User blog comment:DaNASCAT/Technical Update: June 26, 2017/@comment-126761-20170628152707

Addendum: IPv6 support is now enabled! This means you will start seeing some IPv6-style IPs instead of IPv4 IPs for anonymous users, but they will behave much the same.

Of course, if you spot any problems, do let us know! (This will be mentioned again in the main blog post later today.)