On Sun, 2003-10-26 at 19:47, Chris I wrote: > Hi. > > I, and many others at my school are having a problem with (at least) > one person running a DHCP server on their laptops. People often get > invalid addresses due to this and cannot (easily) access network > resources. It's so far been fairly hard to track down this individual, > so we can't disable the server. > > Short from trying harder to find him and kicking him in the shins, can > anybody think of a way to block dhcp servers, or to specify which is > allowed to be used. I've tried ip and mac filtering in iptables, but it > doesnt seem to be effective.
The dhcp client stores the IP address of the server it received the IP address from. In Windows - do ipconfig /all and look for DHCP Server In Linux - look in /etc/dhcpc for an *.info file for the interface, in this file look for DHCPSID. Hopefully the IP can lead you to your culpurit. If the IP itself is not helpful, find out the MAC address associated with it and start checking to see where the MAC Address is located (this will depend on you network gear) HTH, Steve -- [EMAIL PROTECTED] mailing list
