Networking
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4 min read
AS-Path Filtering
2014.10.15Before we get into the how, let’s talk about the why.
Acl
Networking
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1 min read
Quite a while ago I had a need for some network duct tape… Policy Based Routing while useful should only IMHO be used as a temporary fix.
Security
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2 min read
Time-based ACLs
2011.04.25Ever since Cisco released IOS 12.0.1T we’ve had the ability to broaden the reach of the extended ACL to allow the influence of time.
Networking
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5 min read
Unlike subnet masks, wildcard masks allow you to use discontiguous bits which enable you to match on a range of values.
Networking
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4 min read
IOS ACL Resequencing
2009.11.23This is one of those tricks you wish you learned about 10 years ago, but never did. You know how easy it is to mess up a nice looking access list.