Setting up both Cable and ADSL connections for use on one PC

Noggo · 06-04-2008, 11:53

Hi,

Been having problems with XL cable connection for ages now and getting just a little racked (polite work something else) off with how long VM are taking to resolve the issues. So with the money I'm saving from reduced XL monthly charges and a good will payment, I'm looking at getting ADSL installed on 1 month rolling contract for my on-line gaming.

Is it possible to run a stand alone PC with both connections coming into it, routing TCP down the cable conn and UDP down the ADSL conn.

Or do I need to setup a server to do the routing for me (which isn't a problem as I've got a spare PC to hand).

What's the best route to go down + how do I do it.

TIA for any replies,

tweetiepooh · 06-04-2008, 18:10

If you've got a spare PC then fit that with 3 NIC's. Then plug one to the ADSL and one to the SACM, this is the WAN side. The other is the LANside to your PC. Now install something that can do the routing for you. There is probably as Linux distro already available for that purpose that can also prevent access between the 2 WAN ports.

One issue is what networks the 2 modem devices want on their LAN side as it is often very similar. They probably want to use 192.168.x.0/24 and hopefully the x is different. If you are using a router for the ADSL side then that may be configured to something else, similarly on the cable side.

You are then aiming for something like

Code:

PC ---- router PC ------ (router) ---- SACM
                 \----- ADSL router

If you put a firewall on the router PC you can build in a proper DMZ if the routers have more than 1 LAN port on too. Or add a forth NIC to the router PC.

Code:

PC --------  router PC -------- ADSL router ------- BT
                 |   \-------- Cable router ------- VM
            DMZ device

Put a switch where your PC is and then you can have multiple devices
sharing the setup.

Steve-o||[^] · 06-04-2008, 22:00

Pretty much what tweetiepooh said.

Though, I wouldn't go with having routers feeding the 'routing system' which then routes again into your LAN. If you feed the 'routing system' with the modem feeds (NAT off, please) and have the routing done by the 'routing system' instead.

You can then configure it for NAT, setup a firewall, install a DHCP service, etc, etc. For the issue of which service to use, you could have a play about with the routing (routing known IP's of game servers you play on out of the interface connected to the ADSL, for example).