Here is my basic example configure:
First install ufw:
apt-get install ufw
Which also installed the iptables package.
Then check the status:
ufw status
Shout be disabled for fresh setup.
Next all my configure and enable ufw at the END:
ufw default deny incoming ufw default allow outgoing ufw allow 80 ufw allow 443 ufw allow from vpn.milliondollarserver.com ufw enable
Final status should looks like this:
# ufw status verbose Status: active Logging: on (low) Default: deny (incoming), allow (outgoing), disabled (routed) New profiles: skip To Action From -- ------ ---- 80 ALLOW IN Anywhere 443 ALLOW IN Anywhere Anywhere ALLOW IN vpn.milliondollarserver.com 80 (v6) ALLOW IN Anywhere (v6) 443 (v6) ALLOW IN Anywhere (v6)
