Reference Guide
27
Well-Known Services List
NextStep
178
TCP/UDP
NextStep Window Server
bgp
179
TCP/UDP
Border Gateway Protocol
unify
181
TCP/UDP
Unify
irc
194
TCP/UDP
Internet Relay Chat Protocol
at-rtmp
201
TCP/UDP
AppleTalk Routing Maintenance
at-nbp
202
TCP/UDP
AppleTalk Name Binding
at-3
203
TCP/UDP
AppleTalk Unused
at-echo
204
TCP/UDP
AppleTalk Echo
at-5
205
TCP/UDP
AppleTalk Unused
at-zis
206
TCP/UDP
AppleTalk Zone Information
at-7
207
TCP/UDP
AppleTalk Unused
at-8
208
TCP/UDP
AppleTalk Unused
qmtp
209
TCP/UDP
Quick Mail Transfer Protocol
z39.50
210
TCP/UDP
ANSI Z39.50 (WAIS)
ipx
213
TCP/UDP
IPX
imap3
220
TCP/UDP
Interactive Mail Access Protocol v3
fln-spx
221
TCP/UDP
Berkeley rlogind with SPX auth
rsh-spx
222
TCP/UDP
Berkeley rshd with SPX auth
backweb
371
UDP
BackWeb
ulistserv
372
TCP/UDP
Unix Listserv
netware-ip
396
TCP/UDP
Novell Netware over IP
biff
512
UDP
Used by mail system to notify users
exec
512
TCP
Remote process execution
login
513
TCP/UDP
Login Host Protocol
who
513
UDP
Maintains databases showing who’s
who
cmd
514
TCP
Like exec, but automatic
syslog
514
UDP
logging facilities
printer
515
TCP/UDP
Spooler
talk
517
TCP/UDP
Talk protocol
ntalk
518
TCP/UDP
another Talk
utime
519
TCP/UDP
Unixtime
router
520
UDP
RIP local routing process (on site)
timed
525
TCP/UDP
Timeserver
tempo
526
TCP/UDP
Newdate
courier
530
TCP/UDP
Rpc
conference
531
TCP/UDP
Chat
netnews
532
TCP/UDP
Readnews
netwall
533
TCP/UDP
For emergency broadcasts
uucp
540
TCP/UDP
Uucpd
Service Name
Port #
Protocol
Description
