I've been running SVR4 here at home on period hardware for quite some time, and it's getting time to get it out in the big world. So here's what I've done and still have yet to do:
I've built a telnet shell on my modern machine that allows anyone with an account on SVR4 to ssh into the modern machine and automatically be telnetted onto SVR4. This is good because wyvern, the SVR4 machine, is on a private, unroutable network. community, this machine has two network interfaces, the public side (the one you are using to read this), and a private side. It doesn't route, of course, but once here, you can reach wyvern.
So I wrote a little C program that sets some parameters and manages a bit of security, and executes a telnet to wyvern. It seems to work great, and should be reasonably secure.
I'm happy to let interested parties play with my SVR4 machine.
Next, I want to start running UUCP again. I'm thinking UUCP over tcp, and maybe a small, private USENET with geeky, retro kind of groups. Anyone interested?