I have been trying with no success to get Openssl to connect between servers without a password prompt.
All works OK for the 'root' user but when I try and set it up for another user it fails, I am carrying out the following steps to acheive this:
serverA% ssh-keygen -t dsa -f ~/.ssh/id_dsa
When you are asked for a passphrase, leave it empty. Now send the public key to serverB.
serverA% cd .ssh
serverA% scp id_dsa.pub user@serverB:~/.ssh
Next, log in to serverB and add the public key to the list of authorized keys.
serverA% ssh user@serverB
serverB% cd .ssh
serverB% cat id_dsa.pub >> authorized_keys2
serverB% chmod 640 authorized_keys2
serverB% rm -f id_dsa.pub


I get the following results:
ssh -v venus
OpenSSH_3.9p1, OpenSSL 0.9.7e 25 Oct 2004
debug1: Reading configuration data /usr/local/etc/ssh_config
debug1: Connecting to venus [172.16.2.16] port 22.
debug1: Connection established.
debug1: identity file /users1/www/.ssh/identity type -1
debug1: identity file /users1/www/.ssh/id_rsa type -1
debug1: identity file /users1/www/.ssh/id_dsa type 2
debug1: Remote protocol version 1.99, remote software version OpenSSH_3.9p1
debug1: match: OpenSSH_3.9p1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.9p1
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'venus' is known and matches the RSA host key.
debug1: Found key in /users1/www/.ssh/known_hosts:1
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Trying private key: /users1/www/.ssh/identity
debug1: Trying private key: /users1/www/.ssh/id_rsa
debug1: Offering public key: /users1/www/.ssh/id_dsa
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Next authentication method: keyboard-interactive
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Next authentication method: password
www@venus's password:

i doubt this makes a difference, but i do rsa instead of dsa... try it... ya never know.

All sorted, issue was down to incorrect permissions on the users home folder.