Basic firewall operation commands in CentOS

CentOS configures firewall operation instances (start, stop, open, and close ports): Note: basic firewall operation command: query firewall status: [root @ localhost ~] # Serviceiptablesstatus & lt; press enter & gt; stop firewall: [root @ localhost ~] # Service & nbsp

CentOS configures firewall operation instances (enable, stop, enable, and disable ports ):

 

Note: basic firewall operation commands:

Query the firewall status:

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

 

Stop firewall:

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

 

Start firewall:

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

 

Restart firewall:

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

 

Permanently disable the firewall:

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

 

Enable after permanent shutdown:

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

 

 

1. view the firewall status

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

 

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

 

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

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

 

5. view the firewall status again

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

 

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.