<quote name="Ori Livneh" date="2014-03-14" time="18:22:26 -0700">
Vagrant Cloud is a new service from Hashicorp that strives to make it easy to share Vagrant boxes and to collaborate on provisioned instances together. It's in very early beta, but I have started poking around a little, and it looks interesting. I don't quite know yet how it will work with our extensive custom plugin architecture, but I suspect that this is not an insurmountable problem. Hashicorp is also committed to a freemium model that makes the software stack free (as in speech) and the basic tier of cloud services free (as in beer), so it may be possible for us to have tighter integration with their service without compromising our values.
There's also a totally libre solution called pagekite https://pagekite.net/
I've used it with vagrant and it Just Works(TM).
They have a Free for FOSS tier: https://pagekite.net/signup/?more=bw#fff
Just for completeness's sake :)