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In 15x when you added a range. It was separate windows so it was easy to put in. In the listing there were no spaces on the range. In 16x when you add a Range, SM16, will accept any formating. IF there are spaces between the ip blocks and the dash (xxx.xxx.xxx.xxx - yyy.yyy.yyy.yyy) The blacklist will NOT block connections. I would suggest either a pop up to correct the bad formatting or a change to the input window to fix that.