Chapter40 More About....
Services and Ports
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Cisco Router and Security Device Manager 2.5 User’s Guide
OL-4015-12
UDP Services
lpd 515 Line Printer Daemon. A protocol used to send print jobs
between UNIX systems.
nntp 119 Network News Transport Protocol.
pim-auto-rp 496 Protocol-Independent Multicast Auto-RP. PIM is a multicast
routing architecture that allows the addition of multicast IP
routing on existing IP networks.
pop2 109 Post Office Protocol v2. Protocol that client e-mail applications
use to retrieve mail from mail servers.
pop3 110 Post Office Protocol v3
smtp 25 Simple Mail Transport Protocol. Internet protocol providing
e-mail services.
sunrpc 111 SUN Remote Procedure Call. See rpc.
syslog 514 System log.
UDP Service Port Number Description
biff 512 Used by mail system to notify users that new mail is received
bootpc 69 Bootstrap Protocol (BOOTP) client
bootps 67 B ootstrap Protocol (BOOTP) server
discard 9 Discard
dnsix 195 DNSIX security protocol auditing
domain 53 Domain Name Service (DNS)
echo 7 See echo.
isakmp 500 Internet Security Association and Key Management Protocol
mobile-ip 434 Mobile IP registration
nameserver 42 IEN116 name service (obsolete)
netbios-dgm 138 NetBios datagram service. Network Basic Input Output System. An API
used by applications to request services from lower-level network
processes.
TCP Service Port Number Description