The Firewall Overview Screen - ZyXEL Communications SBG5500-A User Manual

Chapter 9 Firewall
Certification Authority
A Certification Authority (CA) issues certificates and guarantees the identity of each certificate owner.
There are commercial certification authorities like CyberTrust or VeriSign and government certification
authorities. The certification authority uses its private key to sign certificates. Anyone can then use the
certification authority's public key to verify the certificates. You can use the SBG to generate
certification requests that contain identifying information and public keys and then send the
certification requests to a certification authority.
AAA Servers Supported by the SBG
The following lists the types of authentication server the SBG supports.
• Local user database
The SBG uses the built-in local user database to authenticate administrative users logging into the SBG's
Web Configurator or network access users logging into the network through the SBG.
• RADIUS
RADIUS (Remote Authentication Dial-In User Service) authentication is a popular protocol used to
authenticate users by means of an external or built-in RADIUS server. RADIUS authentication allows you
to validate a large number of users from a central location.

9.2 The Firewall Overview Screen

Use this screen to enable the firewall on the SBG. Click Configuration > Firewall / Security > Firewall
Overview to display the General screen.
Figure 109 Configuration > Firewall / Security > Firewall Overview
Click the check box to activate the firewall feature on the SBG, then click Apply to save your changes.
You can also use the Firewall Flow to go through the SBG's firewall features.
SBG5500 Series User's Guide
140