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

 

 

 

113

AUTH

RFC 931

 

 

 

115

sftp

 

 

 

 

119

NNTP (news)

RFC 977

 

 

 

123

Network Time Server

RFC 1305

 

synchronization (NTP)

 

 

 

 

137

Windows Names

 

 

 

 

138

Windows Browser

 

 

 

 

139

Windows file and print (SMB)

RFC 100

 

 

 

143

IMAP (email access)

RFC 2060

 

 

 

Chapter 3 IP Firewall Service

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Apple 034-2351_Cvr manual Port Reference, Deleting IP Filter Rules

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