Reflective access-lists allows the router to pass “established” tcp traffic that has been previously allowed via another ACL. Due to routers to not having (by default) a state table, this ensures that you do not have to create additional access list entries to allow the return traffic of a permitted tcp session.
(config)# ip access-list extended INTERNET_FILTER
(config-ext-nacl)# permit tcp any any established
Rick Donato is a Network Automation Architect/Evangelist and the founder of Packet Coders.
Latest posts by Rick Donato (see all)
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