No need to use UCSD. Cloud based server(s) work just fine. Places like AWS drip with bandwidth.
Is AWS able to run an IPIP gateway? I am currently trying to migrate an IPIP gateway from the "Hosted Raspberry Pi" that it is now to a VM that is being offered as a replacement, but it turns out that the "Apache Cloudstack" that this (and apparently many other) hoster uses to deploy VMs is unable to pass other network traffic than TCP and UDP. (and replies to outgoing traffic)
Good enough for OpenVPN and will probably work with IPsec and other VPN protocols, but not suitable for an IPIP gateway that also accepts incoming traffic. I am now looking for a solution. Of course I can make a VPN to our gateway, but this system was a test environment for an IPIP gateway. When IPIP goes away, I no longer need it. However, I could also use it to draft an example of how to setup a VPN service on a Linux machine.
Rob