Understanding Access Control Lists | Network Fundamentals Part 14

Understanding Access Control Lists | Network Fundamentals Part 14
ACLs, or Access Control Lists, are one of the fundamental ways to control or influence the traffic flowing through your network.

They can be used in several different ways, but in this video we’ll look at how to use ACLs as a packet filter. Packet filters use ACL’s to control traffic that is and is not allowed through the network.

An ACL is, as the name suggests, a list containing Access Control Entries (or ACE). Each entry is a rule, with ‘match’ conditions. If traffic matches these conditions, then an action (permit or deny) is applied.

Standard ACL’s are the original type, and can only match based on source address. Extended ACLs are newer can can match on a variety of criteria.

There are several ways that ACLs can be configured. Numbered ACLs, is where each entry in the ACL is identified by a number. Named ACLs are more advanced, and group the entries inside a container.

This video contains a lab, where you can see how to configure all these options.

CCENT/CCNA ICND1 100-105 Official Cert Guide (affiliate):

In the next few videos, we’re going to have a look at ARP, DHCP, and DNS.

Overview of this video:

0:00 Introduction

0:28 What are ACL’s For?

1:00 Anatomy of an ACL

3:11 Wildcard Masks

5:45 Quiz Time

5:55 Types of ACLs

7:49 Applying ACLs

9:32 Quiz Time

9:42 Lab

20:48 Quiz Time

21:02 What about Firewalls?

LET'S CONNECT

#NetworkDirection

[TheDogtag]

finally a channel that acturly make content where i don't fall asleep trying to learn. Thanks friend!

[Gksec-lrxg]

Perfect, i'm working on ACL's currently. This is just... PERFECT!!!

[lagimmediafiles]

Nice Content and Great Channel i refresh my Lesson in Networking in IT, God Bless

[chicknwingd]

Thank you ! Very well explained. Blessings from Germany

[abhishekdanej]

In earlier videos we discussed that routers are primarily layer 3 devices. And devices on a lower layer have no information about higher layer attributes. But in case of ACLs, routers are able to allow our deny traffic basis port numbers.

[fearless_chrollo]

very helpful for my exam, thansk, liked and subbed:)

[roshanmr]

great videos that you are making Sir... for your Q1 answer will be 1st and 4th IP's since CIDR for this wildcard mask will be 20, and these 2 IP's match network IP given...

[renielralfdelacruz]

this is really good work! create more videos!

[moviemovie]

Nice Video! Well said! Everything is organized! Will subscribe to your channel! <3

[susiloputinsalim]

What is the basic deifferent between ACL and Firewall features? Are both the same?

[michaelo]

uugh i read cisco entire 2 chapters for ACLs and am swamped with information- thanks for the vid. I learned the function of 'do' !

[hazemal-hyari]

there is a typo from the same network topology from the last video its the subnet ip address thanks for your videos btw

[KenSherman]

ACLs were also a tricky concept starting out.

[teamstandliberia]

can I have a video on how to set up a computer lab?....Please

[sebastiengueritey]

There is a mistake at 10:00 with the VLAN subnets. They are both on the 192.168.10.X network. Great job by the way.

[alexbaronov]

Question: you said that the first ACL is an extended ACL, but it has numbers in the range 1-99, which you said is the range for standard ACLs. Which is it? Thank you. Edit: never mind, looks like you meant the numbers for the Access Control Lists must be in the range, whereas the entries can have any number. Just seemed confusing since the 6:43 entries contained entries as well, causing me to assume they're indeed entries rather than actual lists.

[martinindustrialtirane]

Are the answers of the quiz the first and the last?

[calinmuntean]

The video from the begining of the course is from Romania

[gayathrithree]

5:50
is b) the correct answer?
10.22.16.0

[danciulescurazvan]

why is there a video fragment with traffic in Romania and more important a commercial to the most controverted party (the Social Democrat Party) that ever governed in Europe in the last 30 years