http://xmrhfasfg5suueegrnc4gsgyi2tyclcy5oz7f5drnrodmdtob6t2ioyd.onion/onion-services/overview/index.html
This could happen if you are in a university campus, an office, an airport, or pretty much anywhere.
Onion services don't need open ports because they punch through NAT. They only establish outgoing connections. The Onion Service Protocol: Overview Now the question becomes what kind of protocol is needed to achieve all these properties?