Netopeer2-cli connect timeout

About the netconf,my netopeer2-server is up,but when I want to neto2peer-cli to connect,it cannot:
root@OpenWrt:/etc/ssh# netopeer2-cli

connect localhost
Interactive SSH Authentication
Type your password:
root@localhost password:
nc ERROR: Server's timeout elapsed.
cmd_connect: Connecting to the localhost:830 as user "root" failed.
it hava created a known_hosts:
[localhost]:830 ssh-rsa AAAAB3Nza.......