cPanel on IP Table firewall server
Dedicated Server Hosting
If you are using standard IP table firewall with your linux dedicated server then you need to open few port if you want to use cPanel without any technical problem.
Try to open following mentioned ports if you are using IPtable firewall….
Port : Function
20 : FTP TCP inbound and outbound
21 : FTP TCP,UDP inbound and outbound
22 : SSH inbound
25 : SMTP TCP inbound and outbound
26 : SMTP TCP inbound and outbound
37 : RDATE TCP outbound
43 : WHOIS TCP outbound
53 : DNS TCP/UDP inbound and outbound
80 : HTTP TCP inbound and outbound
110 : POP3 TCP inbound
113 : IDENT TCP outbound
143 : IMAP TCP inbound
443 : HTTPS TCP inbound
465 : SMTP TLS/SSL TCP/UDP inbound and outbound
873 : RSYNC TCP/UDP outbound
993 : IMAP 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
though most of the above ports are open but its always better if you cross verify.
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