20 – FTP (File Transfer Protocol) Data Transfer
21 – FTP (File Transfer Protocol) Common Control
22 – FTPS / SSH (Secure Shell)
26 – SMTP
25 – SMTP / EMAIL
465 – SMTP / EMAIL SSL / TLS
80 – HTTP / Apache Web server
443 – HTTPS / Apache Web server SSL
110 – POP3 / EMAIL
995 – POP3 / EMAIL SSL
143 – IMAP
993 – IMAP / EMAIL SSL
2082 – cPanel
2083 – cPanel SSL
2086 – WHM (Web Host Manager)
2087 – WHM (Web Host Manager) SSL
2095 – Webmail
2096 – Webmail SSL
2077 – WebDAV / WebDisk
2078 – WebDAV / WebDisk SSL
3306 – MYSQL
23 – Telnet
873 – RSYNC
43 – WHOIS
53 – BIND/DNS
119 – NNTP (Network News Transfer Protocol)
123 – NTP (Network Time Protocol)
161 – SNMP (Simple Network Management Protocol)
194 – IRC (Internet Relay Chat)