FX on Cisco IOS Rootkits

Now that some people actually talk about IOS rootkits, interesting tidbits show up. One person asked me if we have tested CIR with the Russian IOS rootkit that was for sale a few years ago. No, we didn't, but good to know that these exist.
Russian IOS rootkit... interesting. How much proof do we need to Monitor our routers?
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http://www.shrubbery.net/rancid/