RouterA#configure terminal
RouterA(config)#access-list 1 remark stop all traffic whose source ip 1.1.1.2
RouterA(config)#access-list 1 deny 1.1.1.2 0.0.0.0
RouterA(config)#access-list 1 permit any
RouterA(config)#int s0/0
RouterA(config-if)#ip access-group 1 in
RouterA#show access-lists
Standard IP access list 1
Deny 1.1.1.2
Permit any
Now verify these configuration on router with command us under:
RouterA#show ip int s0/0
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