[root@screwtswden ~]# mount -t nfs -v 172.16.128.215:/nas/2501 /mnt/nasexport/
mount.nfs: timeout set for Fri Oct 16 15:15:12 2020
mount.nfs: trying text-based options 'vers=4.2,addr=172.16.128.215,clientaddr=37.205.9.214'
mount.nfs: mount(2): Invalid argument
mount.nfs: trying text-based options 'vers=4,minorversion=1,addr=172.16.128.215,clientaddr=37.205.9.214'
mount.nfs: mount(2): Invalid argument
mount.nfs: trying text-based options 'vers=4,addr=172.16.128.215,clientaddr=37.205.9.214'
mount.nfs: mount(2): Protocol not supported
mount.nfs: trying text-based options 'addr=172.16.128.215'
mount.nfs: prog 100003, trying vers=3, prot=6
mount.nfs: trying 172.16.128.215 prog 100003 vers 3 prot TCP port 2049
mount.nfs: prog 100005, trying vers=3, prot=17
mount.nfs: trying 172.16.128.215 prog 100005 vers 3 prot UDP port 57971
mount.nfs: mount(2): Permission denied
mount.nfs: Protocol not supported
[root@screwtswden ~]# mount -t nfs4 -v 172.16.128.215:/nas/2501 /mnt/nasexport/
mount.nfs4: timeout set for Fri Oct 16 15:15:28 2020
mount.nfs4: trying text-based options 'vers=4.2,addr=172.16.128.215,clientaddr=37.205.9.214'
mount.nfs4: mount(2): Invalid argument
mount.nfs4: trying text-based options 'vers=4,minorversion=1,addr=172.16.128.215,clientaddr=37.205.9.214'
mount.nfs4: mount(2): Invalid argument
mount.nfs4: trying text-based options 'vers=4,addr=172.16.128.215,clientaddr=37.205.9.214'
mount.nfs4: mount(2): Protocol not supported
mount.nfs4: Protocol not supported

[root@screwtswden ~]# systemctl status var-lib-nfs-rpc_pipefs.mount
● var-lib-nfs-rpc_pipefs.mount - RPC Pipe File System
   Loaded: loaded (/usr/lib/systemd/system/var-lib-nfs-rpc_pipefs.mount; static; vendor preset: disabled)
   Active: failed (Result: exit-code) since Fri 2020-10-16 15:11:05 CEST; 1min 1s ago
    Where: /var/lib/nfs/rpc_pipefs
     What: sunrpc

Oct 16 15:11:05 screwtswden systemd[1]: Mounting RPC Pipe File System...
Oct 16 15:11:05 screwtswden mount[94]: mount: /var/lib/nfs/rpc_pipefs: permission denied.
Oct 16 15:11:05 screwtswden systemd[1]: var-lib-nfs-rpc_pipefs.mount: Mount process exited, code=exited status=32
Oct 16 15:11:05 screwtswden systemd[1]: var-lib-nfs-rpc_pipefs.mount: Failed with result 'exit-code'.
Oct 16 15:11:05 screwtswden systemd[1]: Failed to mount RPC Pipe File System.