Quick access list question..

I know it's been covered here a lot, and there's one thread in particular that I wish I could find, but my searching skills are failing me right now...

Basically I'd just like it if someone could explain to me how one is supposed to apply access lists. I know that you're supposed to apply extended lists close to the source and standard access lists as close to the destination as possible, but can I get an explanation why? Someone explained it from the perspective of being inside the router that was really helpful but as I said, I can't find that thread.

Sorry for the repetitive question. If someone can find the thread I'm talking about I'd be more than happy

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bmauro

This one?

http://www.techexams.net/forums/viewtopic.php?t=18732

Paul Boz

Yep that's the one, I was searching for "access list" in the thread title

Kaminsky

So the real trick with these questions is not really the syntax of the ACL itself (pretty straightforward THEN.. IF statements really) but where you place the ACL on which router in the given network and on which interface on that router and in which direction on that interface?

I'm going through ACLs at the moment and I thought it was going a little too easy!

Paul Boz

Kaminsky wrote:

So the real trick with these questions is not really the syntax of the ACL itself (pretty straightforward THEN.. IF statements really) but where you place the ACL on which router in the given network and on which interface on that router and in which direction on that interface?

I'm going through ACLs at the moment and I thought it was going a little too easy!

It's more of a combination there of. Also, wildcard masking is a huge part of it too.