How to connect NFS with a specfic user under CentOS/RedHat 6
1. On server side must have the insecure option enabled edit /etc/exports
2. Make the change
3. Make sure it is running
rpcinfo -p | grep portmap
The RedHat linux client that will connect to a NFS server.
Needs to have portmap and if you dont want dynamic ports, enter static ports into /etc/sysconfig/nfs, for example:
mountd: refused mount request: unmatched host
Most likely the problem is on /etc/exports, add your IP or range after the directory you want to share.