Home Security Security General How to hide an access-list applied?

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.

Last Updated (Tuesday, 05 May 2009 21:51)

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