Port 6379 — Redis

TCP registered

What runs on port 6379

The default Redis port.

Security considerations

Redis historically had no authentication and binds to all interfaces if misconfigured. Exposed instances are routinely used to plant SSH keys and cryptominers. Bind to localhost and set a password.

Checking whether something is listening

# Linux / macOS — what is bound to the port
sudo lsof -i :6379
sudo ss -lntp | grep :6379

# Windows
netstat -ano | findstr :6379
Get-NetTCPConnection -LocalPort 6379

# is it reachable from outside?
nc -zv example.com 6379
curl -v telnet://example.com:6379

Freeing the port

# find the process, then stop it
sudo lsof -ti :6379 | xargs kill        # Linux / macOS
netstat -ano | findstr :6379            # 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