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Refine Web Security Policies > Working with protocols
Working with protocols
Web Security Help | Web Security Solutions | Version 7.8.x
The Websense Master database includes protocol definitions used to filter Internet protocols other than HTTP, HTTPS and FTP. These definitions include Internet applications and data transfer methods such as those used for instant messaging, streaming media, file sharing, file transfer, Internet mail, and other network and database operations.
These protocol definitions can even be used to filter protocols or applications that bypass a firewall by tunneling through ports normally used by HTTP traffic. Instant messaging data, for example, can enter a network whose firewall blocks instant messaging protocols by tunneling through HTTP ports. Websense software accurately identifies these protocols, and filters them according to policies you configure.
 
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Note 
In Websense Web Filter and Websense Web Security deployments, Network Agent must be installed to enable protocol-based policy enforcement.
With Websense Web Security Gateway, it is possible to filter non-HTTP protocols that tunnel over HTTP ports without using Network Agent. See Tunneled protocol detection for more information.
In addition to using Websense-defined protocol definitions, you can define custom protocols. Custom protocol definitions can be based on IP addresses or port numbers, and can be edited.
To block traffic over a specific port, associate that port number with a custom protocol, and then assign that protocol a default action of Block.
To work with custom protocol definitions, go to Policy Management > Filter Components, and then click Protocols. See Editing custom protocols and Creating a custom protocol for details.

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Refine Web Security Policies > Working with protocols
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