User`s manual

- 28 -
[VPN]
PPTP Passthrough: PPTP is a protocol that allows corporations to extend their own corporate network
through private “tunnels” over the public Internet. Enable/Disable this protocol verification.
IPSec Passthrough: IPSec is a framework for a set of protocols for security at the network or packet
processing layer of network verification.
L2TP Passthrough: L2TP is an extension to the Point-to-Point Protocol, which is an important component
for VPNs. VPNs allow users and telecommuters to connect to their corporate intranets or extranets.
[FTP]
Non-Standard FTP Port (0-65535): If the FTP Server is using a non-Standard FTP port number, this can
prevent FTP data connections from being established.
3.6.5 DMZ
If you have a client PC that cannot run Internet application properly from behind the NAT firewall or after
configuring the Special Applications function, then you can open the client up to unrestricted two-way
Internet access.
Enter the IP address of a DMZ host to this screen. Adding a client to the DMZ (Demilitarized Zone) may
expose your local network to a variety of security risks, so only use this option as a last resort.