Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have a zyxel modem/router that is blocking my voip, and so I want to put it into bridge mode. When in bridge mode, I use my own router, and my voip works fine.

We have 5 static ip addresses at our office, and the zyxel has it's own sixth address. When I am in bridge mode, I am reported as using the zyxel specific ip and can't use the 5 statics that we have.

So the zyxel has something like when in bridge mode, but when in router mode, it has that same address as well as 5 address available to my servers. I use static ip addressing in my router (a linksys WRT54G2) and simply have copied the info from the zyxel before putting it into bridge mode.

How do I go about setting up the linksys so that those 5 static ip's (set in static by the servers behind the linksys) are seen when on the web as those ip's? (hosting my site and email, etc)

share|improve this question

NAT cannot be enabled on the Linksys router in bridge mode.

To achieve what you are asking you will need to cascade another router.

If your zyxel is in bridge mode, all you need to do is cascade the Linksys, and set it in NAT mode, your servers should be able to talk out to the net.

share|improve this answer
The zyxel is the one in bridge mode...not the linksys. – user277244 Feb 19 '14 at 21:14
In that case all you need to do is enable NAT on the Linksys, and everything should work for you. – Deesbek Feb 19 '14 at 21:15
Ya, I did that and it technically does work as the computers and servers do get onto the internet. But the 5 static ip's are not accessible outside the network (ie. on the internet). The current zyxel takes the nat-ted addresses and makes them publicly accessible as my 5 static ip's so I can host on those ip's. I want the linksys to do the same: Take those 5 ip's and make them publicly accessible via the internet. Someone on the internet should be able to type in one of those 5 ip's that are behind the linksys and access whatever sites and services I make available...right through the linksys – user277244 Feb 19 '14 at 21:21
You will need a static route on the zyxel pointing those IP's to the Linksys and then a NAT on the Linksys like I said. – Deesbek Feb 19 '14 at 21:31

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.