Series Archives – Practical Networking .net

Access Control Lists (ACLs)

Ed Harmoush — Tue, 01 Sep 2020 22:20:32 +0000

Access Control Lists, or ACLs, are a tool that is used to define traffic on Cisco routers. By themselves, they merely identify a particular set of traffic. How you apply the ACL then determines what occurs to that traffic. For instance, if you apply an ACL to… … an interface? Matched traffic is allowed through… Read More »Access Control Lists (ACLs)

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ACLs… Closer to the Source or the Destination?

Ed Harmoush — Wed, 26 Aug 2020 19:03:00 +0000

The final video in the ACL video series answers the age old question: Where should you apply ACLs? Specifically, we’re going to look at the ideas of applying ACLs closest to the source or closest to the destination; and in what cases you should do either, or neither. The specific subjects and timestamps for what… Read More »ACLs… Closer to the Source or the Destination?

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Applying ACLs to Interfaces

Ed Harmoush — Tue, 18 Aug 2020 17:37:00 +0000

In Part 7 of the video series on Access Control Lists we finally apply access lists to an Interface. In Video 1 we discussed that an ACL is simply a tool used to identify traffic on a Cisco Router. We discussed that what an ACL does is a result of how you apply it. In… Read More »Applying ACLs to Interfaces

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IPv6 Access Lists

Ed Harmoush — Tue, 11 Aug 2020 17:18:00 +0000

In Part 6 of the video series on Access Lists we look at the syntax and configuration of IPv6 ACLs. This video picks up where we left off and is a direct follow up to the five videos before it. The core of this video simply shows you how IPv6 ACLs are just a little… Read More »IPv6 Access Lists

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Named ACL Configuration

Ed Harmoush — Fri, 07 Aug 2020 17:10:00 +0000

Part 5 of the video series on Access Control Lists is a demonstration of the configuration of Named ACLs. We begin by re-configuring the Numbered ACL from Part 3 as a Named ACL in order to show you the similarities between the syntax of Named ACLs and Numbered ACLs. Then we step through and demonstration… Read More »Named ACL Configuration

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Named ACL Syntax

Ed Harmoush — Tue, 04 Aug 2020 00:28:23 +0000

Part 4 of the video series on Access Control Lists picks apart the syntax required to configure a Named Access List. In the video, we will continue where we left off in the prior videos by re-configuring the Numbered ACL as a Named ACL. You’ll see just how similar the syntax is between Numbered ACLs… Read More »Named ACL Syntax

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Numbered ACL Configuration

Ed Harmoush — Mon, 27 Jul 2020 18:52:59 +0000

In Part 3 of the series on ACLs, we go through a live demonstration of the configuration of various Numbered ACL statements. We’ll use the syntax we learned in the prior video to create access list entries to match specific packets. In doing so, we’ll get to talk through some important concepts — the implicit… Read More »Numbered ACL Configuration

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Numbered ACL Syntax

Ed Harmoush — Fri, 24 Jul 2020 18:41:54 +0000

Part 2 of the video series on Access Control List picks apart the syntax for configuring Numbered ACL. We’ll step through each field in the command of a Numbered ACL and explain the ins and outs of what they mean and how they work. Specifically, we’ll cover these items: 0:00 – Start / Review of… Read More »Numbered ACL Syntax

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What are Access Control Lists?

Ed Harmoush — Fri, 17 Jul 2020 18:19:58 +0000

This is the first video in an eight-part video series which discusses the concepts and configuration for Access Control Lists, or ACLs. In this video we answer the core question: What are Access Control Lists? We discuss the idea of simply identifying traffic with an ACL, and provide examples of the many different ways of… Read More »What are Access Control Lists?

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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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