IPtables Installation And Configuration Kodekloud

 

Solution:

You have to do this in all app servers (app01, app02, app03)

Login to appserver

ssh tony@stapp01

Install Services

sudo yum install -y iptables-services

sudo yum install iptables

Accept traffic from only LBR Host for mentioned PORT in the question

sudo iptables -A INPUT -p tcp --dport 8081 -s 172.16.238.14 -j ACCEPT

Block traffic from other sources

sudo iptables -A INPUT -p tcp --dport 8081 -j DROP

Apply the changes permanently

sudo service iptables save

sudo systemctl restart iptables

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About Ashadullah Shawon

I am Ashadullah Shawon. I am a Software Engineer. I studied Computer Science and Engineering (CSE) at RUET. I Like To Share Knowledge. Learn More: Click Here