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Year 2 - Chapter 6/Cisco 3 - Module 6 ACLs - page 9 / 40

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ACLs Command-Line Basics

Keyword access-list required; identifies an ACL item.

ACL number (50 above) is the identifier for this particular list.

Things to know about ACL numbers:

Standard IP ACLs use numbers 1–99.

Extended IP ACLs use numbers 100–199.

Each item in the list will have the same number.

No two ACLs on a router can use the same number.

ACLs and ACL numbers are router-specific.

Keywords permit / deny allow or prevent passage, respectively.

Balance of the ACL is the criteria (rules for filtering).

Router#config t

Router(config)#access-list 50 permit 192.168.1.10

Router(config)#access-list 50 deny 192.168.1.0 0.0.0.255

Router(config)#access-list 50 permit any

Router(config)#interface Ethernet0

Router(config-if)#ip address 192.168.5.1 255.255.255.0

Router(config-if)#ip access-group 50 out

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