[Gllug] [OT] Non Nat dsl router advice?

[Chris Bell]

On Mon 18 Oct, Ken Smith wrote:
> 
> Andy, I came across a D-Link ADSL modem a week or so ago that might suit
> you. The device connected to its Ethernet side gets the public IP address.
> No NAT or firewall or anything. So you could put a firewall Linux box there
> with GNUGK on it. I don't recall the type number but it will be on the
> D-Link site. I too have battled with H323 and its quite NAT hostile.
>  
> Ken - in nearby Riddlesdown

   I heard some time ago that an ADSL modem used with a standard BT line
should have an IP address, but that it did not need to be a routable
address, so the visible IP address can be allocated to the (firewall?) box
behind it. I have not tried to do that yet, but it is probably possible to
even have a firewall between the ADSL modem and the box which has the
official IP address, see the HOWTO on Bridge + Firewall + DSL Mini-HOWTO:
Bridging, Firewalls, and DSL connections

http://www.tldp.org/HOWTO/Bridge+Firewall+DSL-2.html

   It goes into great detail about what is required to make a transparent
bridge with firewall capabilities but without any visible IP address, but it
did not seem to match the information I found with Debian. I eventually
installed the package "bridge-utils" and found that I just had to enable it,
everything else was done! It is very difficult to break a firewall if you
can't see it.
   I see that there is another package in Debian Sarge (testing) br2684ctl
for configuruing RFC2684 ATM/Ethernet bridging.

-- 
Chris Bell

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