In the last two days, I have been having some really strange issues. I use pppoe over wireless to my customers, which is natted private ip's. off and on, I have been getting the windows error that my ip is in use. When I try and change it, the new one is also in use. It doesnt matter, I can use "any" subnet and "any" IP, it is always in use already. The network takes a hit when this happens, things don't work and it really acts odd. Wondering if anyone else has seen this, and where it might originate from. Is there any firewall rules I should add, as I have none except the nat.

Thank you for you help with this matter.