Advanced ACL & NAT

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This course has two modules.

The first module will teach you Everything there is to know about Advanced Access control Lists: The first module will talk about concepts like Established ACL’s, Reflexive ACL’s, Dynamic ACL’s and Time Based ACL’s.

• Established ACL’s

• Dynamic ACL’s

• Time Based ACL’s

• Reflexive ACL’s

The first module will teach you Everything about the Network Address Translation. Why it exists, How it it works, What happens to packets as they get translated. This module will explain every type of translation: Static NAT, Static PAT, Dynamic PAT, and Dynamic NAT. You’ll learn about each of these in a way that is completely vendor agnostic — the concepts you learn here will apply to any vendor and any platform.

NAT Types

There are three different types of NATs. People use them for different reasons, but they all still work as a NAT.

1. Static NAT

When the local address is converted to a public one, this NAT chooses the same one. This means there will be a consistent public IP address associated with that router or NAT device.

2. Dynamic NAT

Instead of choosing the same IP address every time, this NAT goes through a pool of public IP addresses. This results in the router or NAT device getting a different address each time the router translates the local address to a public address.

3. PAT

PAT stands for port address translation. It’s a type of dynamic NAT, but it bands several local IP addresses to a singular public one. Organizations that want all their employees’ activity to use a singular IP address use a PAT, often under the supervision of a network administrator.

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