IP blocking is an automatic function when too may failed login attempts occur, usually from someone trying to hack into your account. The block only lasts one day. The IP Blocker was installed due to users accounts being Brute Force hacked.
My IP is also blocked somehow, if my account would have been blocked temporary I could understand the mechanism, but I could still login with a proxy. I suspect the IP blocking function is not configured properly or too aggressive.
IP blocking will ban a public IP, not your private one.
So it will block a whole neighborhood, a part of town, an ISP, etc etc, depending on a lot of factors.
Now, if you have a public IP, that would block only you.
I do have a public IP from which I'm the only user so I don't understand why my IP is blocked ar the moment. I'd this once before when I was also visiting the site from Linux, not sure if it was Firefox or Chromium, but I suspect that something gives a false trigger to the IP block or something like that. I wasn't even trying to login and I it's very unlikely my Linux box got hacked and they're trying to login at this site via my connection.
Are you a certified ISP?
Do you have web servers on 24/7 that need access from outside?
If you do not have those, there is no need for public IP, and that is a paid service, not something you can do or change.
But,
if you do have a public IP and it was blocked, check your wireless equipment as someone is using it to hack here.
So ...
