What protocol does NFS support?
All versions of NFS can use Transmission Control Protocol (TCP) running over an IP network, with NFSv4 requiring it. NFSv2 and NFSv3 can use the User Datagram Protocol (UDP) running over an IP network to provide a stateless network connection between the client and server.
What are the mount options for NFS?
Common NFS mount options in Linux
- rw (read/write) / ro (read-only) – Use rw for data that users need to modify.
- suid / nosuid.
- hard / soft.
- intr / nointr.
- fg (foreground) / bg (background)
- devs / nodevs.
- timeo=n.
- retrans=n.
Does NFS support NAT?
The NFS server is accessible in the intranet. A NAT runs on a workstation with FreeBSD or Linux, which is a node in the intranet. Multiple NFS clients are in a private LAN behind the NAT. Routed or Bridged network is not preferred in order to keep the clients invisible outside the NAT.
What ports do I need to open for NFS?
NFS uses port 2049. NFSv3 and NFSv2 use the portmapper service on TCP or UDP port 111. The portmapper service is consulted to get the port numbers for services used with NFSv3 or NFSv2 protocols such as mountd, statd, and nlm.
Why is mount.nfs not supported in Linux?
Instead of the FQDN, running host 1.2.3.4 returned pointers to both “myhost.” and “myhost.example.com.”. My NFS server seemed to look at the first PTR entry in the DNS response only which didn’t match the wildcard in /etc/exports and as a consequence it blocked NFSv4 from this host.
Why is my NFS server not supporting version 3?
Another approach may be to change the NFS server to support version 3 (or even 4). I’m getting this error on Fedora 31. It turns out the drive is already mounted… I ran into the “Protocol not supported” error as well. In my case the root cause turned out to be a subtle issue with a DNS reverse entry.
How to mount a NFS drive in Fedora 31?
Solution to mount the export is to use mount option vers=2 either on the commandline: Another approach may be to change the NFS server to support version 3 (or even 4). I’m getting this error on Fedora 31. It turns out the drive is already mounted… I ran into the “Protocol not supported” error as well.
How to mount a NFS Share on a NAS?
I want to mount the NFS share of a Zyxel NSA310s NAS. Showmount, called on the client machine, shows the share: