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Port Reference Guide
Complete reference guide for common network ports and their services
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Port
Protocol
Service
Description
Category
20
TCP
FTP-DATA
File Transfer Protocol (data)
File Transfer
21
TCP
FTP
File Transfer Protocol (control)
File Transfer
22
TCP
SSH
Secure Shell
Remote Access
23
TCP
Telnet
Telnet (unencrypted remote access)
Remote Access
25
TCP
SMTP
Simple Mail Transfer Protocol
Email
53
TCP/UDP
DNS
Domain Name System
Network Services
67
UDP
DHCP
Dynamic Host Configuration Protocol (server)
Network Services
68
UDP
DHCP
Dynamic Host Configuration Protocol (client)
Network Services
69
UDP
TFTP
Trivial File Transfer Protocol
File Transfer
80
TCP
HTTP
Hypertext Transfer Protocol
Web
110
TCP
POP3
Post Office Protocol v3
Email
119
TCP
NNTP
Network News Transfer Protocol
Other
123
UDP
NTP
Network Time Protocol
Network Services
143
TCP
IMAP
Internet Message Access Protocol
Email
161
UDP
SNMP
Simple Network Management Protocol
Network Services
194
TCP
IRC
Internet Relay Chat
Messaging
389
TCP
LDAP
Lightweight Directory Access Protocol
Directory
443
TCP
HTTPS
HTTP over TLS/SSL
Web
445
TCP
SMB
Server Message Block
File Transfer
465
TCP
SMTPS
SMTP over TLS
Email
514
UDP
Syslog
System Logging Protocol
Network Services
587
TCP
SMTP
SMTP (mail submission)
Email
636
TCP
LDAPS
LDAP over TLS
Directory
993
TCP
IMAPS
IMAP over TLS
Email
995
TCP
POP3S
POP3 over TLS
Email
1433
TCP
MSSQL
Microsoft SQL Server
Database
1521
TCP
Oracle
Oracle Database
Database
2049
TCP/UDP
NFS
Network File System
File Transfer
3306
TCP
MySQL
MySQL Database
Database
3389
TCP
RDP
Remote Desktop Protocol
Remote Access
5432
TCP
PostgreSQL
PostgreSQL Database
Database
5900
TCP
VNC
Virtual Network Computing
Remote Access
6379
TCP
Redis
Redis In-Memory Database
Database
6443
TCP
Kubernetes
Kubernetes API Server
Other
8080
TCP
HTTP-ALT
Alternative HTTP port
Web
8443
TCP
HTTPS-ALT
Alternative HTTPS port
Web
9200
TCP
Elasticsearch
Elasticsearch REST API
Database
27017
TCP
MongoDB
MongoDB Database
Database
38 of 38 ports
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