mountd: refused mount nfs illegal port

In case you’re getting error while mounting a nfs share, and logs on server showing:

Mar 24 10:44:57 localhost mountd[8344]: refused mount request from 192.168.1.2 for /dump (/dump): illegal port 52213

Add insecure option in your exports file:

/dump  *(ro,sync,no_root_squash,insecure)

And do exportfs -r or reload/restart nfs service.