Warcraft 3 3.46 error. . . . as always

Hello. I have Warcraft 3 installed and I played in custom maps with battle. net before. Today after some time break I wanted to play some custom maps. When I tried to enter Battle. net(In Warcraft 3 TFT) he said me the account don’t exist. And I have to create another (Sparrowrus). Well I made that and FIRST Verify Email link and only AFTER that I try to enter Battle. net again. Result: is 3.46
Which if I remember correct IP ban for some reason. . . . . . .
Please answer me why/how I get banned IP. And can it be unbanned?