NFS server and client installation in ubuntu

Question

I have installed NFS server and Client on separate machines. The problem is when i mount the shared directory on client side using command

mount server_addr:server_dir client_dir

But it gives an error saying that

don't have permission to share this directory (can't access the server_dir)

Though I have given read-write (rw) permissions to the client by updating /etc/exports file in server as

server_dir client_ip(rw,sync,no_root_squash)

But still giving error as access denied on client side.

Any kind of help/suggestions are appreciated.

Answer 1

set iptables permissions (related to firewall)

iptables -P INPUT ACCEPT
iptables -P OUTPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -F**