Port 8080 — HTTP alternate

TCP registered

What runs on port 8080

The most common alternative HTTP port: Tomcat, Jenkins, proxies, and anything that cannot bind to 80 without root.

Security considerations

Frequently left open by accident. Anything on 8080 is scanned as thoroughly as anything on 80.

Checking whether something is listening

# Linux / macOS — what is bound to the port
sudo lsof -i :8080
sudo ss -lntp | grep :8080

# Windows
netstat -ano | findstr :8080
Get-NetTCPConnection -LocalPort 8080

# is it reachable from outside?
nc -zv example.com 8080
curl -v telnet://example.com:8080

Freeing the port

# find the process, then stop it
sudo lsof -ti :8080 | xargs kill        # Linux / macOS
netstat -ano | findstr :8080            # 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