Sorry for posting this issue here as the GNS3 guys seem dead and they do not reply for weeks.
I got an ASA running software 8.4(2). Now, i want to downgrade it to software 8.2(1).
Here are the steps i've done so far:
1. Uploaded the 8.2 image to the appliance via tftp.
2. Tried to issue this command: boot system flash:asa821-k8.bin but got this error "Unable to set this url, unsupported file system."
3. Tried the downgrade facility in ASDM but got this message "The software will be updated and the appliance will reload. ASDM will now exit." and the appliance didn't get reload as the message stated.
4. Reload it manually but nothing changed, the same OS 8.4 still running.
I got my PIX (instead of ASA) running using software 8.0(2). In the beginning, that software worked with some weirdo issues such as simple ping issues from inside host to PIX's interface. After 2 hours, i decided to try another image which is the 8.2 but i didn't know that it is not supported in GNS3. When i run the GNS3 as an administrator, these issues are gone, even though i still do not understand what is the relation between the windows administrator account and the PIX's software.
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...