Warning preoccupanti?

[elio marvin <emarvin3678@gmail.com>]

Ciao lista

Già da qualche settimana continuo a vedere dei messaggi che incominciano a 
innervosirmi :) anche se non noto malfunzionamenti.
Nei file di log  non c'è traccia di questi messaggi.

------------------------------------------
...........
[....] Starting OpenBSD Secure Shell server: sshd@@@@@@@@@@@@@@@
@        WARNING: UNPROTECTED PRIVATE KEY FILE           @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permission 0622 for '/etc/ssh/ssh_host_rsa_key' are too open.
It is required that your private key files are NOT accessible by others.
This private key will be ignored.
bad permissions: ignore key: /etc/ssh/ssh_host_rsa_key
Could not load host key: /etc/ssh/ssh_host_rsa_key
@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@        WARNING: UNPROTECTED PRIVATE KEY FILE           @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permission 0622 for '/etc/ssh/ssh_host_dsa_key' are too open.
It is required that your private key files are NOT accessible by others.
This private key will be ignored.
bad permissions: ignore key: /etc/ssh/ssh_host_dsa_key
Could not load host key: /etc/ssh/ssh_host_dsa_key
@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@        WARNING: UNPROTECTED PRIVATE KEY FILE           @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permission 0622 for '/etc/ssh/ssh_host_ecdsa_key' are too open.
It is required that your private key files are NOT accessible by others.
This private key will be ignored.
bad permissions: ignore key: /etc/ssh/ssh_host_ecdsa_key
Could not load host key: /etc/ssh/ssh_host_ecdsa_key
.........
-------------------------------------

C'è qualche modo indolore per neutralizzarli? . . . ammesso che sia possibile, 
naturalmente.

Grazie infinite.
-- 
elio