Luigi Auriemma

Hello everybody,

Since 3-4 months ago i'm banned from gamespy.
I tried everything formatting windows changing local ip..
But i can't change my real IP my provider doesn't accept it.
My question is how do i fix this? i want to play games etc.. chat with player.

Greets Blasty,

well do u know why you were banned? if i were you i would try emailing gamespy see if they will unban or if they have forums post on there.

Yes i know why they banned my i tried the peerchat program from luigi lol.. but emailing doesn't help

well shit man sorry i guess i cant help :( lol were u banned for hacking there sir :P.

Lol , no problem i hope Luigi got something for me ^^

there is ever a solution to almost anything.
if they banned your IP you can avoid this using peerchat_irc + sockscap + Tor/Vidalia
then most depends also by the options you used in peerchat_irc, for example the -i one is almost necessary (use -i followed by a random number).
let me know if the sockscap+tor thing works and what options you have used in peerchat_irc

Using a proxy service is the best solution if you can't change your public IP. However, you might be able to change your public IP with a little work. If the service is DSL, try power cycling the modem/router for a few minutes as sethioz suggested.

I have cable internet, and when I need to change my dynamic IP all I have to do is change the MAC address in m0n0wall for the NIC that is connecting to my modem ;). After doing so, I am assigned a new public IP almost instantly without needing to reboot anything. It's quite nice. However, if anyone goes as far as to ban your entire subnet you might be forced to use the proxy method.

wht do you exactly mean by that ?
you dont mean change modem's mac right ?

For some reason my modem (a motorola sb5100) looks at the MAC of the NIC it's connecting to (my m0n0wall box)... and requests a new IP if the MAC changes. I don't know enough about cable modem technology to determine why it does this way. I assumed it would work the same way you mentioned... which is giving you an IP based on your modem's mac address, but I don't think it does.

The modem stores known MAC addresses it has connected to until it is reset (power cycled). I can see them by going to the modem's page at 192.168.100.1.

From what I have seen, it remembers up to about 10 MAC addresses before it will not remember any more. So if I try to spoof the mac 11 times, it will not give me a new IP, and I must use 1 of the other 10 until the modem is reset. I think the number is 10, but I would be wrong. I just remember not being able to get a new IP one day after spoofing... and having to reset the modem.

When I go back to one of the old MAC addresses, it uses the same IP it learned from before.

My friend has cable internet with another provider on the east coast, and he can change is IP on the fly the same way too (changing the MAC of the NIC on his computer, since he doesn't use a router). But unfortunately for him, he has to reset his modem as well or it won't give him a new IP. I think that is because he has a different modem that isn't 'remembering' mac addresses like my does.

Now that we bring this up, it has got me more interested :P. I'll have to make a post at dslreports and see if the guys over there know anything more about why it works this way.

confuses me lil bit, but well..
as i understand .. you connect to net in following way:
PC - modem - m0n0wall box - incoming cable
is that the case ?
and about your friend, he simply has it that way:
PC - modem - incoming cable
about that one. if you chagne PC's mac then it shouldnt give you new IP, but if you reboot modem then its not caused by MAC change anymore, it simply requests new ip every time you switch modem on.
for example i had cable modem.
PC - modem - incoming cable
when i changed PC's mac, nothing happend (exept small disconnect for a sec), but if i would have changed modem's MAC, then i would have lost net.
simply because cable modem works that way. ISP gives you your connection config by your modem's MAC. for example if you take your friend's modem and connect this to your pc then you have HIS connection, not yours. also usually this doesn't work, because all modems are assigned to a known hub. it works when you take like your neighbours mdoem (which is in same hub with yours).

so basically if some ISP is so stupid that they dont assign modems into hubs.. then if you would know somebody's modem's mac and change your mac into that one, you have free net :)

anyways i would really like to know if your ip changes if you simply unplug your modem and m0n0wall for at least 1 min.
if you have time you can also test what happens if you disable your network adapter for few mins and then enable.

oh yeah and..if i want new ip i just go to my router's (speedtouch 780WL) setting page 192.168.1.254 and disconnect for 1-5 seconds and then connect and i have new ip.

note that im not a networking expert and i im not 100% sure that it works this way. i just know the things ive tested myself.

My network is like so:

Computers -- Switch -- m0n0wall -- modem -- incoming cable

But I did a little searching on the subject, and here is what I came up with on what is probably happening:

When I power on my modem, 2 different mac addresses are used: The modem's and the CPE's (customer premises equipment).

- The modem's mac is obviously the mac address of the modem.
- The CPE mac is the MAC address of the device connecting to the modem, in my case the network interface card inside my m0n0wall box.

When the modem boots up, it sends it's mac address and gets a local IP to talk to the ISP's network (most likely something in the 10.x.x.x range). Once the modem is online, if will pass on any DHCP requests it gets to the ISP's dhcp server. So this means it will take the pass on the mac address of the CPE device (the m0n0wall box) to the ISP's dhcp server. If the modem is authorized, a public IP will be allowed for the CPE.

So to sum it all up, it appears the the modem's mac address is used as sort of like an 'authentication' to determine whether or not the customer is allowed to have a public IP. But to determine which IP it gets, it refers to the CPE's mac address.

Here is a screenshot of one of the pages on my modem: http://img296.imageshack.us/img296/8538 ... ardew6.jpg

Here is the thread I read to get an idea of what is going on: http://forums.whirlpool.net.au/forum-re ... 36878.html

How it works most likely depends on the equipment that your ISP uses. So the equipment and methods may be proprietary, or they may be a de facto standard, etc.

But as for your speedtouch 780WL, isn't this an ADSL modem/router built in one? If this is the case, ADSL is a completely different technology than cable. In ADSL, customers are typically authorized by a username/password rather than a MAC address. And when you power on/off the modem, you are usually given a new public IP address each time. This is why you aren't getting a new IP address when you change the MAC on your pc, because the MAC is not taken into considering for ADSL.

But lets assume it was a cable modem/router build in one (instead of ADSL modem/router). You would need to spoof the mac address on the router itself, not the individual PC, considering the router is what requests a public IP.

Hopefully that explains it a little bit. Let me know if I need to clarify anything :P ...I love talking about networking, it is my favorite subject.

This is most likely because your modem was only caching 1 CPE mac address, whereas mine is able to remember up to around 10 (as I mentioned before) before I needed to reset it. This is why when you power cycle the modem, you get a new ip, because it forgets about the old CPE Mac address and learns the new one, hence, a new IP.



The modem sees the MAC address of the CPE device (my m0n0wall box), remembers it, and passes on a DHCP request with that CPE mac address. Simple as that. The ISP doesn't need to talk directly to my m0n0wall box because the modem is there to do the talking.




Remember, when you power off the modem, the modem forgets everything it learned. So it is still going to make another DHCP request whether or not the CPE mac address changed. So when I power cycle the modem, it's going to re-learn the CPE mac address again, and request an IP address. However, the IP address will most likely remain the same because the lease has not expired on the ISPs side yet.




Yea, the ISP won't communicate directly to the CPE device based on the MAC address. But they can 'see' the mac address of the cpe device by checking out an arp table, or by looking at the dhcp requests.


I am going to look into this more and hopefully give a definitive answer on the subject. A lot of this cable modem information is just from what I have been reading online, or educated guesses based on what I have seen from experimenting with my own setup.