Dell PowerConnect 55xx Systems User Guide 111FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Maintenance Projects\DellContax\sources\CxU_Switching_NetworkSecurity.fmD E L L C O N F I D E N T I A L – P R E L I M I N A R Y 1 0 / 3 0 / 1 3 - F O R P R O O F O N LYThe currently-defined rules for the selected ACL are displayed.2 To add a rule, click Add ACE.3 Select a user-defined ACL, and enter the following fields:– New ACE Priority (1-2147483647) —Enter the priority of the ACE.ACEs with higher priority are processed first. One is the highestpriority.– Protocol Select From List — Select to create an ACE, based on aspecific protocol. The following options are available:• ICMP — Internet Control Message Protocol (ICMP). The ICMPenables the gateway or destination host to communicate with thesource host, for example, to report a processing error.• IGMP — Internet Group Management Protocol (IGMP).Enables hosts to notify their local switch or router that they wantto receive transmissions assigned to a specific multicast group.• IPinIP — IP in IP. Encapsulates IP packets to create tunnelsbetween two routers. This ensures that IPIP tunnel appears as asingle interface, rather than several separate interfaces. IPIPenables tunnel intranets occur the internet, and provides analternative to source routing.• TCP — Transmission Control Protocol (TCP). Enables two hoststo communicate and exchange data streams. TCP guaranteespacket delivery, and guarantees that packets are transmitted andreceived in the order they are sent.• EGP — Exterior Gateway Protocol (EGP). Permits exchangingrouting information between two neighboring gateway hosts in anautonomous systems network.• IGP — Interior Gateway Protocol (IGP). Enables for routinginformation exchange between gateways in an autonomousnetwork.• UDP — User Datagram Protocol (UDP). Communicationprotocol that transmits packets but does not guarantee theirdelivery.
