User Manual

Firewall
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5
Figure 5-28. NAT (Router mode)
NAT Setting — Enables NAT related settings.
• Network Address Translation – Enables the forwarding of TCP/UDP packets
through a NAT device.
• IPSec Pass Through – Enables tunnelling encrypted Internet Protocol Security
(IPSec) packets through a NAT device.
• PPTP Pass Through – Enables tunnelling Point-to-Point Tunneling Protocol
(PPTP) packets through a NAT device.
• L2TP Pass Through – Enables tunnelling Layer 2 Tunnelling Protocol (L2TP)
packets through a NAT device.
•SIP ALG – Allows SIP Application Layer Gateway (ALG) traversal filters to be used
to support address and port translation for certain application layer protocols.
• NetMeeting ALG – Allows NetMeeting ALG traversal filters to be used to support
address and port translation for certain application layer protocols.
• Window Messenger File Transfer ALG – Enables Window Messenger File
Transfer ALG to transmit packets through proxy servers.