It's either another bug in this release or you're on a dynamic IP address, and a spammer on your network tried to attack the system.

In the second case, the solution is to shut down your machine (not just reboot) and start it up again so that your IP resets itself to something different.

__________________
And you, to whom adversity has dealt the final blow
With smiling [faces] lyin' to ye' everywhere ye' go
Turn to, and put out all your strength of arm and heart and brain
And like the Mary Ellen Carter, rise again.