Does the ip address ever change with cable internet? I was just wondering because I thought it was supposed to be a dynamic ip, and mine has never changed for several months. It’s been unplugged and even serviced but no change.
Just curious.
I was under the impression that you have to change your MAC address to get a new IP Address 
But of course, there’s always the possibility that your ISP has your MAC address locked in, and if you change your MAC address you won’t even be able to connect!
But I don’t know, I haven’t had Dynamic in quite a while! 
I think you’re right on both counts, Andrew.
Normally, your MAC address is recorded by Citywest. You get the same IP if your MAC doesn’t change. The other side of this is that you usually can’t just change MACs without calling Citywest.
On the other hand, if the system is cleared out (rebooted, etc), then you might get a different IP next time.
Lots of “it depends” on there too…
[quote=“MiG”]
The other side of this is that you usually can’t just change MACs without calling Citywest.[/quote]
Wouldnt that mean you would not be able to hook up your new computer or NIC unless you talked to citywest?
Ive used MAC spoofing software alot ( allthough not on citywests cable service ) and have yet to be excluded from anything.
[quote=“Kid Havoc”]
Wouldnt that mean you would not be able to hook up your new computer or NIC unless you talked to citywest? [/quote]
This is one of the “it depends…”
Depending on the service, you may be allowed 2 IPs. So if you switch your router, it shouldn’t be a problem. Switch it again, and you might need to just call them and ask them to reset things for you. I’ve done this with Citywest on a couple of occasions with clients, and it’s super-quick and easy.
Well, if you’re spoofing the MAC, then no problem, right? They can’t tell that you’ve switched equipment.
Sure they can, if I connect to the net with a new system I won’t have the same spoof address. Most spoofs are system dependant, unless you use something that allows you to manually enter your original erroneous MAC address into your new system you’re going to get a new address once you run the program anyway.
Most routers allow you to manually enter a MAC address on the WAN side. So as far as Citywest is concerned, you’re using the exact same equipment.
Okay, that makes sense; since it would be your router that Citywest is interested in, not the BIA of your system. Just another reason to use a router I guess. As far as I know there would be no way they could get your system MAC through a router, right?
Yeah, MAC addresses are all layer 2 stuff, so not usually routable. So it won’t go past the router.