
OmniConnect / ISDN User’s Manual Page 84
Part number 613-10787-00
Appendix C. Common TCP/UDP
port assignments
This appendix provides a list of currently assigned TCP port numbers. To the extent possible,
UDP utilizes the same port numbers as TCP. For a definitive reference see RFC 1771.
Port Number Protocol Description
0 - Reserved.
1-4 - Unassigned
5 RJE Remote Job Entry
7 ECHO Echo
11 USERS Active Users
15 NETSTAT Who is up or NETSTAT queries
17 QUOTE Quote of the Day
19 CHARGEN Character Generator
20 FTP-DATA File Transfer Protocol – Data Traffic
21 FTP File Transfer Protocol – Control Traffic
23 TELNET Terminal Connection Sessions
25 SMTP Simple Mail Transport Protocol
37 TIME Time
42 NAMESERVER Host Name Server
43 NICNAME Who is
49 LOGIN Login Host Protocol
53 DOMAIN Domain Name Service
67 BOOTPS Bootstrap Protocol Server
68 BOOTPC Bootstrap Protocol Client
69 TFTP Trivial File Transfer Protocol
75 - Any private dial-out service
79 FINGER Finger
80 HTTP HyperText Transfer Protocol – WWW
101 HOSTNAME NIC Host Name Server
103 X400 X400
104 X400-SND X400-SND
111 SUNRPC Sun Remote Procedure Call
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