Does the Red Hat kernel support POSIX compliant ACL on NFS v3 (I'm looking at a rhel 6.10 install for the moment)? And if so how does one enable it?
Currently all of my NFS mounts are using NFS version 3.

I have noticed that using the following doesn't work:

mount -o acl,vers=3 /nfsdir /localdir

cd /localdir

getfacl abc

file: abc

owner: root

group: root

user::rw-
group::r--
other::r--

setfacl -m u:git:rx abc

setfacl: abc: Operation not supported

mount

/nfsdir on /localdir type nfs (rw,relatime,vers=3,rsize=65536,wsize=65536,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=10.1.234.236,mountvers=3,mountport=635,mountproto=udp,local_lock=none,addr=10.1.234.236)