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Using UFW without locking yourself out

E
Elias Bieber
Estimated reading time: 1 min

Protect SSH first, scope rules by source and protocol, then test externally: a careful UFW workflow for Debian and Ubuntu.

LinuxUFWFirewallPortsDebian

Install UFW

With UFW (Uncomplicated Firewall) you can manage ports on Linux easily.

sudo apt install ufw

Open and close ports

Open port (example 8080):

ufw allow 8080

Close port:

ufw deny 8080
  • ufw status: Shows firewall status
  • ufw enable: Enables the firewall
  • ufw disable: Disables the firewall
  • Important: Do not block port 22 (SSH) or you will lose access!

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