Where is the problem when user cannot ping ASA inside ?

Hi the topology is like this: User PC (wireless) ----- switch1 ---- swithch2 -----(inside)ASA. All switch are layer3 switch.
Switch1, switch2 and ASA can ping each other. PC, switch1 and swich2 also can ping each other. but the PC and ASA cannot ping each other. When PC ping ASA, the ASA can get debug message "ICMP echo request from (PC ip address)" but not "ICMP echo reply from..."

I think the issue is in switch. Do you think so ? Thank you
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Jody LemoineNetwork ArchitectCommented:
Do you have "permit icmp echo inside" enabled on the ASA? If not, you need this to ping the interface. As for pinging back, make sure that the Windows firewall is permitting ICMP echo messages as well. Microsoft turns this off by default. If you're getting messages on the ASA indicating that it is receiving a packet, it's not likely to be the switch.

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