This has been a really valuable thread to read; as I must say, your assessment that the "available documentation ... lack[s] detail and is ambiguous at best" is, if anything, generous. There's no justification for the level of uncertainty the average...

The difficulty is, Cisco no longer supports the 501--too bad too; so I don't think you can buy an upgrade to the inside hosts. In fact, I'm not sure the 501 ever supported more than 10 inside hosts. But, if it did (and I frankly do not remember--I ha...