Port numbers

Commonly used port numbers
CPANEL

cPanel uses port 2082 and secure port 2083
WHM uses port 2086 and secure port 2087
webmail uses port 2095 and secure port 2096

E-MAIL

POP3 connects via port 110
IMAP connects via port 143
SMTP connects via port 25, 26, and 587

Secure email connections?
POP3 over TLS/SSL 995
IMAP over TLS/SSL 993
SMTP over TLS/SSL 465

110 POP3 (for receiving email)
119 NNTP (Network News Transfer Protocol)
143 IMAP4 Protocol (for email service)
194 IRC


WEB

HTTP connects via port 80
SSL connects via port 443

FTP connects via port 21
sFTP port 2222
FTPs port 990
Webdisk port 2077 and 2078

MySQL connects via port 3306
SSH dedicated connects via port 22
SSH shared and reseller connects via port 2222

OTHER

Plesk Control Panel 8443
Plesk webmail 8425

Virtuozzo 4643
DNP 9001 * however the DNP login is on port 80

General

21 FTP
22 SSH(scp,sftp)
23 Telnet
43 WHOIS function
53 DNS Server (Domain name service for DNS requests)
67 DHCP Server
68 DHCP Client
70 Gopher Protocol
79 Finger protocol

389 TCP/UDP LDAP (light weight directory access)
443 TCP Secure HTTP over SSL (https)
465 TCP Secure SMTP (email) using SSL
990 TCP/UDP Secure FTP using SSL
993 TCP Secure IMAP protocol over SSL (for emails)
1433 TCP/UDP Microsoft SQL server port
2082 TCP Cpanel default port
2083 TCP Cpanel over SSL
2086 TCP Cpanel Webhost Manager (default)
2087 TCP Cpanel Webhost Manager (with https)
2095 TCP Cpanel Webmail
2096 TCP Cpanel secure webmail over SSL
2222 TCP DirectAdmin Server Control Panel
3306 TCP/UDP MySQL Database Server
4643 TCP Virtuosso Power Panel
5432 TCP PostgreSQL Database Server
8080 TCP HTTP port (alternative one for port 80)
8087 TCP Plesk Control Panel Port (default)
8443 TCP Plesk Server Control Panel over SSL
9999 TCP Urchin Web Analytics
10000 TCP Webmin Server Control Panel
19638 TCP Ensim Server Control Panel