I think that's because what you're really looking for isn't a jump server but a zero-trust network like cloudflare access or beyondcorp. You want authorized nat

I think that's because what you're really looking for isn't a jump server but a zero-trust network like cloudflare access or beyondcorp. You want authorized native connections, not proxies in the typical sense (although they do end up being proxies but more like a L3 proxy not L7)