netsh advfirewall firewall add rule name="MaplestoryFix" protocol=TCP dir=out action=block remoteip=8.31.99.133and press enter. This should work immediately without having to restart maple or your computer. If it doesn't, make sure your firewall is turned on, that you copied the command correctly, and that you are running in an admin command prompt.
netsh advfirewall firewall delete rule name=MaplestoryFixand press enter.