Date Added: Jan 2012
The main problem of NAC (Network Access Control) is the bypassing authentication using MAC/IP cheating. Hackers will change their MAC/IP address to the MAC/IP address of authenticated users. After that, they will be able to access network resources including internet link. This paper proposes a method for resolving this problem. The authors propose replacing NAC with VPN server and using 'Reverse VPN' method that VPN servers have to be placed between unauthenticated zone and the internal network (DHCP server will be placed on unauthenticated zone).