Cisco WRVS4400N Administration Guide - Page 91

Setting Up and Configuring the WRVS4400N Wireless-N Router Configuring Firewall Settings 5 Configuring IP Based ACL The Firewall > IP Based ACL window displays a summary of the configured IP-based access control list. The access list restricts traffic going through the router either from WAN or LAN port. There are two ways to restrict data traffic. You can block specific types of traffic according to your ACL definitions. Or you can allow only specific types of traffic according to your ACL definition. The ACL rules are read according to their priority. If there is a match for a packet, the action is taken and the following lower priority rules are not checked against this packet. NOTE The higher the number of rules that need to be checked against packets, the lower the throughput. Use ACL rules with caution. There are two default rules in the table that cannot be deleted. The first rule allows all traffic coming in from LAN port to pass the router. The second rule allows all traffic coming in from WAN port. These two rules have the lowest priority, so without adding any user defined rules, all the packets can be passed through from both WAN and LAN sides. The rule is enabled if the Enable button is checked and if the date and time are matched. If any of the conditions are not met, the rule is not used to check against packets. Cisco WRVS4400N Wireless-N Gigabit Security Router with VPN Administration Guide 91