Port 514 — Syslog

UDP well-known

What runs on port 514

Remote logging.

Security considerations

UDP syslog has no authentication and no delivery guarantee. Use TLS syslog on 6514 for anything that matters.

Checking whether something is listening

# Linux / macOS — what is bound to the port
sudo lsof -i :514
sudo ss -lntp | grep :514

# Windows
netstat -ano | findstr :514
Get-NetTCPConnection -LocalPort 514

# is it reachable from outside?
nc -zv example.com 514
curl -v telnet://example.com:514

Freeing the port

# find the process, then stop it
sudo lsof -ti :514 | xargs kill        # Linux / macOS
netstat -ano | findstr :514            # note the PID, then:
taskkill /PID <pid> /F                    # Windows

Other common ports

• Port 20 — FTP data
• Port 21 — FTP control
• Port 22 — SSH / SFTP
• Port 23 — Telnet
• Port 25 — SMTP
• Port 53 — DNS
• Port 67 — DHCP server
• Port 68 — DHCP client
• Port 69 — TFTP
• Port 80 — HTTP
• Port 110 — POP3
• Port 123 — NTP
• Port 143 — IMAP
• Port 161 — SNMP
• Port 389 — LDAP
• Port 443 — HTTPS
• Port 445 — SMB
• Port 465 — SMTPS

All port numbers