[cobalt-security] newbie question about dhcp/bootp server..

[Bryan Housel <bryan@xxxxxxxxxxxxxxx>]

I got a call from my ISP complaining that my raq3 is running a dhcp server 
which is interfering with their network, and they want me to disable it.. 
I didn't realize that the raqs had this service enabled, and i'm not sure 
how to check to see if it is running, or how to disable it (ps -ef didnt 
turn up anything really suspicious).. I ran a port scanner on my machine 
and it did turn up these:

67/tcp     filtered    bootps                  
68/tcp     filtered    bootpc

1. Is this normal
2. could it cause problems with other machines on their network
3. if so, how do i turn it off?

TIA,
Bryan