We recently moved to Windows 7 . Certain users when trying to download an attachment from yahoo are having issues.When they click on download, the attachment gets scanned for virus, but then the download window gets grayed out and nothing happens.
That appears to be a authentication redirection. Not sure if it was authenticated or not, more accesslogs would need to be revealed. Try to exempt that site from authenticaiton based on client ip address or destination site, like below:
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...