Port 6379 (TCP) — Redis

Redis in-memory data store.

🔒 Runs locally — your input never leaves this browser tab

Historically no auth by default; exposed instances get hijacked. Bind to localhost and set requirepass/ACLs.

Check if port 6379 is open

On the server, see what is listening:

sudo ss -tulpn | grep ':6379 '

From another machine, test reachability:

nc -zv your-server.example.com 6379

With UFW (Ubuntu/Debian):

sudo ufw deny 6379

With firewalld (RHEL/AlmaLinux/Rocky):

sudo firewall-cmd --permanent --remove-port=6379/tcp && sudo firewall-cmd --reload