In my experience the intake for the ASA is on the side with the connections (power, ethernet, etc). The exhaust is the side with the Cisco faceplate. I don't know if the 5510 is much different, but I can see 4 fans on the faceplate (exhaust) side.
As for finding the temperature -- good luck. Please post back if you find the way. I can't find a command or even an SNMP OID that will return the temperature info.
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...