ssh without password?

[Timothy Murphy]

When I ssh into machine B from machine A, I am asked for my password.
But when I ssh into A from B, I am not.

In both cases, id_rsa.pub from the other machine
has been added to authorized_keys .
And I see no difference in sshd_config or ssh_config .

So why am I asked for my password when ssh-ing into B?


-- 
Timothy Murphy  
e-mail (<80k only): tim /at/ birdsnest.maths.tcd.ie
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland