Santos:CCNA Sec 210-260 OCG

Firewall Rule Design Guidelines

Regardless of which type of rules you choose to implement, here are some guidelines for the creation of those rules:

Use a restrictive approach as opposed to a permissive approach for all interfaces and all directions of traffic. By using this as a starting point, you can then permit only traffic that you specify while denying everything else. This might take a little while to fine-tune because many administrators often discover additional required protocols for the functionality of their networks that may not have ...