How to fix "mountd: refused mount request: unmatched host"


On Client (

# mount /mnt
mount.nfs: access denied by server while mounting

On NFS Server (

# tail -n 1 /var/log/messages
Sep 13 00:00:32 cc01-nds-ins rpc.mountd[29613]: refused mount request from for /export/home/deepak (/export/home/deepak): unmatched host



This error is occurring because the NFS server is unaware of the client network attempting to access the NFS shares.
As for my case below are the list of directories which are shared using NFS server

# exportfs -v
/export/home/deepak     ,wdelay,root_squash,no_subtree_check)
/export/home/rahul      ,wdelay,no_root_squash,no_subtree_check)
/root/upgrade/scripts   ,wdelay,no_root_squash,no_subtree_check)

As you see the directories are shared for subnet while my client server IP is in a different subnet
So I need to add this subnet in my exports share

On NFS Server (

Add a new line in /etc/exports file as shown below

# vi /etc/exports

Refresh the share

# exportfs -ra

List the updated share information

# exportfs -v
/export/home/deepak    ,wdelay,root_squash,no_subtree_check)
/export/home/deepak    ,wdelay,root_squash,no_subtree_check)
/export/home/rahul     ,wdelay,no_root_squash,no_subtree_check)
/ISS/export-upgrade    ,wdelay,no_root_squash,no_subtree_check)

Let us re-attempt to access the NFS share from our client

On Client (

# mount -t nfs /mnt
# mount | grep export on /mnt type nfs (rw,addr=

I hope this tutorial was helpful.

2 thoughts on “How to fix "mountd: refused mount request: unmatched host"”

  1. I can see how you came up with but have no clue what my equivalent value of would be. Our old documentation at work used ’10.YYY.XX.0/19′ which no longer works, how does one figure out the needed values for a client to connect to a server!?!?!?!


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