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New Member

NAT 877 mutilpe devices

Hi,

I have a Cisco 877 DSL Router. My connection has two static IP addresses. Can I set up NAT on each Public IP address to two devices on MY LAN using the 877?

Thanking you in advance

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4 REPLIES
VIP Purple

Re: NAT 877 mutilpe devices

Hello,

are you talking about two internal IP addresses being able to use two public IP addresses ?

Something like:

ip nat inside source static 10.10.10.1 212.136.1.1

ip nat inside source static 10.10.10.2 212.136.1.2

This would map each of your internal addresses to one of the public addresses.

As an alternative, you could put both public addresses in a pool:

ip nat pool PUBLIC 212.136.1.1 212.136.1.2 netmask 255.255.255.252

ip nat inside source list 1 pool PUBLIC

access-list 1 permit host 10.10.10.1

access-list 1 permit host 10.10.10.2

Is that what you are looking for ?

Regards,

GP

New Member

Re: NAT 877 mutilpe devices

Hi,

thnaks for the help.

MY DSL router has a single DSL interface, which is picking up the first available IP address assigned to the site.

I know how to set up NAT for a single interface i.e. I have one Public IP address going to internal address no problem.

DO I need to do anything special when one Interface has two addresses?

The example above makes sense is it as simple as that?

Purple

Re: NAT 877 mutilpe devices

You certainly can.. Try this:

interface fastethernet

ip nat inside

!

interface atm.

ip nat outside

!

ip nat inside source static

ip nat inside source static

Hope that helps - pls rate the post if it does.

Regards,

Paresh.

Purple

Re: NAT 877 mutilpe devices

Hi,

It is indeed as simple as that. As long as the ISP is routing both of those addresses to your link, the above will work.

Hope that helps - pls rate the post if it does.

Regards,

Paresh.

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