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C. Router CLI Commands, Codes, and Designations
C-34 December 2002 9700-A2-GB20-20
UDP Port Designations
Use the User Datagram Protocol (UDP) port designations in Table C-17, UDP Port
Designations, when specifying a specific UCP port to be filtered.
Table C-17. UDP Port Designations
UDP Port # UDP Port Name Description
7 echo Echo
9discardDiscard
37 time Time
42 nameserver IEN116 name service (obsolete)
49 tacacs TAC Access Control System
53 domain Domain Name Service (DNS)
67 bootpc Bootstrap Protocol (BOOTP) client
68 bootps Bootstrap Protocol (BOOTP) server
69 tftp Trivial File Transfer Protocol
111 sunrpc Sun Remote Procedure Call
123 ntp Network Time Protocol
137 netbios-ns NetBios name service
138 netbios-dgm NetBios datagram service
161 snmp Simple Network Management Protocol
162 snmptrap SNMP Traps
177 xdmcp X Display Manager Control Protocol
195 dnsix DNSIX security protocol auditing
434 mobile-ip Mobile IP registration
512 biff Biff (mail notification, comsat)
513 who Who service (rwho)
514 syslog System Logger
517 talk Talk
520 rip Routing Information Protocol