D-Link DWC-1000 User Manual 242
Section 8 - Security
ALGs
Path: Security > Firewall > ALGs
Application Level Gateways (ALGs) are security components that enhance the rewall and NAT support of this
controller 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
controller’s rewall.
1. Go to Security > Firewall > ALGs page.
2. Toggle the protocol(s) to ON that you want to allow through the controller.
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