MicroNugget: How to Configure Extended ACLs on Cisco Routers

In this video, Jeremy Cioara covers extended ACLs on Cisco routers. ACLs are powerful documents that contain lists of statements that govern which devices can and cannot access other devices. By configuring extended ACLs, you can regulate the traffic on a network and keep traffic moving fast and secure.

One of the many things that a well-configured extended ACL can do for a network is prevent a given IP address' traffic from reaching another IP address. That's because an extended access list is really nothing more than a document with a row of statements that permit or deny traffic based on rules you can set up. That can be protocol, port number, source, destination, time range, and more.

When it comes to configuring an extended ACL, just like driving to Disneyland only to discover it's closed would waste time and energy, the best practice is to host extended access lists as close to the source as possible. See how to write rules that identify source IP, its protocol, and the many other filters you can use to manage network traffic with extended ACLs.

Start learning with CBT Nuggets:

[alirezaabrishami]

Jeremy, I really love the way you teach Cisco!!!
Thank You!

[Three_Dog_Gaming]

Definitely valuable! Had a co-worker leave the company that was basically master of all things Cisco and we're trying to interpret what he left us with!

[cbtnuggets]

Mahad, you are correct! This is one of Jeremy's newest MicroNuggets.

[chrisallen]

You are the best video instructor on the web. Keep it up, just the way you are doing it.

[robertsmooth]

HI Jeremy This course on extended ACLs on Cisco routers is very . But it too late me I'm going to retire... Jeremy your awesome teacher and I want to thank you and Micro Nugget for educating
for those who are pursuing a high advance technology career. Thanks you and even If I retired I continue to login from time to time. I'm Network Engineer

[florentvespit]

am from africa, i've learned CCNA, but your videos make me understand more and more every days. thanks a lot

[mariorodas]

Jeremy, i love your videos. I'm studying for SBA for CSCO-220 AND CSCO-221. This video, and one other of yours, has been super helpful in remembering which direction to place acl. Thank you!

[MrAadeyemo]

That was very straight to the point Jeremy and delivered in a not-boring manner.

[gchlion]

I just want to say... AMAZING. Jeremy is the best in this of cbt ! He has the ease to explain the stuff in very cool way. NICE!!!

[AmazinglyAwkward]

I'm actually doing a comptia exam not the CCNA but this was still super super helpful, it was definetly more helpful seeing a terminal. Thanks so much!

[jeremymayer]

From one Jeremy to another! Thank you! Really helped!

[incognituadictus]

good and clear explanation, i like the "be the router" analogy!

[WiseK.D]

Jeremy thank you so much you cleared most of my confusion.. I Don't know if you have already done this but can you make a video on acl protocoles I mean all of them and explain their use and how they work . That will be great .

[libertywraith]

you are THE MAN Jeremy C . your instruction has been so very effective for me....and apparently everyone i talk to.
thank you!!!

[cbtnuggets]

Thanks for your question! If you would like you can submit a formal request for this MicroNugget from the link above found in the description.

[Gamelover]

Thank you so much for the video ! I’m currently in a CNT160 class and ACLS are a struggle for me, we just started implementing NAT so this will help me very much ! Thank you 😁

[petrithysaj]

Thank you very much. I've my exam coming up fast and you are helping in my passing it.

[seepaknanda]

Jeremy really your teaching method on Cisco is excellent thank you.

[cbtnuggets]

Simon, if you would like to know a little more, feel free to request that MicroNugget in the link found in the MicroNugget description.

[adammohamed]

Thank you, honestly speaking, you are amazing instructor.