Although LiveCDserver is Linux with server function, if you do not have firewall, you can have LiveCDserver as your firewall.

Major functions:

1. NAT server can be IP sharer so that employees can connect to the Internet at the same time.
2. Prevention of PING protects outside PING from accessing to mainframe's IP and avoiding attack of PING OF DEATH.
3. Blocking special sources or having control on ports and preventing specific outside IP from connecting to specific port number of the mainframe.
4. Port guidance enables other specific port numbers of other servers to have outside mainframes to access other inside mainframes.