If you are running PIX 7.x, try the following command:
show vpn-sessiondb summary
This will give you a great deal of that information. There are other options for the show vpn-sessiondb command. You may need to script the execution of this command to get all the information you are looking for (and perhaps depending on the exact level of detail you require).
Another great option (especially for item 3) is to capture the syslog messages that occur for VPN sessions.
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...