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ADSL setup / IP addresses

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ADSL setup / IP addresses

We've just activated adsl self-install.
We want to connect the service to our network using proxy server.
I know we need a 2nd NIC, but not sure on the IP addressing.
Our internal IP addressing is 10.0.0.x
Our ADSL IP's are 212.x.x.x.
Our router needs IP 212.x.x.1 for example.
What should the 2nd NIC IP be?
Do we need to change the internal IP's?
1 REPLY
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RE: ADSL setup / IP addresses

> We've just activated adsl self-install.
> We want to connect the service to our network using proxy server.
> I know we need a 2nd NIC, but not sure on the IP addressing.
Not necessarily... Do you really need (or want) a proxy?
If you buy an ethernet ADSL router which does NAT (Network Address Translation) - and most will, then it will map your internal 10.0.0.x network onto your valid external IP address(es). You can set up port forwarding on the router to handle services like incoming SMTP mail, etc. You then don't need a proxy, or any additional NIC's.
My Alcatel SpeedTouch 510 does this (and much more - firewalling, DHCP, DNS forwarding, etc), and happily serves up IP to our home network. Its version on NAT is called NAPT (Network Address and Port Translation)
> Our internal IP addressing is 10.0.0.x
> Our ADSL IP's are 212.x.x.x.
> Our router needs IP 212.x.x.1 for example.
Yep - for its external (ADSL) IP address. It will also have an "internal" ip address, I think the alcatel is 10.0.0.138 (I changed mine).
> What should the 2nd NIC IP be?
You don't actually need one...
> Do we need to change the internal IP's?
Nope, but you will want to change your internal network's "default gateway" (and DNS servers) to point to the internal IP address of your router.

Hope that helps a bit!
Cheers,
Marc