ADSL Router supporting Multiple Public IP addresses

Unanswered Question
Apr 30th, 2009

Does Cisco have such an device and which one would it be?

I have a range of Public IP's on my ADSL line and want to host a range of different servers


I have this problem too.
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Jon Marshall Fri, 05/01/2009 - 07:43


Just to add to Collin's post. What you need is a router that supports NAT and pretty much all routers support NAT.

As an example lets say you have been allocated which means you have useable IP addresses of -> The ISP will use one of these for their upstream router so a common setup would be

LAN -> R1 (wan interface -> ( router -> Internet

So you now have ->

With these address you can host your servers. So lets say you have a server with a private address of and you want to present it to the Internet as

1) On R1 interface connecting to the subnet(s) where your servers reside

ip nat inside

2) On R1 interface connecting to ISP router -

ip nat outside

3) On R1

ip nat inside source static

4) Allow access to this server on specific ports with an access-list on the outside interface of R1 eg

access-list 101 permit tcp any host eq 80

5) Apply access-list

R1 WAN interface

ip access-group 101 in

That is a rough idea of the sort of thing you will need at a basic level.



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