Cable Forum - View Single Post - Help request: configuring a DD-WRT router with VM cable?

christopherw · 25-06-2007, 23:42

This is doing my nut in.

I'm a new VM subscriber on XL, and have a (crap) Scientific Atlanta EPC2100R2 cable modem. When it was first set up, I temporarily plugged my laptop into the router's (only) ethernet socket, only to subsequently realise that of course, VM has registered my laptop's ethernet MAC as the only allowed device on the network.

However, I have more than one PC I want to use - simultaneously - on the network, and my housemates are in a similar situation (we all pay, so we all get to use I guess!) I have a Linksys WRT54GL router running the open-source DD-WRT firmware - which has worked beautifully for the past year as a simple switch with our Be* service (we switched because our phone line will only give us just under 10mb whereas Brum is getting 20Mb in July).

However, whatever I try, once I've cloned the MAC address of my laptop onto the DD-WRT router (to enable it to access the network), I can only get the router to be assigned an IP from Telewest - I can make it pass on DNS information so computers can resolve IP addresses, but traceroutes don't work and for some reason I can't make the router transparently pass on outgoing and incoming data to the SciAtl router (the DD-WRT tries to tell any machines connected to it to use itself as the default gateway, so of course any requests for web pages or anything else just fails).

Is there anybody around here who has experience setting up DD-WRT routers to work with VM service? I'm really struggling to make it work here, and it's a bit of a problem because if I can't get it to work, nobody else in the house has Internet access! Bit of a pain (and I get an earful from all 5 of my other housemates).

Is there something I'm missing in the router config? All I've done is cloned the MAC address to make it work on the network, and set the DD-WRT router as a DHCP server because the Scientific Atlanta doesn't seem to have any kind of routing capabilities and directly assigns the machine plugged into the ethernet socket with the public-facing IP address of the VM connection as seen by the greater Internet. Without a PC plugged into the modem, the modem won't even respond to ping requests via the Internet!!! How crap is that...

Please help! I'm going absolutely spare, and I SERIOUSLY doubt VM support will want anything to do with this kind of support. I'm hoping there's some sufficiently-techy bods who can help me out on this one, I really don't want to spend weeks and weeks tearing my hair out when I'm most likely missing something dead obvious which would take five clicks to fix!

Cheers in advance...

25-06-2007, 23:42	#1
christopherw Inactive Join Date: Jun 2007 Location: Birmingham, UK Age: 39 Services: Freeview, BBC iPlayer, Be* ADSL2+ (September 2006 - September 2007), VM XL 20Mb (July 2007 onwards) Posts: 67	Help request: configuring a DD-WRT router with VM cable? This is doing my nut in. I'm a new VM subscriber on XL, and have a (crap) Scientific Atlanta EPC2100R2 cable modem. When it was first set up, I temporarily plugged my laptop into the router's (only) ethernet socket, only to subsequently realise that of course, VM has registered my laptop's ethernet MAC as the only allowed device on the network. However, I have more than one PC I want to use - simultaneously - on the network, and my housemates are in a similar situation (we all pay, so we all get to use I guess!) I have a Linksys WRT54GL router running the open-source DD-WRT firmware - which has worked beautifully for the past year as a simple switch with our Be* service (we switched because our phone line will only give us just under 10mb whereas Brum is getting 20Mb in July). However, whatever I try, once I've cloned the MAC address of my laptop onto the DD-WRT router (to enable it to access the network), I can only get the router to be assigned an IP from Telewest - I can make it pass on DNS information so computers can resolve IP addresses, but traceroutes don't work and for some reason I can't make the router transparently pass on outgoing and incoming data to the SciAtl router (the DD-WRT tries to tell any machines connected to it to use itself as the default gateway, so of course any requests for web pages or anything else just fails). Is there anybody around here who has experience setting up DD-WRT routers to work with VM service? I'm really struggling to make it work here, and it's a bit of a problem because if I can't get it to work, nobody else in the house has Internet access! Bit of a pain (and I get an earful from all 5 of my other housemates). Is there something I'm missing in the router config? All I've done is cloned the MAC address to make it work on the network, and set the DD-WRT router as a DHCP server because the Scientific Atlanta doesn't seem to have any kind of routing capabilities and directly assigns the machine plugged into the ethernet socket with the public-facing IP address of the VM connection as seen by the greater Internet. Without a PC plugged into the modem, the modem won't even respond to ping requests via the Internet!!! How crap is that... Please help! I'm going absolutely spare, and I SERIOUSLY doubt VM support will want anything to do with this kind of support. I'm hoping there's some sufficiently-techy bods who can help me out on this one, I really don't want to spend weeks and weeks tearing my hair out when I'm most likely missing something dead obvious which would take five clicks to fix! Cheers in advance...