"Albert D'Amanda" <[EMAIL PROTECTED]> writes: > Yes indeed > > My ISP, Comcast.net , has built in software coding at the server to > prevent two computers sharing one IP address > > I believe that their System guys can even block the use of any 2nd > computer no matter which router, etc that is being used.
The thing is you don't want a simple router- you want a network address translation (NAT) router. This recieves TCP/IP (internet style) packets from your computers, puts its own IP address on it, and sends it upstream. The response comes back, it remembers where the original packet came from, and it sends it to that address. I recommend something like this even if only one computer is used- regular attacks just bounce off of it, because it can't route packets into the private network (well, I could tell mine how, but by default it doesn't). If everyone had one of these, Code Red and most other worms and viruses wouldn't have worked. Your cable modem might remember the MAC (the unique ethernet hardware address) of the machine it first talked with. A reset should clear it, or most NAT routers can "clone" the address of a computer hooked up to it. It is possible to tell when different computers are sharing an address even with NAT, but it's not easy, and it doesn't work with all operating systems (I think OpenBSD makes it essentially impossible to tell). I haven't heard of any providers using this technology, and I'd expect to have heard if one were (it'd make the front page of SlashDot.org, easy!). Here are some more parens, in case I left any out: (((())))()(()(())) -- Dana [EMAIL PROTECTED] -- G-List is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- We have Apple Refurbished Monitors in stock! | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> G-List list info: <http://lowendmac.com/lists/g-list.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/g-list%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
