Use of the Ubuntu partial port command----Open port/Open firewall

Environment system: Ubuntu

Tools: Xshell + VirtualBox

1. Test whether the port of the remote host is turned on (Windows command line execution)

Telnet 192.168.1.103 80

Remote access host 80 port, test host's 80 port is turned on

2. Check the local port opening situation (Ubuntu execution)

sudo UFW status

　　

3. Open the 80 port (performed under Ubuntu)

sudo UFW allow 80

4. Firewall on (Ubuntu execution)

sudo UFW enable

　　

5. Firewall restart (performed under Ubuntu)

sudo ufw reload

　　

Use of the Ubuntu partial port command----Open port/Open firewall