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Takeaway: Access control lists (ACLs) are a fundamental part of working with routers. How much do you know about managing these vital gatekeepers? David Davis lists 10 things every administrator should know about working with Cisco IOS ACLs. People who read this, also read... Playing with Cisco access lists Use advanced parameters on your Cisco IOS ACLs Traffic filtering with Cisco access lists: Why, how, and what to consider Learn additional uses for Cisco IOS access control lists Protect your network with the Cisco IOS Firewall If you work with Cisco routers, you're more than likely familiar with Cisco IOS access control lists (ACLs). But that doesn't mean you know all there is to know about these important gatekeepers. Access lists are an integral part of working with routers, and they're vital to security. Because ACLs are a fundamental part of router administration, I want to address 10 things you should know about working with these lists. If you're new to workin