Port 2049 (TCP/UDP) — NFS

Check if port 2049 is open

On the server, see what is listening:

sudo ss -tulpn | grep ':2049 '

From another machine, test reachability:

nc -zv your-server.example.com 2049

Block port 2049 from the internet

With UFW (Ubuntu/Debian):

sudo ufw deny 2049

With firewalld (RHEL/AlmaLinux/Rocky):

sudo firewall-cmd --permanent --remove-port=2049/tcp && sudo firewall-cmd --reload

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