Yes, I can ping,telnet and connect to the Asus Webinterface.
also can set IP Address and Gateway...
my Asus is as a client in the network.

the point is when i add this line:
echo "nameserver IP.OF.DNS.SERVER" > /etc/resolv.conf
save and reboot

then use putty program SSH connect to Asus

PuTTY Fatal Error
network error:connection refused