Can you please provide the output of 'show nameif' and 'show ip addr'? If you are referring to pinging the actual IP address of the "far-side" interface, this is NOT supported on any Cisco Firewall, unlike Cisco routers.
If you are pinging hosts off of the interface (not the interface itself), the output of 'show nameif' as above will provide insight. If the two interfaces are at the same security level, it may also be 'same-security-traffic permit inter-interface'.
Hope this helps. If you still need assistance, please provide the output requested above.
As Vikram stated, the 'ping inside' command implies to send the ping out the inside interface. The FWSM maintains a route table on a per-interface basis. As a ping 'inside' command, we'll reference the route table for the 'inside' interface.
These route tables also come into play when a bad translation is formed through the FWSM. The route table for the egress interface will be referenced when processing the packet.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...