How must a firewall be deployed and configured, if required?

 1)Secure your firewall:-

The attacker is able to gain administrative access to your firewall and  your network security.

 2)Architect firewall zones and IP addresses:-

In the order to protect the valuable asset on  network, you should first identify  the assets are (example, payment card data). Then plan out your network structure that assets can be group together and placed into network based on similar sensitivity level and function.  

3)Configure access control lists. 

4)Configure your other firewall services and logging. 

5)Test your firewall configuration.