Hi! > > If you want to change the MAC address of a package without repackaging it, > > you will have to write the patch yourself. And it is not trivial. > > You have to change the MAC address of outgoing frames (trivial) > > Yes, I belive this to be trivial. However, as I have no deep understanding > of networking and newer browsed any kernel source before, I expect it to > be a hard time finding the right spot to implement it ;-) > > > and of incoming ones (tough). > > Do I realy need to do this? And why in that case?
The response will be send back to the source of the original package. Since your linux box seems to be the source for every package, it will receive every response. And what do you do with unwanted letters? :) > > Set you linux box up as a router, thus repackaging all IP packets. With > > squid and danted (socks) properly configured, the other boxes can access the > > internet and you have a single firewall for every box. > > Sorry for this newbe level ;-) But what deside if a packege is past thru > 'as is' or properly repackaged? Look for ISO-OSI. An IP package from one computer to another one in the same subnet will be delivered to layer 2 (ethernet, token ring, ...) on the source computer. Ethernet will usually add a header with the MAC address of the destination computer and send it across the wire. The destination computer will strip it from the ethernet header and deliver it to its IP stack for further processing. A package to a computer on a distant subnet will be send to the router in the described fashion, the router strips the ethernet header, delivers it to the ip stack, the routing tables will determine the right interface and destination computer, to the next layer 2 (possibly VGAnylan, ...) and so on. Every time, the IP package will receive a new ethernet header and your cablemodem will only see one MAC address. > I did belive everything pasing the kernel whas repackaged, but then stuff > like ARP must contain the (in my case) 'wrong' MAC-adress somewhere > else :-( I am not very sure about arp-proxy, but a bridge will forward any package without touching it. I hope, this helps. -- A loving atmosphere in your home is the foundation for you life.
