I cannot comment on wether you've been "ripped off". However, the 4220 was a legitmate version of the Netranger and is (I believe) newer than the NRS boxes. The CPU configurations were dual P2-400 and single P3-600. We did switch to IDE drives when Ultra-DMA became available...the performance is comparable with lower costs. The current generation are the 4210 for up to 45Mbs (1RU, P3-Celeron 566) and the 4230 (original 4RU, dual P3-600). One of the limitations of the NRS boxes is total memory. They originally had 64-128MB and you need 512MB for the latest software releases.
Depending on your speeds and feeds, you may be alright. However, you should check your software revisions...this may be where you are in trouble. The latest mainline rev. is the 3.0 release. The 2.2.1.x train stops at 18.104.22.168 and is in bug fix only state (i.e. no signature updates). There is a 2.5 release train that will soon be moved to bug-fix only status as well. I am concerned with whether or not your hardware will support the 3.0 release train. Certainly it(3.0) will run, but I'm not sure what performance you would get. If you care to send your hardware configurations offline (email@example.com), I'll get with the QA folks and let you know where you stand.
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...