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What ports should be open if I’m running my cPanel server behind a firewall?

Solution Ports that must be open to run cPanel behind a firewall: 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 37 rdate tcp outbound 43 whois tcp outbound 53 DNS tcp/udp inbound/outbound (inbound is only needed if you run your own public DNS server you) 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 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 …

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