If you are having trouble re-imaging a MARS appliance there are a few things you can do to try and fix the issues.
First, make sure you have enough disk space free on your computer. IE downloads to a temp directory then copies it to the directory you want to use. Be sure you have 2x the space you need.
Next, try disabling your anti-virus software temporarily. It may be choking on the large file.
Trouble using the image:
The first thing to do is to check the download was successful. Use a program to calculate the MD5 hash of the .iso image and compare it to the hash posted on Cisco.com. HashCalc is a good program for this, and it's free.
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...