Access Control List (ACLs)
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Revision as of 22:38, 9 September 2006
Routers provide basic traffic filtering capabilities, such as blocking Internet traffic, with access control lists (ACLs). An ACL is a sequential collection of permit or deny statements that apply to addresses or upper-layer protocols.
ACLs are lists of instructions you apply to a router's interface. These lists tell the router what kinds of packets to accept and what kinds of packets to deny. Acceptance and denial can be based on certain specifications;
- Source address
- Destination address
- Port number
An ACL can be created for all Routed Protocols
