Windows XP pro acts as miniserver, i.e. 2 network.
One with a white IP
The second looks at the LAN.
All traffic goes through that machine. On the machine prosrochena group of ports for access to video recorders (video surveillance on-site) to nachalstvo can always see the progress of the works.
The problem is that the traffic when you browse cameras is killing the channel to zero and work in the Internet from the local area anymore.
How to limit incoming traffic?
Yes, I know it's better to leave nix and there to expose, but it is necessary to solve this situation