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MuthuKumar
MuthuKumar

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To install Firewall Command In Centos_linux

#centos #linux #firewall

STEP 1:

Update your package repository

sudo yum update
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STEP 2:

install firewalld

sudo yum install firewalld
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STEP 3:

Start the firewalld service and enable it to start at boot: 

sudo systemctl start firewalld
sudo systemctl enable firewalld
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STEP 4:

You can check the status of the firewalld service: 

sudo systemctl status firewalld
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  • That's it! You now have firewalld installed and running on your CentOS system. You can configure your firewall rules using the firewall-cmd command. Here are a few examples of how to use firewall-cmd to configure your firewall:

STEP 5:

Allow incoming traffic on a specific port (e.g., port 80 for HTTP): 

sudo firewall-cmd --zone=public --add-port=80/tcp --permanent
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STEP 6:

Reload the firewall to apply the changes:

bash:

sudo firewall-cmd --reload
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STEP 7:

List all open ports in the default zone (usually "public"): 

sudo firewall-cmd --list-ports
sudo firewall-cmd --list-all
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STEP 8:

List all the services currently allowed through the firewall: 

sudo firewall-cmd --list-services
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