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3.6.4 Passthrough
Allow the broadband router correctly pass though the NAT gateway.
[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):
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.
If the FTP Server is using a non-Standard FTP port number, this can prevent FTP
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