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TCP/UDP Ports Reference — 50 common ports explained

Interactive reference for 80+ TCP/UDP ports — search by number or service, filter by transport / category / risk, and read the security advisory for every port.

Interactive port explorer

Web (HTTP/HTTPS)

80
HTTP
TCP
 443
HTTPS
TCP
 8080
HTTP alt
TCP
 8443
HTTPS alt
TCP

Email (SMTP/IMAP/POP3)

25
SMTP
TCP
 110
POP3
TCP
 143
IMAP
TCP
 465
SMTPS
TCP
 587
SMTP Submission
TCP
 993
IMAPS
TCP
 995
POP3S
TCP

Databases

1433
MS SQL Server
TCP
 1521
Oracle DB
TCP
 3306
MySQL / MariaDB
TCP
 5432
PostgreSQL
TCP
 6379
Redis
TCP
 9200
Elasticsearch
TCP
 11211
Memcached
TCP/UDP
 27017
MongoDB
TCP

Security / Remote Access

22
SSH / SFTP
TCP
 3389
RDP
TCP
 5900
VNC
TCP

Networking

53
DNS
UDP/TCP
 67
DHCP Server
UDP
 68
DHCP Client
UDP
 123
NTP
UDP
 161
SNMP
UDP
 162
SNMP Trap
UDP
 179
BGP
TCP
 514
Syslog
UDP
 1080
SOCKS Proxy
TCP
 1194
OpenVPN
UDP/TCP
 3128
Squid Proxy
TCP
 51820
WireGuard
UDP

Enterprise

389
LDAP
TCP/UDP
 445
SMB
TCP
 636
LDAPS
TCP
 2049
NFS
TCP

Media / VoIP

3478
STUN / TURN
UDP
 5060
SIP
UDP/TCP
 5061
SIP over TLS
TCP

Developer Tools

3690
Subversion
TCP
 9090
Prometheus
TCP

Gaming

25565
Minecraft
TCP

Legacy (do not expose)

20
FTP Data
TCP
 21
FTP Control
TCP
 23
Telnet
TCP
 194
IRC
TCP
 1723
PPTP VPN
TCP
 6697
IRC over TLS
TCP

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