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[_] ADSL modem & multiple WAN IPs

Neil Fraser nfraser at nadtechnology.co.uk
Wed May 30 22:10:54 BST 2007

> 
> We've got an ADSL backup line, and I've just got a small 
> block of IPs from Plusnet (who really did have excellent 
> customer service). What I want is to create a network where I 
> can plug in a piece of kit, give it one of these public, 
> routable IPs, and it's on the internet. I currently have a 
> Dlink DSL-300T.
> 
> However, although this is possible with most ADSL modems for 
> a *single* IP (i.e. just switch off the NAT), it seems that 
> multiple IP addresses present a problem - the modem only 
> thinks it's getting one WAN address, and that's all it's 
> prepared to handle. I could just put the modem into "bridge" 
> mode, but then any connected device has to use PPPoE to 
> authenticate, which isn't fun. Is my understanding of that correct?
> 
> I also don't want to use NAT at all, not even "static" nat 
> (at least, not
> visibly) - for various reasons, not least of which is I like 
> servers having the IP address they have in the real world.
> 
> So, anyone know of any hardware which will pass-through 
> multiple routable IPs from an ADSL line, without me building 
> a *nix box with an ADSL card in it (or putting two routers 
> back-to-back and double-natting)?
> 

Try a Vigor 2600 or 2800 - ecellent bits of kit.

HTH

Neil