| 21 |
FTP - File Transfer Protocol |
| 22 |
SSH, SFTP - Secure SHell and SSH based FTP |
| 23 |
Telnet - non-secure shell |
| 25 |
SMTP (Simple Mail Transfer Protocol) - sending and
receiving email messages
|
| 53 |
DNS (Domain Name System) - mapping from hostname to ip
and vice versa
|
| 80 |
HTTP (HyperText Transfer Protocol) - main protocol of
world wide web
|
| 110 |
POP (Post Office Protocol) - mail retrieval protocol
|
| 143 |
IMAP (Internet Message Access Protocol) - mail retrieval
protocol
|
| 443 |
HTTPS - secure HTTP |
| 3306 |
MySQL database |
| 3389 |
RDP - Remote Desktop |
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