Created attachment 206024 [details]
Add link to bug that has an explanation.
I agree with documenting this, but I think it would make more sense to show this as a separate [EACCES] condition (like the two [EACCES] conditions in the UNIX domain part below).
Created attachment 206147 [details]
This is useful but I think it is still a bit too vague. The [EACCES] error occurs only when the connection is denied by a "sufficiently local" firewall (ipfw(4)/ipf(4)/pf(4) or custom pfil(9) user). A firewall behind a network can cause various other errors but not [EACCES]. I wonder what the best way to formulate this is.
Sorry for not mentioning this earlier.
(In reply to Jilles Tjoelker from comment #4)
> Local firewall rules don't allow connection to be made, for example ipfw(4)/ipf(4)/pf(4) or a custom pfil(9) user.