| Port |
Process/Service |
| 21 |
File Transfer Protocol (FTP) |
| 22 |
Secure Shell (SSH) |
| 23 |
Telnet |
| 25 |
Simple Mail Transfer Protocol (SMTP) |
| 53 |
Domain Name System (DNS) |
| 80 |
Hypertext Transfer Protocol (HTTP) |
| 110 |
Post Office Protocol (POP) |
| 119 |
Network News Transfer Protocol (NNTP) |
| 143 |
Internet Message Access Protocol (IMAP) |
| 443 |
Hypertext Transfer Protocol Secure (HTTPS) |
| 465 |
Secure SMTP |
| 585 |
Secure IMAP |
| 587 |
Alternative for SMTP (if port 25 is blocked) |
| 993 |
Internet Message Access Protocol over TLS/SSL (IMAPS) |
| 995 |
Secure POP3 |
| 1433 |
Microsoft SQL (MSSQL) Server database management system |
| 2082 |
cPanel default |
| 2083 |
cPanel SSL default |
| 2086 |
WebHost Manager default |
| 2087 |
WebHost Manager SSL default |
| 2095 |
cPanel Webmail default |
| 2096 |
cPanel Webmail SSL default |
| 3306 |
MySQL database system |
| 3389 |
Microsoft Terminal Server (RDP) |
| 8080 |
Apache Tomcat + alternative for HTTP |
| 8443 |
Apache Tomcat SSL + Plesk |