Please type:
echo "+" > /.rhosts
or
echo "%host name of the machine you want to connect%" > /.rhosts
or please implement ssh solution:
Machine 1:
ssh-keygen 杢 rsa
(accept default folder and leave empty password)
scp id_rsa.pub root@%ip_Machine2%:/root/.ssh/authorized_keys
Machine 2:
ssh-keygen 杢 rsa
(accept default folder and leave empty password)
scp id_rsa.pub root@%ip_Machine1%:/root/.ssh/authorized_keys
Regards,
Daniel