Help! Public Key Authentication

From: Chip Ling (chip_ling_vb_at_yahoo.com)
Date: 10/12/04

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    Date: Tue, 12 Oct 2004 15:05:19 -0400

    Dear all,

    I cannot log to a Linux Red Hat server under SFTP or Open SSH using
    public key authentication.

    Local server: Sun Solaris running Open SSH 3.8.1
    Target server: Linux box running Open SSH 3.1

    Here is the step I've done so far

    1. Log on to my local Sun box, run ssh-keygen -t rsa, then put in all
    passphase and create the public key and private key in the ~/.ssh
    directory.

    2. Log on to the Linux box and append the Sun box public key information
    to ~/.ssh/authorized_keys file. Save the file and chmod to 600.

    3. Log on to my local Sun box. Then try to use ssh or sftp logon to the
    Linux box. Both ssh and sftp fail to connect using the public key
    authentication and fallback to prompt for the password. Below please
    find the debug log of SFTP.

    $sftp -v testusr@test.server.ca
    Connecting to test.server.ca...
    OpenSSH_3.8.1p1, OpenSSL 0.9.7d 17 Mar 2004
    debug1: Reading configuration data /usr/local/etc/ssh_config
    debug1: Connecting to test.server.ca [207.48.72.213] port 22.
    debug1: Connection established.
    debug1: identity file /export/home/localusr/.ssh/id_rsa type 1
    debug1: identity file /export/home/localusr/.ssh/id_dsa type 2
    debug1: Remote protocol version 1.99, remote software version
    OpenSSH_3.1p1
    debug1: match: OpenSSH_3.1p1 pat OpenSSH_2.*,OpenSSH_3.0*,OpenSSH_3.1*
    debug1: Enabling compatibility mode for protocol 2.0
    debug1: Local version string SSH-2.0-OpenSSH_3.8.1p1
    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 'test.server.ca' is known and matches the RSA host key.
    debug1: Found key in /export/home/localusr/.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: Offering public key: /export/home/localusr/.ssh/id_rsa
    debug1: Authentications that can continue:
    publickey,password,keyboard-interactive
    debug1: Offering public key: /export/home/localusr/.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
    testusr@test.server.ca's password:

    Anyone can help?

    Rgds,
    Chip Ling

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