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ADSL Router supporting Multiple Public IP addresses

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

Ta

2 REPLIES

Re: ADSL Router supporting Multiple Public IP addresses

Any router can do this. I personally use an 877.

Hall of Fame Super Blue

Re: ADSL Router supporting Multiple Public IP addresses

Stuart

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 195.17.17.0/28 which means you have useable IP addresses of 195.17.17.1 -> 195.17.17.14. The ISP will use one of these for their upstream router so a common setup would be

LAN -> R1 (wan interface 195.17.17.2/28) -> ( 195.17.17.1/28)ISP router -> Internet

So you now have 195.17.17.3 -> 195.17.17.14

With these address you can host your servers. So lets say you have a server with a private address of 192.168.5.10 and you want to present it to the Internet as 195.17.17.3

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 192.168.5.10 195.17.17.3

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 195.17.17.3 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.

Jon

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