[nzlug] trying to get a real world IP address on a linux firewall using an ADSL router

[Mark Foster]

On Fri, 22 Dec 2006, Glen Ogilvie wrote:

> Hi,
>
> I would like to configure my 4 port ADSL router to not do the standard nat /
> dhcp, but to actually just work as a modem, and allow my linux firewall to
> have the real world IP address.
>
> Has anyone in NZ managed to do this?
>

In my experience - no.
PPPoA assigns the real world IP address to the device doing the connecting 
- its a standalone appliance, not a 'modem'.

If you have an Internal DSL Modem (they do exist, although are not hugely 
common these days) you dont have this issue.

Otherwise you need to look for a 'DMZ' type functionality where you end up 
with an 'all ports are NAT'd' type configuration.

Welcome to the world of PPPoA and New Zealand ADSL.
I live with a Double-NAT situation and pinholes for services I want 
forwarded through from outside. I actually kinda like the 'virtual 
firewall' this creates, though it is kinda blind.

If you havn't seen it already, the ADSL Mailing list Archives 
(http://www.unixathome.org/adsl) may have some info of use.

Regards
Mark.