en
conf t

line vty 0 4
 no transport input
 transport input ssh
exit

hostname R1
ip domain name ng.net

crypto key generate rsa modulus 1024


!!! Now from Win 7 PC

1) Open putty app -> 
        Host            : 192.168.1.1
        Connection Type : ssh

!! now ssh from internet user pc -> ssh admin1@200.1.1.2