The security lab I've been developing is located on my university's campus network. If I want to work from home (which I did this week), I need to VPN on to campus. If I then want to work within the security lab I need to VPN on to the lab. I call this dual VPNing! For both VPN connections I opt out of using the VPN as my gateway. So essentially I utilize the campus VPN for a secured connection to my security lab VPN server, then the security lab VPN to access the lab NAT. This leaves my innocent laptop with quite a large routing table, but she's a trooper and doesn't complain.
I've been working on solving a very specific problem. I'd like to have access to a general security lab on campus such that myself and a few friends can practice for a cybersecurity competition. The university has a great Security lab, the only problem is, everyone loves using it and it has relatively strong physical security. Either way, a few students cannot walk in at 3:00AM and start running attack scenarios. Go figure.