Debian 12 kernel NFS server doesn't listen on port 2049 UDP

[Matthias Scheler]

Hello,

after upgrading one of my systems from Debian 11 to 12 the kernel NFS server
doesn't seem to accept NFS requests over UDP on port 2049 anymore:

>rpcinfo -p | grep nfs
100003 3 tcp 2049 nfs
100003 4 tcp 2049 nfs
100227 3 tcp 2049 nfs_acl

This causes problems for a non-Linux NFS client whose automounter
tries to perform the mount over UDP. Is there a way to re-enable
the UDP port?

Kind regards

--
Matthias Scheler http://zhadum.org.uk/

[piorunz]

Edit /etc/nfs.conf file:
[nfsd]
udp=y

then:
sudo systemctl restart nfs-server

Result:
$ rpcinfo -p | grep nfs

100003 3 tcp 2049 nfs
100003 4 tcp 2049 nfs
100227 3 tcp 2049 nfs_acl

100003 3 udp 2049 nfs
100227 3 udp 2049 nfs_acl

--
With kindest regards, Piotr.

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[Matthias Scheler]

On Sat, Jul 29, 2023 at 05:44:59PM +0100, piorunz wrote:
> Edit /etc/nfs.conf file:
> [nfsd]
> udp=y
>
> then:
> sudo systemctl restart nfs-server

Yes, that fixed my NFS problem.

Thank you very much