Common Network Ports

What each TCP/UDP port is used for, whether it's safe to expose, and how to check if it's open. Click any port for full details.

Database

Port 1433 — MS SQL Server
Port 1521 — Oracle DB
Port 3306 — MySQL
Port 5432 — PostgreSQL
Port 6379 — Redis
Port 9200 — Elasticsearch
Port 11211 — Memcached
Port 27017 — MongoDB

Directory

Port 389 — LDAP
Port 636 — LDAPS

Email

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

File Transfer

Port 20 — FTP Data
Port 21 — FTP Control
Port 69 — TFTP
Port 139 — NetBIOS
Port 445 — SMB
Port 873 — rsync
Port 2049 — NFS

Gaming

Port 25565 — Minecraft

Network

Port 53 — DNS
Port 67 — DHCP Server
Port 68 — DHCP Client
Port 123 — NTP
Port 135 — MS RPC
Port 161 — SNMP
Port 179 — BGP
Port 514 — Syslog
Port 1080 — SOCKS Proxy
Port 3128 — Squid Proxy

Other

Port 631 — IPP / CUPS
Port 5060 — SIP

Remote Access

Port 22 — SSH
Port 23 — Telnet
Port 1194 — OpenVPN
Port 1723 — PPTP
Port 3389 — RDP
Port 5900 — VNC

Web

Port 80 — HTTP
Port 443 — HTTPS
Port 8000 — HTTP Alt
Port 8080 — HTTP Proxy / Alt
Port 8443 — HTTPS Alt