| Port Number |
Service |
Protocol |
| 20 |
FTP Data Transfer |
TCP |
| 21 |
FTP Control |
TCP |
| 22 |
SSH (Secure Shell) |
TCP |
| 23 |
Telnet |
TCP |
| 25 |
SMTP (Simple Mail Transfer Protocol) |
TCP |
| 53 |
DNS (Domain Name System) |
TCP/UDP |
| 67 |
DHCP Server |
UDP |
| 68 |
DHCP Client |
UDP |
| 69 |
TFTP (Trivial File Transfer Protocol) |
UDP |
| 80 |
HTTP (HyperText Transfer Protocol) |
TCP |
| 110 |
POP3 (Post Office Protocol) |
TCP |
| 143 |
IMAP (Internet Message Access Protocol) |
TCP |
| 161 |
SNMP (Simple Network Management Protocol) |
UDP |
| 162 |
SNMP Trap |
UDP |
| 443 |
HTTPS (HTTP Secure) |
TCP |
| 445 |
SMB (Server Message Block) |
TCP |
| 465 |
SMTPS (SMTP Secure) |
TCP |
| 587 |
SMTP (Submission) |
TCP |
| 993 |
IMAPS (IMAP Secure) |
TCP |
| 995 |
POP3S (POP3 Secure) |
TCP |
| 3306 |
MySQL |
TCP |
| 5432 |
PostgreSQL |
TCP |
| 6379 |
Redis |
TCP |
| 27017 |
MongoDB |
TCP |
| 8080 |
HTTP Alternate (commonly used for proxies) |
TCP |
| 8000 |
Commonly used for HTTP development |
TCP |
| 8888 |
Commonly used for HTTP development |
TCP |
| 2049 |
NFS (Network File System) |
TCP/UDP |
| 5000 |
Flask Development Server (or others) |
TCP |
| 5001 |
Commonly used for web apps |
TCP |
