102D-Link DSL-2745 Wireless N300 ADSL2+ Modem Router User Manual
Section 4 - Conguration
NAT ALG
ALG CONFIGURATION
Check or un-check the boxes next to the protocols to enable or disable them.
Click Apply Changes when you are done.
Application Level Gateways (ALGs) are security components that enhance the
rewall and NAT support of this router to seamlessly support application layer
protocols. In some cases enabling the ALG will allow the rewall to use dynamic
ephemeral TCP/ UDP ports to communicate with the known ports a particular
client application (such as H.323 or RTSP) requires, without which the admin
would have to open large number of ports to accomplish the same support.
Because the ALG understands the protocol used by the specic application
that it supports, it is a very secure and ecient way of introducing support for
client applications through the router’s rewall.
To Next Page
Loading...
