PLANET XRT-401D - Manual (Page 43)

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router will allow incoming packets for ports 2300-2400 and 47624 to be directed to that user.
Note: Only one LAN client can use a particular special application at a time.
3.4.4 ALG Settings
You can select applications that need “Application Layer Gateway” to support.
Parameters
Default Description
Enable
You can select to enable “Application Layer
Gateway ” of an application and then the router
will let that application correctly pass though the
NAT gateway.
Click <Apply> at the bottom of the screen to save the above configurations. You can now
configure other advance sections or start using the router (with the advance settings in place)
3.5 Firewall
XRT-401D provides extensive firewall protection by restricting connection parameters, thus
limiting the risk of hacker attack, and defending against a wide array of common Internet attacks.
However, for applications that require unrestricted access to the Internet, you can configure a
specific client/server as a Demilitarized Zone (DMZ).
Note: To enable the Firewall settings select Enable and click Apply