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New Member

ICMP

What is the difference between

icmp permit any echo OUTSIDE and

icmp permit any echo-reply OUTSIDE

...

Which one of the two will stop me from disabling pic to the ASA from outside.

3 REPLIES

Re: ICMP

Suppose Device A wants to see if it can reach Device B. Device A begins the test process by sending an ICMPv4 Echo message to B. Device B, when it receives the Echo, responds back to Device A with an Echo Reply message. When Device A receives this message, it knows that it is able to communicate (both send and receive) successfully with Device B.

Can you rephrase your 2nd question?

New Member

Re: ICMP

So does this mean that i need to allow both echo reply and echo for me to ping the device

Re: ICMP

Echo-reply for sure and if you'll be pinging from the device, you'll need echo as well.

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