ProxyJump doesn't work when jump server has underscore in name about blink HOT 3 OPEN

I need to check this but we can get it fixed before final release for 17.3.0

from blink.

So here is the thing. Although underscores are allowed in domain names, they are still not allowed in Host Names. Host names are limited to letters-digits-hyphens. Libssh follows this convention, I'm not sure if OpenSSH does though. When we are the ones replacing it (on the ProxyCommand example you sent), this is not an issue as we consider that an "Alias" and not a Hostname.

That being said, one thing is what the rules say and another what people are actually doing. We may need to take this to upstream. For the time being, if you want to have underscores, just don't use them at the ProxyJump itself.

I'm gonna leave this for a later release because I don't know if the "underscore" may actually break other things within LibSSH for 17.3.0 and we are about to release. If the issues had been parsing on our side, I would have had no problem making the change. Hope that makes sense.

Resources
https://git.libssh.org/projects/libssh.git/tree/src/misc.c#n2133
https://stackoverflow.com/questions/2180465/can-domain-name-subdomains-have-an-underscore-in-it/2183140#2183140

from blink.

I see, that makes sense. Thanks for checking that out; it doesn't really affect the usefulness of the app anyway 😆 as for OpenSSH, the reason I opened the issue was because the same config (with underscores for the ProxyJump) worked fine on my Mac with OpenSSH, but I didn't realize that might have been an OpenSSH-specific thing

from blink.