Public key authentication troubles

From: Nicolas Bertolotti (nbertolo_at_chez.com)
Date: 05/22/04 

Date: Sat, 22 May 2004 01:01:08 +0200

Hi,

I'm facing troubles while trying to activate connection without a password
on a specific linux box.

I've generated the keys using ssh-keygen -t rsa1
I've then copied the public key to authorized_keys : cp .ssh/identity.pub
.ssh/authorized_keys
I've also changed the permissions : chmod go-rwx .ssh

and when I run (as 'poly' user): ssh -v -1 `hostname`, I get :
OpenSSH_3.5p1, SSH protocols 1.5/2.0, OpenSSL 0x0090701f
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Rhosts Authentication disabled, originating port will not be
trusted.
debug1: ssh_connect: needpriv 0
debug1: Connecting to rhombus.polyspace.us [172.16.1.52] port 22.
debug1: Connection established.
debug1: identity file /home/poly/.ssh/identity type 0
debug1: Remote protocol version 1.99, remote software version OpenSSH_3.5p1
debug1: match: OpenSSH_3.5p1 pat OpenSSH*
debug1: Local version string SSH-1.5-OpenSSH_3.5p1
debug1: Waiting for server public key.
debug1: Received server public key (768 bits) and host key (1024 bits).
debug1: Host 'rhombus.polyspace.us' is known and matches the RSA1 host key.
debug1: Found key in /home/poly/.ssh/known_hosts:2
debug1: Encryption type: 3des
debug1: Sent encrypted session key.
debug1: cipher_init: set keylen (16 -> 32)
debug1: cipher_init: set keylen (16 -> 32)
debug1: Installing crc compensation attack detector.
debug1: Received encrypted confirmation.
debug1: Trying RSA authentication with key '/home/poly/.ssh/identity'
debug1: Server refused our key.
debug1: Doing challenge response authentication.
debug1: No challenge.
debug1: Doing password authentication.

I've done this in the past very often and it used to work fine. In order to
make sure there was no problem with the configuration, I've transfered a
number of files (network and ssh configuration and keys) to another computer
:
/etc/ssh/*
/etc/hosts
/etc/sysconfig/network
/etc/sysconfig/network-scripts/*
/etc/rc.d/init.d/sshd
/home/poly/.ssh/*
... and (after I reboot this new computer), when I run ssh -v -1 `hostname`,
everything works fine.

Can anyone help me ?

Best regards

Nicolas

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