topic ICMP in Network Security https://community.cisco.com/t5/network-security/icmp/m-p/1336918#M977974 <P>What is the difference between</P><P>icmp permit any echo OUTSIDE and</P><P>icmp permit any echo-reply OUTSIDE</P><P>...</P><P>Which one of the two will stop me from disabling pic to the ASA from outside.</P><P></P><P></P> Fri, 21 Feb 2020 11:44:11 GMT anthic.lobo 2020-02-21T11:44:11Z ICMP https://community.cisco.com/t5/network-security/icmp/m-p/1336918#M977974 <P>What is the difference between</P><P>icmp permit any echo OUTSIDE and</P><P>icmp permit any echo-reply OUTSIDE</P><P>...</P><P>Which one of the two will stop me from disabling pic to the ASA from outside.</P><P></P><P></P> Fri, 21 Feb 2020 11:44:11 GMT https://community.cisco.com/t5/network-security/icmp/m-p/1336918#M977974 anthic.lobo 2020-02-21T11:44:11Z Re: ICMP https://community.cisco.com/t5/network-security/icmp/m-p/1336919#M977977 <HTML><HEAD></HEAD><BODY><P>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. </P><P></P><P>Can you rephrase your 2nd question?</P></BODY></HTML> Wed, 14 Oct 2009 19:03:18 GMT https://community.cisco.com/t5/network-security/icmp/m-p/1336919#M977977 Collin Clark 2009-10-14T19:03:18Z Re: ICMP https://community.cisco.com/t5/network-security/icmp/m-p/1336920#M977982 <HTML><HEAD></HEAD><BODY><P>So does this mean that i need to allow both echo reply and echo for me to ping the device</P></BODY></HTML> Fri, 16 Oct 2009 15:27:49 GMT https://community.cisco.com/t5/network-security/icmp/m-p/1336920#M977982 anthic.lobo 2009-10-16T15:27:49Z Re: ICMP https://community.cisco.com/t5/network-security/icmp/m-p/1336921#M977988 <HTML><HEAD></HEAD><BODY><P>Echo-reply for sure and if you'll be pinging from the device, you'll need echo as well.</P></BODY></HTML> Fri, 16 Oct 2009 17:48:52 GMT https://community.cisco.com/t5/network-security/icmp/m-p/1336921#M977988 Collin Clark 2009-10-16T17:48:52Z