showmount get cidr netmask

kdelover · 10-10-2013, 02:15 AM

Hello folks,

On my NFS server if i have a share meant for say 192.168.1.0/23,can i have showmount show me that /23 when i run 'showmount -e <nfshost>. Does any know how to get this info regarding the subnet mask ?

# showmount -e nfshost

/share/NFS 192.168.1.0

How do you determine if 192.168.1.0 is /23 or /24 ?

CodeFreaker · 10-10-2013, 03:20 AM

Quote:

Originally Posted by kdelover

Hello folks,

On my NFS server if i have a share meant for say 192.168.1.0/23,can i have showmount show me that /23 when i run 'showmount -e <nfshost>. Does any know how to get this info regarding the subnet mask ?

# showmount -e nfshost

/share/NFS 192.168.1.0

How do you determine if 192.168.1.0 is /23 or /24 ?

It depends on your network prefix.Most of the time for internal networks we depend on 24 sub-net mask,
Further in your configuration it should be

/share/NFS 192.168.1.0/24(rw,rsync,no_root_squash)

you can omit no_root_squash is you are not going to log with root from client.

kdelover · 10-10-2013, 03:29 AM

I think you didnt get my question. What i am looking at is,to have showmount show me the CIDR/netmask along side the allowed hosts.On my file server if export to '192.168.1.0/23' showmount would show me just '192.168.1.0',it doesn't tell if its /23 or /24.

kdelover · 10-10-2013, 05:31 AM

I looked at the wireshark packet captures between mount/showmount and the NFS server,i figured out how this works.