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How to hide an access-list applied? PDF Print E-mail
Written by CiscoNET   

Sometime, you even don't want to reply ICMP unreachable message response back to requester. It's very simple. Here is how you do it. (Assume we already have an access-list was applied on Serial0/0)

 

Cisco_Router#config t

Cisco_Router(config)#interface Serial 0/0

Cisco_Router(config-if)#no ip unreachables

 

That's it. When someone send ICMP packets to your serial link, it won't replay any ICMP message. So sender would think that the link was down.

 

 



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