CentOS firewall operation instances (start, stop, open, and close ports)

CentOS firewall operation instances (start, stop, open, and close ports)

Note: basic firewall operation commands:

Query the Firewall Status:

[Root @ localhost ~] # Service iptables status <press enter>

Stop Firewall:

[Root @ localhost ~] # Service iptables stop <press enter>

Start Firewall:

[Root @ localhost ~] # Service iptables start <press enter>

Restart Firewall:

[Root @ localhost ~] # Service iptables restart <press enter>

Permanently disable the Firewall:

[Root @ localhost ~] # Chkconfig iptables off <press enter>

Enable after permanent shutdown:

[Root @ localhost ~] # Chkconfig iptables on <press enter>

1. view the Firewall Status

[Root @ localhost ~] # Service iptables status <press enter>

2. Edit the/etc/sysconfig/iptables file. Port 8080 and port 9990 must be enabled in our instance.

Open/etc/sysconfig/iptables in the editor

3. Add port 8080 and port 9990 as needed

4. Save the/etc/sysconfig/iptables file and run the command on the terminal.

[Root @ localhost ~] # Service iptables restart <press enter>

5. view the firewall status again

[Root @ localhost ~] # Service iptables status <press enter>

6. At this time, ports 8080 and 9990 of the server can provide external services.

7. The open mode of other ports is similar to the open mode.