NFS Error: failed_System Error_No route to host

Error:
[root@client.example.com ~]# mount -t nfs 1192.168.0.4:/u00-local /mnt
mount: mount to NFS server '1192.168.0.4' failed: System Error: No route to host.

[root@client.example.com ~]# showmount -e 1192.168.0.4
mount clntudp_create: RPC: Port mapper failure - RPC: Unable to receive


Solution:
stop iptables at both NFS and client machine.

[root@server.example.com init.d]# service iptables stop
iptables: Setting chains to policy ACCEPT: filter          [  OK  ]
iptables: Flushing firewall rules:                         [  OK  ]
iptables: Unloading modules:                               [  OK  ]
[root@server.example.com init.d]#