Signatures are still supported on it, but only if you have kept your contract (Cisco Service for IPS contract) up to date. If you do not currently have a contract, then it is too late to get one. The last date to get it started under a contract was way back on May 31st, 2006.
So if you don't have already have a contract, then it likely won't be worth your effort to add interfaces. You need the contract to get a license, and you need the license to keep the signatures up to date.
If you actually do have your contract still in effect on an IDS-4235, then there were 2 interface card options, but only one of which is still being sold.
The IDS-4FE-INT= is a 4 FE interface card that can be used in the IDS-4235, and is still being sold by Cisco.
There was also a Single Gbps interface card as well, but that card is no longer being sold by Cisco.
You are limited to just one of these cards at a time in the chassis.
And only these 2 cards are supported. other interface cards will not be recognized by the software.
Well if it is a challenge you want, then it is definately a challenge you've got. The biggest challenge will just be finding that specific card since it is so old.
The FE card supported back in the IDS-4230s was the SMC 9432TX.
If I remember right it came in 2 varieties. One with WOL and one without.
I am not posititve but I think that only the variety without WOL was supported.
I remember testing and seeing problems when the WOL was added by SMC, but I don't remember if we made software changes to correct the issue in the IPS software or not.
Also only 1 card was supported in the chassis at a time. The software was not able to fully recognize and configure mutltiple cards if I remember right.
Of course, all of this is only pertinent if you are actually going to try and run IDS version 4.x on it.
Howver, if you are like others who just want to load a generic Linux or Windows image on it and use it as a standard PC (not an IDS), then you can probably use almost any NIC that works on that bus and has driver support in whatever Linux (or windows) image you want to run.
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...