nat Archives – Practical Networking .net

NAT on Cisco ASA and ASAx Firewalls – Udemy Course

Ed Harmoush — Thu, 04 Jun 2020 17:16:38 +0000

I just published my second course on Udemy. This one covers the full depth of how to configure and verify Network Address Translation on Cisco ASA and Cisco ASAx Firewalls. This course has three modules: The first module will teach you Everything there is to know about Network Address Translation: Why it exists, How it it works,… Read More »NAT on Cisco ASA and ASAx Firewalls – Udemy Course

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NAT on Cisco IOS Routers – Udemy Course

Ed Harmoush — Fri, 22 May 2020 19:54:42 +0000

Hey everyone. I published my first course on Udemy. You can access it at a discount with this link: This course has two modules: The first module will teach you Everything there is to know about Network Address Translation: Why it exists, How it it works, What happens to packets as they get translated. This module… Read More »NAT on Cisco IOS Routers – Udemy Course

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Cisco Firepower & Cisco ASA – NAT Configuration Guide

Ed Harmoush — Mon, 16 Apr 2018 21:06:57 +0000

This article provides all the information you need to understand and configure NAT on Cisco ASA, Cisco ASA-X , and Cisco Firepower Firewalls. There are four possible methods of address translation, and each were defined in the Network Address Translation article series: Static NAT, Static PAT, Dynamic PAT, Dynamic NAT. This article assumes prior knowledge… Read More »Cisco Firepower & Cisco ASA – NAT Configuration Guide

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Cisco NAT Configuration – IOS Router

Ed Harmoush — Thu, 18 Jan 2018 20:38:10 +0000

In this article, we will illustrate the Cisco NAT configuration on IOS Routers. This is a follow up article to the Network Address Translation article series which thoroughly covered the operation of NAT and answers the questions “What is NAT?” and “How does NAT work?“. There are only four types of network address translation: Static NAT, Static PAT,… Read More »Cisco NAT Configuration – IOS Router

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VPN with Overlapping Networks

Ed Harmoush — Tue, 05 Dec 2017 17:00:24 +0000

When connecting two sites together using a Virtual Private Network (VPN), a common issue that is encountered is trying to build a VPN with overlapping networks — where both sites happen to use the same Private IP addresses. In such cases, hosts on one side of the VPN tunnel will be unable to communicate with… Read More »VPN with Overlapping Networks

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Cisco NAT Terminology

Ed Harmoush — Wed, 15 Nov 2017 17:00:32 +0000

Cisco has created some NAT terminology which explicitly refer to the IP addresses and/or ports involved in Network Address Translation (NAT). While discussing the addresses involved in a NAT, using the terms like “Source” and “Destination” are common. However, using such terms can create some ambiguity. Specifically, the terms “Source” and “Destination” can create confusion… Read More »Cisco NAT Terminology

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Network Address Translation (NAT)

Ed Harmoush — Wed, 08 Nov 2017 19:33:15 +0000

Every device on the Internet has an IP address. The IP address serves as the device’s identification – much like how a phone number identifies a particular phone. When devices communicate on the Internet, they are sending data from their IP address to the IP address of their intended destination. Sometimes, while data is en… Read More »Network Address Translation (NAT)

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NAT Terminology Disambiguation

Ed Harmoush — Sun, 05 Nov 2017 23:37:54 +0000

If you’ve made it here, then at this point you should have a solid understanding of each of the four types of translation that can exist: Static NAT, Static PAT, Dynamic PAT, and Dynamic NAT. Moreover, you have an understanding of Policy NAT and Twice NAT, which are simply two different ways of implementing the… Read More »NAT Terminology Disambiguation

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Policy NAT and Twice NAT

Ed Harmoush — Wed, 01 Nov 2017 19:32:17 +0000

Every type of NAT we have discussed so far have two things in common. The first is that only the source of the packet is used to make a NAT decision. The second is that only the source of the outbound packet is translated. Policy NAT and Twice NAT are two ways of performing any… Read More »Policy NAT and Twice NAT

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Dynamic NAT

Ed Harmoush — Wed, 25 Oct 2017 18:51:08 +0000

According to the definitions outlined in the NAT Terminology article, a Dynamic NAT implies a translation of just the IP address, where the post-translation attributes are selected by the router. In a Dynamic NAT, a multitude of hosts with private IP addresses can share an equal or fewer amount of public IP addresses. It may… Read More »Dynamic NAT

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