I have SSH set up (macOS 10.13) among others, with GitLab too, and when connecting to a different (NOT GitLab) server, I get the following error:
/Users/username/.ssh/config line 25: Unsupported option “rsaauthentication”
And this is what I have on line 25 (and a couple of lines around it) in my config file - it’s basically the GitLab ssh default config, according to the relevant doc:
23 Host gitlab.com
24 User git
25 RSAAuthentication yes
26 IdentityFile ~/.ssh/id_rsa_gitlab
I haven’t seen this error before, it started to show up only recently, although I cannot connect it with a recent event, maybe the upgrade to macOS 10.13, but I do not remember exactly, unfortunately.
The SSH connection I’m (successfully) making is to an Ubuntu server using a different SSH config and key.
I’m not sure, is this an issue on the Ubuntu server side or is it something on the GitLab side of things? I’m assuming Ubuntu, considering it’s not supposed to take that line into account at all (I’m also assuming that the server must run through the entire config file either way), at the same time my GitLab config is the only one using the RSAAuthentication option.
Note: the connection does go ahead successfully, so no issues there; I’m really just curious about this error (or warning).