How are you attempting to use it? I am assuming you mounted the NFS
I've tried both NFS and SMB shares for msgs and files - Nada for both.
I'm running Ubuntu linux with QNAP NAS advertising both shares.
The reason I am asking how you're mounting the NFS is because direct IO to a NFS mounted directory should work -- Thats exactly what NFS is designed to do, otherwise every program out there would need to be rewritten specifically to support NFS.
If you're trying to use a notation like nfs://server/path/ in Mystic it will not work. But if you're mounting it to say "/mysharedfiles/" and you configure a file base to look for files there, it should work.
Mystic won't mount your NFS and access to NFS is per-user, so your BBS user would both need access and must be provided with a fully mounted local directory at startup.
I don't have an NFS to test with, so I want to cover the basics first just to make sure we're on the same page before I try to figure out what the next
steps are.
EDIT: I just did a quick Google and what I am saying here is reinforced by a RedHat bugfix where direct I/O wasn't working properly with NFS:
https://bugzilla.redhat.com/show_bug.cgi?id=647297
--- Mystic BBS v1.12 A39 2018/01/08 (Windows/32)
* Origin: Sector 7 [Mystic BBS WHQ] (21:1/108)