1-11 ACL OverviewThe following functions are added in V05.02.00 of the Switch 4500G series:z Applying an ACL for packet filtering and outputting packet filtering logs. For details, refer to ACLApplication for Packet Filtering.z The established keyword that is used to specify the TCP flags ACK and RST in advancedIPv4/IPv6 ACL rules. For details, refer to Configuring an Advanced IPv4 ACL and Configuring anAdvanced IPv6 ACL.In order to filter traffic, network devices use sets of rules, called access control lists (ACLs), to identifyand handle packets.When configuring ACLs, go to these chapters for information you are interested in:z ACL Overviewz IPv4 ACL Configurationz IPv6 ACL ConfigurationUnless otherwise stated, ACLs refer to both IPv4 ACLs and IPv6 ACLs throughout this document.Introduction to ACLIntroductionAs network scale and network traffic are increasingly growing, network security and bandwidthallocation become more and more critical to network management. Packet filtering can be used toefficiently prevent illegal users from accessing networks and to control network traffic and save networkresources. Access control lists (ACL) are often used to filter packets with configured matching rules.ACLs are sets of rules (or sets of permit or deny statements) that decide what packets can pass andwhat should be rejected based on matching criteria such as source MAC address, destination MACaddress, source IP address, destination IP address, and port number.Application of ACLs on the SwitchThe switch supports two ACL application modes:
