IPsec site-to-site vpn Video Tutorial 2

Cisco three-layer hierarchical model

Because networks can be extremely complicated, with multiple protocols and diverse technologies, Cisco has developed a layered hierarchical model for designing a reliable network infrastructure. This three-layer model helps you design, implement, and maintain a scalable

Debugging on Cisco ASA

Most of debuging on Cisco ASA can be done with simply entering "debug" in front of command for which we want to do debugging. For example if wanted to see/capture icmp traffic from user enter:

Access Control Lists (extended)

Access Control List or ACL is a technic of controling network traffic. It is a list of rules with which traffic flow can be manipulated - permitted or denied. By default, traffic flow from the interface with the higher security level (for example "inside" interface) to interface with the lower security level (example "outside" interface) is allowed by default, but the flow of traffic from "outside" to the "inside" interface must be explicitly permited.

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