[Day 10] 6. Monitoring commands

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  A#show access-list

  : Displays all configured access control lists (both named and numbered) on the device.
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  A#show access-list 120

  : Shows the details of the specific access control list (ACL) numbered
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  120

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  A#show ip access-list

  : Displays only the IP-based named access control lists (ACLs) configured on the device.
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  A#show ip interface

  : Shows detailed IP-related information for all interfaces, including ACLs applied on them.
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  A#show run

  : same as `A#show ip interface

Policies

A firewall policy defines the rules and guidelines that determine how a firewall controls and manages network traffic. These policies specify what kind of traffic (e.g., based on IP addresses, protocols, or ports) is allowed or blocked as it flows between different network zones (e.g., internal network, external internet). The main goal is to protect the network from unauthorized access, malicious traffic, and data breaches while ensuring legitimate traffic can pass.

Firewall policies are typically configured based on security requirements, organizational needs, and compliance regulations, and they help enforce the network's security posture by deciding whether to permit, deny, or log traffic based on pre-defined conditions.