If my ISP does not provide it, am I going to be in a pinch, if needed further, apart from the chapter where I needed to (resolved it using a limited external service that may lack other capabilities)? Can I “enable” it by SSH-ing through free machines out in the wild, like the ones provided by sdf.org?

spoiler

I’m talking about IPv6 here. I know, not that new, but didn’t want to give hints.