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I've got a Netgear dg834g, I'm trying to use it as NAT enabled router.

So it's not connected to ADSL port directly it's connected to my router.

  • DHCP is enabled on my router
  • NAT is enabled in Netgear dg834g

But Netgear never gets an IP address from my router. I couldn't find an option in NetGear to set a static IP (there is one static IP option, but it's for ADSL port not LAN port).

All I want is use this netgear to setup a new subnet which is isolated from my network. But it works either as a switch (all computers behind it behaves like directly connected to main router) or it does not connect to the main router at all.

Is there anyway to do it?

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4 Answers

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I don't think it is possible to do what you want with the router, as the ADSL port is the WAN port on this router. This is the interface that the netgear will be using to do the NATing.

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If you want it to create a subnet then you should plug the WAN port on the Linksys into a port on your main router. Then it will have one interface on each of the networks and can act as an actual router between the two subnets. At that point you can set a static IP on the WAN port and DHCP to hand out IP addresses on it's LAN ports. Just make sure that the two subnets are actually different (have different network portions of the IP addresses), and note that if you want computers on the "outer" subnet to be able to contact the "inner" subnet they need specific routing statements telling them where that subnet resides (i.e. route to inner subnet via static IP of WAN port on linksys router).

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There is no specific WAN port there are only 4 ports and all of them are LAN ports. – Karma Soone Jul 6 '09 at 14:36
Documentation - kb.netgear.com/app/products/model/a_id/2325 – Karma Soone Jul 6 '09 at 14:38
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Sorry, I didn't look up the actual model number. That isn't a router, it is a firewall modem, so it can only serve as a router to connect a subnet to an ADSL connection. If you want to create a separate ethernet subnet you need to get an ethernet router. – Catherine MacInnes Jul 6 '09 at 15:55
It is a router. His problem is that the WAN interface is an RJ-11 port. – MDMarra Sep 5 '09 at 5:37
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----LAN2--(LAN IF)Netgear(WAN IF)----LAN1---(LAN IF)ROUTER(WAN IF)---INTERNET
You should go as Catherine MacInnes said. With such a setup i would do static adressing of the WAN interface of the netgear router.

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There is no specific WAN port there are only 4 ports and all of them are LAN ports. - kb.netgear.com/app/products/model/a_id/2325 – Karma Soone Jul 6 '09 at 14:40
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Can't be done the way you are describing. The telephone jack (RJ-11) is the WAN port on that device. If your other router is a standard router with an RJ-45 connection for the WAN port, you could switch them, plugging the ADSL directly into this one and plugging a connection into the original router and just reconfiguring each to serve their specific subnets. If both routers have their WAN link as RJ-11 you may be out of luck.

If you have a space PC and a few NICs, you should check out pfSense. It is a firewall/router/etc FreeBSD distribution that can support as many interfaces (networks/subnets) as you have NICs in the PC it runs on.

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