I am new user for Linux so,while configuring NFS in linux I face a Problem i.e,

error flash :-"mount to NFS server '192.168.12.43' failed: server is down." on client machine


I deed on server side

1. make an entry in /etc/exports
2. service nsf start
3. exportfs :- it display "/var/www/html" * <world>

On client side
1. service nfs start
2. mount -t nfs 192.168.14.10:/home /var/www/html

problem:- mount to NFS server '192.168.12.43' failed: server is down.

Why is the ip number in the failure line different from the number in mount?

I used this howto to set up my nfs shares. It may help you:
http://nfs.sourceforge.net/nfs-howto/

Here's another tip, if you don't know about it already. Place a line in the /etc/hosts file of your client machine, such as "192.168.14.10 servername", where servername is the name of the pc with that ip number. Then you can use the server name instead of the number whenever you try to contact it: "mount -t nfs servername:/home /var/www/html", for example. Might save you some hassle. I wouldn't use it in config files though.