Feature

Description

ALG

The application level gateway (ALG) feature is used to process application layer packets. ALG can work with NAT and ASPF to implement address translation, data connection detection and application layer status check. ALG configuration mainly involves the following task:

l      Configuring ALG

Rsh

Remote shell (Rsh) allows you to execute the internal and external commands provided by the operating system (OS) on a remote host that runs the Rsh daemon. Rsh configuration mainly involves the following task:

l      Configuring Rsh

SSH2.0

Secure Shell (SSH) offers an approach to securely logging in to a remote device, and provides security and strong authentication. SSH2.0 configuration involves mainly the following tasks:

l      Configuring SSH server

l      Configuring SSH client

l      Configuring SSH client software

SSL

Secure Sockets Layer (SSL) is a security protocol providing secure connection service for TCP-based application layer protocols. SSL configuration involves mainly the following tasks:

l      Configuring an SSL server policy

l      Configuring an SSL client policy

Web filtering

The Web filtering function can prevent internal users from accessing unauthorized websites and block Java applets and ActiveX objects from web pages. Web filtering configuration involves mainly the following tasks:

l      Configuring URL address filtering:

l      Configuring IP address support under URL address filtering

l      Configuring URL parameter filtering

l      Configuring Java blocking

l      Configuring ActiveX blocking.