NFS Portmap: RPC: Program not registered

[rdikarlus]

Hi all,

I am running some OpenBSD 7.1 servers. In the office we have also an ubuntu server, recently upgraded to 20.04 release. Since the ubuntu server was upgraded, I am unable to mount ubuntu NFS shares in the OpenBSD clients... the error massage is always the same: NFS Portmap: RPC: Program not registered .

In this OpenBSD servers I can mount other NFS shares from a NAS server with no problem... I think this problem comes from the UBUNTU server, but I am not sure, any idea? any help welcome, thanks.

[jggimi]

OpenBSD uses NFS version 3 by default, and has support for NFS version 2. Your file server might be provisioned to communicate with NFS version 4 only, which could account for the client-side error, as OpenBSD does not support NFS version 4. https://en.wikipedia.org/wiki/Networ...and_variations


A review of the Ubuntu server's provisioning and NFS logs may shed light on the problem.

[rdikarlus]

Thanks... I found out a simple solution and it seems to be working now... just by adding TCP in options in the file /etc/fstabs

[jggimi]

Then in the server's upgrade, it seems to me that access to NFS via UDP has been eliminated, either via NFS or via network provisioning.