My server chains LANs, direct and telecommunication chaining once, In addition, my LAN has ddn special lines directly, the export of telecommunications gets involved by way of lan, There is a question like this, it is when the computer surfing the Net under looks for this server, ( order ping) always go to telecommunications, turn around from ddn special line again, excuse me, How could avoid this question? ? How should this server be disposed ? Spend I it is proxy act as agent, can only bind one one net card. If dispose this server into a router, OK? ( wrap up rip of those pings and all hit back), if can have, how to do?