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Applying ACLs for Network Security

Added on -2019-09-21

This guide explains how to apply Access Control Lists (ACLs) to secure your network from unauthorized access. It covers ACLs for internet and public backbone, Australian LANs, South East Asian LANs, and European LANs.
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SECURITY BY APPLYING ACLSA. ACCESS TO INTERNET AND PUBLIC BACKBONE1) AND 2)access list 101 permit tcp any host 160.168.35.129 eq httpaccess list 101 permit tcp any host 160.168.35.129 eq httpsaccess list 101 deny any anyinterface serial S0/0ip access group 101 in 3)access list 100 permit tcp 160.168.0.0 0.0.255.255 any eq httpaccess list 100 permit tcp 160.168.0.0 0.0.255.255 any eq httpsaccess list 100 permit tcp 160.168.0.0 0.0.255.255 any establishedaccess list 100 deny ip 160.168.0.0 0.0.255.255interface serial S0/0ip access group 100 outB. THE AUSTRALIAN LANS4)SYDNEY ROUTERaccess list 105 permit ip 160.168.16.0 0.0.0.255160.168.35.129access list 105 deny any any interface Ethernet E1/0ip access group 105 inAdelaide ROUTERaccess list 105 permit ip 160.168.35 0.0.0.255 160.168.35.129access list 105 deny any anyinterface Ethernet E1/0
ip access group 105 inBrisbane routeraccess list 105 permit ip 160.168.24.0 0.0.0.255 160.168.35.129access list 105 deny any anyinterface Ethernet E1/0ip access group 105 in5)SYDNEY ROUTERaccess list 106 permit ip 160.168.16.0 0.0.0.255 160.168.35 0.0.0.255access list 106 permit ip 160.168.16.0 0.0.0.255 160.168.24.0 0.0.0.255access-list 106 deny ping any anyinterface serial S0/1ip access group 106 outinterface serial S0/2ip access group 106 outAdelaide ROUTERaccess list 106 permit ip 160.168.35 0.0.0.255 160.168.16.0 0.0.0.25access-list 106 deny ping any anyinterface serial S0/0ip access group 106 outBrisbane router access list 106 permit ip 160.168.24.0 0.0.0.255 160.168.16.0 0.0.0.255access-list 106 deny ping any anyinterface serial S0/0ip access group 106 out6)SYDNEY ROUTERaccess list 107 permit tcp 160.168.16.0 0.0.0.255 160.168.35.149 eq sshaccess list 107 permit tcp 160.168.16.0 0.0.0.255 160.168.35.136 eq 1433

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