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In network operation and maintenance, in order to control the security of network devices, we often restrict the source address of login devices. We can log in through the device ACL, Cisco provides the following mechanisms that can be fully restricted. where the source address in acl is the address from any interface.

ip access-list extended login-control

permit ip host 10.13.39.254 any

permit ip host 132.77.124.153 any---Source address is the address that needs to be released

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line vty 0 15

access-class login-control in---direction in

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