Sometimes it may be server saturation, other connection problems proxy and so on. I recommend you to not put the hour for auto update to an exact time ie 2:00 PM or 1:00 AM try putting not even numbers like 9:17 or 10:41, and see if you continue getting these errors.
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...