Can't login through ssh from 6.3 machine to 7.0 machine

[Kris Kennaway]

Frank Bonnet wrote:
> Hello
> 
> I have installed a fresh new machine running 7.0 and surprisingly
> I cannot log in from another machine through SSH ...
> 
> I haven't modified the standard sshd configuration at install
> which is the same than my other 6.3 based machine ...
> 
> All accounts are local.
> 
> I can    ssh 7.0 --> 6.3
> I cannot ssh 6.3 --> 7.0
> 

Please provide more information, such as

1) is sshd in fact running on 7.0

2) What command you run

3) error messages

4) packet traces

Kris