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Chapter 3 IP Firewall Service 63
Deleting IP Filter Rules
To delete a rule, use the ipfw delete command. This example deletes rule 200:
ipfw delete 200
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’re
setting up your IP filters. See the website 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
106 Open Directory Password Server
(along with 3659)
110 POP3 (email) RFC 1081
111 Remote Procedure Call (RPC) RFC 1057
11 3 AUTH RFC 931
11 5 sftp
11 9 NNTP (news) RFC 977
12 3 Network Time Server
synchronization (NTP)
RFC 1305
137 Windows Names
13 8 Windows Browser
13 9 Windows file and print (SMB) RFC 100
143 IMAP (email access) RFC 2060
LL2351.Book Page 63 Monday, September 8, 2003 2:47 PM