Setting up a Netgear FVS336G with BT and Plusnet Broadband

Posted on Posted in Techy

We recently got a Netgear FVS336G to run our network at work. Setting it up was a little bit of pain, and I couldn’t find any useful forum posts to help, so here’s some info.

Hardware

Netgear FVS336G Dual Wan Firewall (router)

2Wire BT2700HGV Modem (BT)

Netgear DG834 Modem (Plusnet – the supplied Tehcnicolour TG582n isn’t great)

Setup

The first hurdle was that the FVS336G only supports PPPoE internet connections if you use it to login. I hadn’t noticed, but PPPoE is not the same as PPPoA, and our standard broadband connections (not fibre – hence the need for two) are PPPoA. This means that you can’t use the Netgear box to log into the connections.

The forums all mentioned about putting the modems into bridge mode, or static routing. I didn’t use either of these methods.

Instead, I set up the internet connections on each modem as if they were standalone connections. I set them to use the IP range 10.0.1.x (WAN1) and 10.0.2.x (WAN2). This is to avoid IP conflicts with the Netgear box on 192.168.1.x

I then left DHCP on, but set the range to x.x.x.100 to x.x.x.200. If the modem has WiFi, you can leave it on as a guest network so that people can connect via WiFi but not get access to your local network (or you can turn it off).

I set the Netgear box to not log in, but to connect to the modem directly, and asked it to use the IP outside the DHCP range so that it will definitely not get conflicted.

WAN1 SetupThis should allow the Netgear to connect to both modems easily. Although DHCP is activated on both modems, the Netgear router will handle DHCP for devices connected to it, so they will all get an IP in the range 192.168.1.x, unless they’re connected via WiFi directly to one of the modems.

Ideal Scenario

It would probably be a step better to have each modem in bridge mode (called DMZPlus mode on the 2Wire 2700 and other things in other places), where it essentially just acts as a modem, and passes the external WAN IP directly to the Netgear router. However, I couldn’t get this to work properly on either modem and got bored trying.

Issues

The only issues I’ve noticed so far is that we’re using the dual WAN connections in load balancing mode, and whenever you make any changes to either connection setup in the Netgear admin, it disconnects from both of them and takes a minute or two to reconnect which is slightly annoying. If you make changes to either connection directly on the modem, I think it just handles it.

Hopefully this will save you some headache if you’re trying to do the same thing.

One thought on “Setting up a Netgear FVS336G with BT and Plusnet Broadband

  1. You probably already know this but the Netgear DG834 can be put in ‘full bridge mode’ as follows;

    ip4address/setup.cgi?next_file=mode.htm

    click on the pull down and choose modem only. Save and reboot. That’s it. You can now connect to your router / firewall etc and ask it to do PPPoE dial in with your isp un/pw

    I did this recently with a pfSense firewall as router and it works a treat. You are essentially taking all the work of routing / firewalling etc off the DG834 so its cpu gets to run a bit lighter and cooler.

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