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Port number |
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Lets clients do this |
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20 (FTP Data)
21 (FTP Control) |
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Use FTP to transfer files to and from your server
You must create a filter for both ports 20 and 21.
IMPORTANT: FTP passive mode may not use these port numbers. To allow passive FTP connections, allow access to all ports for specific FTP users, or change the default filter to "allow all." |
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23 (Telnet) |
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Use a Telnet-based application to communicate with your server |
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25 (SMTP) |
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Upload mail to your server (if it uses the SMTP protocol) |
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79 (Finger) |
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Look up your users' names and e-mail addresses in a directory |
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80 (Web) |
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Access your Web site |
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106 (PASS) |
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Change an e-mail password using the PASS protocol |
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110 (POP) |
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Receive mail from your server using the POP protocol |
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137 |
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Windows name service UDP port number |
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138 |
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Windows Network Neighborhood UDP port number |
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139 (NETBIOS/SMB) |
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Exchange files with your server from a Windows computer |
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143 (IMAP) |
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Receive mail from your server using the IMAP protocol |
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311 (Web-based Remote Admin) |
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Access the Web-based Remote Admin CGI |
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515 (LPR) |
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Print to a print queue via TCP/IP |
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548 (AFP/TCP) |
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Share files using AppleTalk Filing Protocol (AFP) over TCP |
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626 (IMAP Admin) |
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Remotely administer the mail database |
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687 (Shared Users) |
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From a secondary server, access the primary server's Users & Groups information |
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660 |
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Access the Mac OS Server Admin application |
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