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For a server to work and for services on it to be used, a number of so-called network ports must be open on it. These can be ports for e-mail management (incoming and outgoing mail), FTP for file transfers and SSH for more advanced functions. For servers running cPanel, a number of ports specific to that platform must also be available for the control panel to be accessible and usable.
Below we list a selection of the ports that are open for traffic on our servers. Please note that there may be more ports open and these are required for the systems to function.
| Network port | Function |
|---|---|
| 21 | FTP (file transfers) |
| 22 | SSH/SFTP (terminal and file transfers) |
| 25 | SMTP (outgoing email) |
| 26 | SMTP (outgoing email) |
| 80 | HTTP (websites accessible via http:// ) |
| 110 | POP3 (incoming email) |
| 143 | IMAP (incoming email) |
| 443 | HTTPS (websites accessible via https:// ) |
| 465 | SMTP (outgoing email) |
| 587 | SMTP (outgoing email) |
| 993 | IMAP (incoming email) |
| 995 | POP3 (incoming email) |
| 1100-1499 | Passive FTP connections (file transfers) |
| 2077-2080 | cPanel Caldav/Webdav |
| 2082 | cPanel HTTP (redirects to HTTPS) |
| 2083 | cPanel HTTPS |
| 2086 | WHM HTTP (redirects to HTTPS) |
| 2087 | WHM HTTPS |
| 2095 | Webmail HTTP (Roundcube, redirects to HTTPS) |
| 2096 | Webmail HTTPS (Roundcube) |
| 3306 | MariaDB (MySQL, databases) |