On Debian Buster I have installed the UFW Firewall

However, after enabling

$ ufw enable
Command may disrupt existing ssh connections. Proceed with operation (y|n)? y
Firewall is active and enabled on system startup

The Firewall is disabled after Reboot

$ ufw status
Status: inactive

The Config-File looks like this:

nano /etc/ufw/ufw.conf

Help is very appreachiated!


You need to enable the service with a service manager.

sudo systemctl start ufw    # starts the service 
sudo systemctl enable ufw   # starts the service on boot

ufw enable should do the same. See the first Output:

Firewall is active and enabled on system startup

However, your suggestion:

$ sudo systemctl enable ufw
Synchronizing state of ufw.service with SysV service script with /lib/systemd/systemd- 
Executing: /lib/systemd/systemd-sysv-install enable ufw

Has no effect:

$ ufw status
Status: inactive

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