NetBSD 8.0-BETA NFS Server over OpenVPN: mount_nfs: can't access /: Permission denied

[Andreas Beck <lists%mode42.net@localhost>]

Hello,

i want to use nfsd via openvpn (openvpn runs on udp).
Both, Server and Client are NetBSD8-BETA

When I want to mount from the client, i get this error:
mount_nfs: can't access /: Permission denied

From client: rpcinfo -p <nfsdhost>
   program vers proto   port  service
    100000    4   tcp    111  portmapper
    100000    3   tcp    111  portmapper
    100000    2   tcp    111  portmapper
    100000    4   udp    111  portmapper
    100000    3   udp    111  portmapper
    100000    2   udp    111  portmapper
    100000    4 local    111  portmapper
    100000    3 local    111  portmapper
    100000    2 local    111  portmapper
    100005    1   udp   1022  mountd
    100005    3   udp   1022  mountd
    100005    1   tcp   1023  mountd
    100005    3   tcp   1023  mountd
    100003    2   udp   2049  nfs
    100003    3   udp   2049  nfs
    100003    2   tcp   2049  nfs
    100003    3   tcp   2049  nfs
    100024    1   udp   1021  status
    100024    1   tcp   1022  status
    100021    0   udp   1020  nlockmgr
    100021    1   udp   1020  nlockmgr
    100021    3   udp   1020  nlockmgr
    100021    4   udp   1020  nlockmgr
    100021    0   tcp   1021  nlockmgr
    100021    1   tcp   1021  nlockmgr
    100021    3   tcp   1021  nlockmgr
    100021    4   tcp   1021  nlockmgr

/etc/exports
/      -network 10.8.0.0 -mask 255.255.255.255 -maproot=root

Ive created for testing a hosts.allow with ALL: ALL.
There is no hosts.deny.

Best Regards,
Andreas