Access Control List

Capodecina
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Joined
31 Dec 2003
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Barrow-In-Furness
Having some problems with my ACL..

access-list 103 deny ip 172.16.0.0 0.0.255.255 172.16.32.0 0.0.7.255

I'm trying to deny..

All addresses from reaching the top half of 172.16.32.0/20

So in other words, stop anyone reaching 172.16.40.1 to 172.16.47.255, but allowing them to reach 172.16.32.1 to 172.16.39.255

That ACL does the opposite, I can reach the top half of addresses but not the lower, my brain has actually burnt out. I thought the wildcard would just be 0.0.8.255 but no joy
 
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