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Old 29-07-2004, 22:03   #1
shawnho
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Articles - Ports to open on a Cpanel webserver

Note : Server configuration and needs vary from user to user, thus do not blindly follow the example ports usage below but use this as a reference instead

There are numerous ports that should be open on your cPanel server, this article will try to maintain and update record of all of these ports:

Code:
 
port service	  protocol	direction
20	 ftp		  tcp	 inbound/outbound
21	 ftp		  tcp,udp inbound/outbound
22	 ssh		  tcp	 inbound
25	 smtp		 tcp	 inbound/outbound
26	 smtp		 tcp	 inbound/outbound [1]
37	 rdate		tcp	 outbound
43	 whois		tcp	 outbound
53	 DNS		  tcp/udp inbound/outbound [2]
80	 http		 tcp	 inbound/outbound
110	pop3		 tcp	 inbound
113	ident		tcp	 outbound
143	imap4		tcp	 inbound
443	https		tcp	 inbound
465	smtp tls/ssl tcp/udp inbound/outbound
873	rsync		tcp/udp outbound
953	bind9		tcp	 outbound [4]
993	imap4 ssl	tcp	 inbound
995	pop3 ssl	 tcp	 inbound
2082   cpanel	   tcp	 inbound
2083   cpanel ssl   tcp	 inbound
2086   whm		  tcp	 inbound
2087   whm ssl	  tcp	 inbound
2089   cp licence   tcp	 outbound
2095   Webmail	  tcp	 inbound
2096   Webmail SSL  tcp	 inbound
3306   mysql		tcp	 inbound
6666   chat		 tcp	 inbound
50000  ftp		  tcp	 inbound [5]
through
50400  ftp		  tcp	 inbound
[1] Only in use if Exim-26 is enabled in WHM, in order to allow those customers who's ISP block port 25 outgoing to use your SMTP servers.

[2] Inbound is only needed if you run a public nameserver.

[3] Only needed if you connect to MySQL remotely.

[4] Only needed if you use a trust relationship for your nameservers

[5] For Passive mode FTP you should open up twice as many FTP ports as you plan on having clients, assuming you will have 200 clients, 400 ports should be open. You will also need to specify which ports the FTP daemon should use.



Article courtesy of CPanelFAQ.com
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