Developer Meetpatty just released a version of HENkaku that you can host on your local server, which allegedly removes the dependency on an internet connection to run the hack (I have not tested this yet).
HENkaku-webserver is a windows-only thing for now as it relies on the ASP.Net Framework. HENkaku-webserver requires Windows, IIS server + asp.net 4.0, and Fiddler 4.
The setup is not over complicated, but this is not a “plug and play” solution either. You’ll need some level of understanding of what you’re doing with your webserver to set things up correctly. Additionally, as the developer warns, there might be security concerns here with using his release. He gives the following disclaimer:
By using this software you agree that I will not be held responsible for any loss/damage/fire/doomsday as a result of its use. Please be sure to check the output of this service against known good payloads generated by go.henkaky.xyz before using on your vita. You have been warned!
Note that setting everything up requires you to actually go to the official henkaku website to get the payload at least once. Don’t wait until after you lose internet access (or the HENkaku site goes down) before you try and get a local version running.
What will you do if you can’t access the HENkaku official site?
It is worth noting that Yifanlu and team molecule have strongly hinted that HENkaku will ultimately become open source for people to host it locally. My guess is that they are waiting for an official Sony patch before releasing anything specific.