway for the Internal port of the router to point to the ISP IP address, right?

 

[lambent]

the default route is a global command, a little bit different from setting gateways on NICs, but same function.

Imagine it's "route add" in Unix or Windows...

There're a few ways to configure default route, but the most commonly used command is like this:

ip route 0.0.0.0 0.0.0.0 <next hop IP address>

where the next hop IP address should be the IP address on the ISP side of your WAN

 

[anthonymeluso]

Well that makes sense to me. Thanks for all the help.


Anthony