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you doing an ip range? or just selected ips? (just wondering if you're covering dynamic PIs, I've been on the wrong side of a stick when someone else has been banned off a site and my IP was in the same range)
You're unlikely to be hit unless you did something ...
i was using a 3G connection at the time, so i probably was part of an IP pool from the isp, that the forum blanket banned..
there were thousands of users on that forum, a reset of connection fixed my issue, so it'll unlikely happen on the pool for dynamic ip range banning.
i still find it funny that people are trying to find a hole to get into the server via the api/front end ...