Network Reference

printable cheat sheets, sized for letter paper

everydayapps.io / networkcalc

Common TCP & UDP Ports

Well-known service ports grouped by category, plus port-range semantics and OS ephemeral defaults.

Web & HTTP

80tcpHTTP
443tcpHTTPS
443udpHTTP/3 (QUIC)
8080tcpHTTP alt / proxy
8443tcpHTTPS alt

Mail

25tcpSMTP (relay)
465tcpSMTPS (legacy submission)
587tcpSMTP submission (STARTTLS)
110tcpPOP3
995tcpPOP3S
143tcpIMAP
993tcpIMAPS

Remote & shell

22tcpSSH / SFTP / SCP
23tcpTelnet (plaintext)
3389tcpRDP
5900tcpVNC

File transfer

20tcpFTP data
21tcpFTP control
69udpTFTP
445tcpSMB / CIFS
2049tcpNFS

DNS & directory

53udpDNS query
53tcpDNS (zone xfer, large resp)
853tcpDNS over TLS
88tcpKerberos
389tcpLDAP
636tcpLDAPS

Infra & config

67udpDHCP server
68udpDHCP client
123udpNTP
161udpSNMP
162udpSNMP trap
514udpSyslog

Databases

1433tcpSQL Server
1521tcpOracle
3306tcpMySQL / MariaDB
5432tcpPostgreSQL
6379tcpRedis
9042tcpCassandra (CQL)
27017tcpMongoDB

Messaging & streaming

1883tcpMQTT
8883tcpMQTT over TLS
5672tcpAMQP (RabbitMQ)
9092tcpKafka
6667tcpIRC

VPN & tunneling

500udpIKE (IPsec)
4500udpIPsec NAT-T
1194udpOpenVPN (default)
51820udpWireGuard (default)
1701udpL2TP

Voice & media

5060udpSIP
5061tcpSIP over TLS
3478udpSTUN / TURN
1935tcpRTMP

Routing

179tcpBGP
520udpRIP

Legacy & system

111tcpPortmap / RPC
113tcpIdent / Auth
139tcpNetBIOS session

Dev conventions

3000tcpNode / Next / React
5173tcpVite
8000tcpDjango / Python HTTP
Common TCP & UDP Ports everydayapps.io v1