Knowledgebase:
Which ports are open on your cPanel servers?
Posted by Bill Williams on 25 September 2015 02:20 PM

The following ports are open on our cPanel shared servers. If you access server using an port other than the following, we will block you IP address across our entire network.

 

Incoming TCP Ports

PORTTCPUDPDESCRIPTIONSTATUS
20 TCP UDP FTP—data transfer Official
21 TCP UDP FTP—control (command) Official
22 TCP UDP Secure Shell (SSH)—used for secure logins, file transfers (scp, sftp) and port forwarding Official
25 TCP   Simple Mail Transfer Protocol (SMTP)—used for e-mail routing between mail servers Official
26 TCP UDP Unassigned, often used as alternate SMTP Official
53 TCP UDP Domain Name System (DNS) Official
80 TCP UDP Hypertext Transfer Protocol (HTTP) Official
110 TCP   Post Office Protocol v3 (POP3) Official
143 TCP   Internet Message Access Protocol (IMAP)—management of email messages Official
443 TCP   HTTPS (Hypertext Transfer Protocol over SSL/TLS) Official
465 TCP   SMTP over SSL Unofficial
953 TCP UDP Domain Name System (DNS) RNDC Service Unofficial
993 TCP   Internet Message Access Protocol over SSL (IMAPS) Official
995 TCP   Post Office Protocol 3 over TLS/SSL (POP3S) Official
2077 TCP   Webdisk Unofficial
2078 TCP   Webdisk SSL Unofficial
2082 TCP   CPanel default Unofficial
2083 TCP   CPanel default SSL Unofficial
2086 TCP   WebHost Manager default Unofficial
2087 TCP   WebHost Manager default SSL Unofficial
2095 TCP   CPanel default Web mail Unofficial
2096 TCP   CPanel default SSL Web mail Unofficial
30000:35000 TCP   Needed pure-ftpd enabled PASV Unofficial

Outgoing TCP Ports

PORTTCPUDPDESCRIPTIONSTATUS
20 TCP UDP FTP—data transfer Official
21 TCP UDP FTP—control (command) Official
22 TCP UDP Secure Shell (SSH)—used for secure logins, file transfers (scp, sftp) and port forwarding Official
25 TCP   Simple Mail Transfer Protocol (SMTP)—used for e-mail routing between mail servers Official
37 TCP UDP TIME protocol Official
43 TCP   WHOIS protocol Official
53 TCP UDP Domain Name System (DNS) Official
80 TCP UDP Hypertext Transfer Protocol (HTTP) Official
110 TCP   Post Office Protocol v3 (POP3) Official
113 TCP UDP ident—Authentication Service/Identification Protocol, used by IRC servers to identify users Official
143 TCP   Internet Message Access Protocol (IMAP)—management of email messages Official
443 TCP   HTTPS (Hypertext Transfer Protocol over SSL/TLS) Official
587 TCP   e-mail message submission (SMTP) Official
873 TCP UDP rsync file synchronisation protocol Official USA only
995 TCP   Post Office Protocol 3 over TLS/SSL (POP3S) Official
2087 TCP   WebHost Manager default SSL Unofficial
2089 TCP   cPanel License Update Unofficial
2703 TCP   2703 Razor email scanning Unofficial

Incoming UDP Ports

PORTTCPUDPDESCRIPTIONSTATUS
20 TCP UDP FTP—data transfer Official
21 TCP UDP FTP—control (command) Official
53 TCP UDP Domain Name System (DNS) Official

Outgoing UDP Ports

PORTTCPUDPDESCRIPTIONSTATUS
20 TCP UDP FTP—data transfer Official
21 TCP UDP FTP—control (command) Official
53 TCP UDP Domain Name System (DNS) Official
113 TCP UDP ident—Authentication Service/Identification Protocol, used by IRC servers to identify users Official
123   UDP Network Time Protocol (NTP)—used for time synchronization Official
873 TCP UDP rsync file synchronisation protocol Official USA only
6277   UDP Distributed Checksum Clearinghouses (anti-spam) Unofficial
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