Have you read the whitepaper and have you tryed with the CISCO-PROCESS-MIB-V1SMI.my MIB.
I never used CastleRock but it works without problem for MRTG and Solarwinds and I have never had troubles to get all interface stats.
I thought it might be problem with the MIB that you are using that might use the wrong OID.
PIX Firewall Software Versions 6.2.x and later: Previous MIBs and CISCO-PROCESS-MIB-V1SMI.my.
Note: The supported section of the PROCESS MIB is the cpmCPUTotalTable branch of the cpmCPU branch of the ciscoProcessMIBObjects branch. There is no support for the ciscoProcessMIBNotifications branch, ciscoProcessMIBconformance branch, or the two tables, cpmProcessTable and cpmProcessExtTable, in the cpmProcess branch of the ciscoProcessMIBObjects branch of the MIB
I managed to figure out the problem... SNMPc was trying to poll the IP addresses of the interfaces to get SNMP info. e.g to get the status of the oputside interface it polled the outside interface IP and got no response. I modified the program use the inside interface to gather SNMP info for all the intefaces and if works fine. (hope that makes sense)
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...
[toc:faq]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 and UDP are I...