20
20
TCP
FTP -- Data
21
21
TCP
FTP -- Control
22
22
TCP
SSH Remote Login Protocol
23
23
TCP
Telnet
25
25
TCP
Simple Mail Transfer Protocol (SMTP)
53
53
TCP/UDP
Domain Name System (DNS)
80
80
TCP
Hypertext Transfer Protocol (HTTP)
110
110
TCP
POP3
143
143
TCP
IMAP
443
443
TCP
HTTP with Secure Sockets Layer (HTTPS)
3306
3306
TCP
MySQL Database system
5432
5432
TCP
PostgreSQL Database system
6379
6379
TCP
Redis key-value store
27017
27017
TCP
MongoDB Database system