I installed JU BlockIP and put my own IP address in the whitelist and a list of bad IP addresses from the internet into the blacklist. Unfortunately, there was a bad blacklist IP address x.x.x. (missing the last part) which should have been x.x.x.*. Of course I tested the site before going live. My testing of the site still worked because my own IP was whitelisted. But every other user in the entire world. got an error page!!
So, as an enhancement, can we please validate the whitelist & blacklist to make sure that the IP addresses listed are all valid before we save?
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