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Hey burning - Xortify is a very important security tool. It is cloud security which is all the buzz and thats right xoops is the only cms that has anything like a condom like protector from infectious users..
If you manually enter in an IP ie: has one i typed in ::
129.56.25.25 it will be sent to the xortify cloud as populated as it can be.
I would not worry about old ones, xortify clears the bans when they timeout at 3 months anyway with an hourly cron that runs on the site.
I would recommend if you delete the IP if you know they are old before installing xortify, but this is not an important step.