[Nottingham] Connecting router to Virgin/NTL cable

[Aritra Dalal]

seems quite strange, although the only thing i'd say, is make sure that the
internet configuration is set to DHCP mode, and although it isn't required
to open a port from a router, DHCP does require the use of port 67 and 68.

What I would suggest is if you tried to put in your old router's MAC address
into the new one and see if that improves things.

On 20 February 2010 11:27, James of the family Moore <
jmthelostpacket at googlemail.com> wrote:

> not heard of the port 68 thing - that isn't normal*. Usually one would
> run the modem to the primary PC to get an IP, then connect the modem
> to the router's WAN port, dive into the console and set the MAC
> address - which is as you say, the router clones the MAC address of
> the PC interface you're using and spoofs the modem into thinking it's
> still connected to that one PC. On an established working setup this
> shouldn't usually be necessary either, you should just be able to
> switch out the old router for the new and carry on as normal, but
> sometimes there's occasion to clone the MAC address.
>
> *some of the Surfboard modem hacks I've come across /do/ use port 68
> for console access, I'm not particularly keen on these as Port 68 is
> reserved for the bootstrap protocol client (RFC951) hence /shouldn't/
> be used for console applications especially for configuring modems!
>
> On 2/20/10, Dave <daveluff at ntlworld.com> wrote:
> > Hi folks,
> >
> > I've previously been running ntlworld (now virgin) cable with a small
> > £20 dlink (DI-604) NAT router behind a several-years-old ntl
> > cablemodem.  I recall that when I installed it (the router) I had to add
> > a rule opening port 68 to the outside or it wouldn't obtain an IP
> > address from NTL.
> >
> > I've now bought a newer dlink router (DIR-300) that also has wireless,
> > but I can't seem to get it to obtain an IP address.  I've tried opening
> > port 68 again, still no joy.  Unfortunately I've set and lost the admin
> > password to the old router so I can't check exactly what I did that
> > worked!  Any advice?  A lot of the group must have connected a router
> > behind an ntl cablemodem at some point - is it normal to have to open
> > port 68?  I clicked "clone MAC address" but this I think just clones the
> > MAC address of the PC I used to configure it - is that necessary /
> correct?
> >
> > Thanks in advance for any advice,
> > Cheers - Dave
> >
> > _______________________________________________
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> > Nottingham at mailman.lug.org.uk
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> >
>
>
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