Duck.quackprep.net

The "duck" part is a dead giveaway. It strongly suggests ( duckdns.org ), a popular free dynamic DNS service. Thousands of developers use *.duckdns.org domains to point to their home servers, Raspberry Pis, or VPN gateways without paying for a static IP.

At first glance, it looks like someone had fun with the autocorrect feature. "Duck," "Quack," "Prep" — it sounds like a training course for waterfowl. But dig a little deeper, and it starts to look like a very specific piece of infrastructure. duck.quackprep.net