H.323; Standard Overview; Components - D-Link DFL-1600 User Manual

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After clicking ok, the configuration page goes to URL Filtering list.
Add HTTP URL:
General
Action: select Blacklist from the dropdown list.
URL: Enter an undesired address in the edit box.
Then click OK.
2. Service
– Adding the HTTP ALG into the corresponding service object.
Objects Services
Application Layer Gateway
ALG: select "http-activex" that has been created.
Then click OK.
18.4

H.323

18.4.1 H.323 Standard Overview
H.323 is a standard that is used for real-time audio, video and data
communication over packet-based networks (e.g. IP). It specifies the
components, protocols and procedures providing multimedia
communication.
H.323 is a standard approved by the International Telecommunication
Union to promote compatibility in video conference transmissions over IP
networks.
H.323 is considered to be the standard for interoperability in audio, video
and data transmissions as well as Internet phone and voice-over-IP (VoIP).
18.4.2 H.323 Components
The H.323 standard consists of these four main components:
Terminals
Gateways
Gatekeepers
Chapter 18. Application Layer Gateway (ALG)
HTTP:
D-Link Firewalls User's Guide