Dell PowerConnect 5548 User Guide - Page 114

The currently-defined rules for the selected ACL are displayed. 2 To add a rule click Add ACE. 3 Select a user-defined ACL for which a rule is being created. 4 Enter the following fields: - New Rule Priority - Enter the ACE priority that determines which ACE is matched to a packet, based on a first match. - Protocol Select from List - Select to create an ACE, based on a specific protocol. The following options are available: • TCP - Transmission Control Protocol (TCP). Enables two hosts to communicate and exchange data streams. TCP guarantees packet delivery, and guarantees packets are transmitted and received in the order the are sent. • UDP - User Datagram Protocol (UDP). Communication protocol that transmits packets but does not guarantee their delivery. • ICMP - Internet Control Message Protocol (ICMP). The ICMP allows the gateway or destination host to communicate with the source host. For example, to report a processing error. • IPV6 - Matches the packet to the IPV6 protocol. - Protocol ID To Match - Enter a protocol. - Any - Check to use any protocol. - Source Port - Enter the TCP/UDP source port. Enter either a Single, Range or select Any to include all ports. - Destination Port - Enter the TCP/UDP destination port. Enter either a Single, Range or select Any to include all ports. - TCP Flags - To use TCP flags, check the TCP Flag checkbox and then check the desired flag(s). - ICMP - Specifies an ICMP message type for filtering ICMP packets. This field is available only when ICMP is selected in the Protocol field. The following options are available: • Select from List - Select an ICMP type from the list. • ICMP Type - Enter the ICMP type. 114 Dell PowerConnect 55xx Systems User Guide