Cisco SA520-K9 Administration Guide - Page 103

4 Firewall Configuration This chapter describes how to configure firewall rules that control outbound and inbound traffic and to specify other settings that protect your network. It includes the following sections: • Configuring Firewall Rules to Control Inbound and Outbound Traffic • Prioritizing Firewall Rules • Firewall Rule Configuration Examples • Using Other Tools to Prevent Attacks, Restrict Access, and Control Inbound Traffic • SIP To access the Firewall pages click Firewall from the Configuration Utility menu bar. Configuring Firewall Rules to Control Inbound and Outbound Traffic By default, your firewall prevents inbound access and allows all outbound access. If you want to allow some inbound access or prevent some outbound access, you must configure firewall rules. You can choose how and to whom the rules apply and can specify these settings: • Services or traffic types (examples: web browsing, VoIP, other standard services and also custom services that you define) • Direction of the traffic • Days of the week and times of day • Keywords in a domain name or on a URL of a web page • MAC addresses of devices Cisco SA500 Series Security Appliances Administration Guide 103