Anyone have any suggestions on how to learn ACL's?

ACLs seem to be a pain in the ass, anyone have any suggestions on how to learn them? Is it just practice like subnetting?

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RouteMyPacket

Network Simulator: Available Router Labs.

and

https://wikis.engrade.com/network1/acl

lsud00d

RouteMyPacket wrote: »

https://wikis.engrade.com/network1/acl

This is a good link, thanks RMP!

I was actually super sleuthing an issue today on a SAN switch and it's extended ACL's...I deduced what the WCM was doing but never knew exactly what it was. Hooray for learning new things

gbdavidx

How do you know where to apply the access list? For example, Network simulator: Router Access List Configuration why would you apply that to S0 and not on the other side of the Router 3? or applied going out?

late_collision

You've asked a good question, and for the most part, I think it's a bit of a poor example. I believe the clue lies in step 2(b) " All hosts on the subnet as Bret should not be able to access hosts connected to R3." If additional hosts were added to another interface off of R3 and we applied the ACL outbound on the port facing network 214.47.8.0, the conditions of the question would not be satisfied.

But again, these are all what-if's, and when you play the game, the integrity of the question is jeopardized.

I've always hated ACL questions, they all seem fuzzy at best.