Below are listed cPanel and other ports for server administration.

cPanel

cPanel 2082
cPanel – SSL 2083
WHM 2086
WHM – SSL 2087
Webmail 2095
Webmail – SSL 2096

Email

POP3 110
POP3 – SSL 995
IMAP 143
IMAP – SSL 993
SMTP 25
SMTP Alternate 26
SMTP Alternate 587
SMTP – SSL 465

Web

HTTP 80
SSL 443
FTP 21
FTPs 990
SFTP 22
SFTP Shared/Reseller Servers 2222
Webdisk 2077
Webdisk – SSL 2078
MySQL 3306
MSSQL 1433
SSH 22
SSH Shared/Reseller Servers 2222

Other

Plesk Control Panel 8880
Plesk Control Panel – SSL 8443
Plesk Linux Webmail N/A*
Plesk Windows Webmail (SmarterMail) 9998**
Virtuozzo 4643
DotNet Panel 9001
DotNet Panel Login 80
RDP (Remote Desktop Protocol) 3389