How do I see the current status of my firewall?
sudo ufw status verbose
How do I open tcp port # 22?
To allow incoming tcp packets on port 22, enter:
sudo ufw allow 22/tcp
Verify it:
sudo ufw status verbose
How do I open tcp port # 80 and 443?
The service specific syntax is as follows to open http and https service ports:
sudo ufw allow http
sudo ufw allow https
sudo ufw allow 80/tcp
sudo ufw allow 443/tcp
How do I open tcp and udp port # 53?
To allow incoming tcp and udp packet on port 53, enter:
sudo ufw allow 53
Verify it:
sudo ufw status verbose
To allow IP address 192.168.1.10 access to port 22 for all protocols
sudo ufw allow from 192.168.1.10 to any port 22
To allows subnet 192.168.1.0/24 to Samba services, enter:
ufw allow from 192.168.1.0/24 to any app Samba
You can find service info as follows:
sudo ufw app list
To get information on Squid profile/app, run:
ufw app info Squid