Backups via SCP or RSYNC

[Roger Grosswiler]

Hi,

i try to get together my backups via rsync or scp. I have:

1 server holding the backups. Behind the firewall, has to pick the 
backups (HOLDER)

1 server creating the backups. (CREATOR)

I would like to do now the following:

HOLDER picks the backups via rsync or scp on CREATOR. This shall happen 
via scp or rsync. I tried both, the problem is, that for ssh-issues, i 
have to indicate a password, that ssh is asking for.

How can i:
- either indicate the password for ssh without interactivity?
- taking another way to do this? Thanks for links.

i've been trying this 
http://www.siliconvalleyccie.com/linux-hn/ssh-server.htm

but it somehow doesn't work

Roger