
540 Chapter 15
For more information, consult the man pages for ipfw.
Port Reference
The following tables show the TCP and UDP port numbers commonly used by Mac OS X
computers and Mac OS X Servers. These ports can be used when you are setting up your
IP filters.
Note: See www.faqs.org/rfcs to view the RFCs referenced in the tables.
TCP port Used for Reference
7 echo RFC 792
20 FTP data RFC 959
21 FTP control RFC 959
22 ssh (secure shell)
23 Telnet RFC 854
25 SMTP (email) RFC 821
53 DNS RFC 1034
79 Finger RFC 1288
80 HTTP ( Web) RFC 2068
88 Kerberos RFC 1510
110 POP3 (email) RFC 1081
111 Remote Procedure Call (RPC) RFC 1057
113 AUTH RFC 931
115 sftp
119 NNTP (news) RFC 977
137 Windows Names
138 Windows Browser
139 Windows file and print (SMB) RFC 100
143 IMAP (email access) RFC 2060
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