Port 6379: Redis

What is port 6379 used for?

The default Redis port.

Should port 6379 be open?

Don’t expose to the internet. Keep this port on private networks and reach it through a VPN or SSH tunnel. Bots scan for open Redis to install crypto miners. Bind to localhost, keep protected-mode on and set a password or ACLs.

See what is listening on port 6379

# Linux
sudo ss -tlnp | grep ':6379 '

# macOS
sudo lsof -nP -i TCP:6379 -sTCP:LISTEN

# Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6379 -State Listen

Open or block port 6379 in a firewall

# Ubuntu / Debian (ufw)
sudo ufw allow 6379/tcp
sudo ufw deny 6379/tcp

# Windows (PowerShell, as administrator)
New-NetFirewallRule -DisplayName "Port 6379" -Direction Inbound -Protocol TCP -LocalPort 6379 -Action Allow

On cloud servers, also open the port in the provider’s security group or network firewall. At home, a service behind a router needs a port-forwarding rule to the device’s local IP.

Test it from outside

A port can be open on the server but blocked upstream. The Port Checker connects from the internet, so it shows what the world sees. From your own machine, use nc -vz example.com 6379 (macOS/Linux) or Test-NetConnection example.com -Port 6379 (Windows).