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Old 03-12-2011, 09:37 PM
Michael Thompson
 
Default SSH Issue

I've got a slight issue with logging into my server using public keys.

It was working fine, until I had to rebuild my desktop machine. I had
the key copied to the server, and passwordless logins where fine.

However now I have rebuilt my desktop, I cant get to the login.

So heres whats happend.

Rebuilt id_rsa.pub, server will not allow login. Remove id_rsa.pub and
the server allows password based login.

On the server, removed authorized_keys and known_hosts. makes no
difference. Server still disallows keyfile, but will allow password
when id_rsa is not present on the client.

Heres a -v of the login chat with keyfile

Code:

michael@eve:~$ ssh -v server
OpenSSH_5.5p1 Debian-6, OpenSSL 0.9.8o 01 Jun 2010
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to server [ser.ver.ip] port 22.
debug1: Connection established.
debug1: identity file /home/michael/.ssh/id_rsa type 1
debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048
debug1: Checking blacklist file /etc/ssh/blacklist.RSA-2048
debug1: identity file /home/michael/.ssh/id_rsa-cert type -1
debug1: identity file /home/michael/.ssh/id_dsa type -1
debug1: identity file /home/michael/.ssh/id_dsa-cert type -1
debug1: Remote protocol version 2.0, remote software version
OpenSSH_5.1p1 Debian-5
debug1: match: OpenSSH_5.1p1 Debian-5 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.5p1 Debian-6
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr 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 'host' is known and matches the RSA host key.
debug1: Found key in /home/michael/.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: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Offering public key: /home/michael/.ssh/id_rsa
Received disconnect from ser.ver.ip: 2: Too many authentication
failures for michael

And without

Code:

michael@eve:~/.ssh$ ssh -v server
OpenSSH_5.5p1 Debian-6, OpenSSL 0.9.8o 01 Jun 2010
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to server [ser.ver.ip] port 22.
debug1: Connection established.
debug1: identity file /home/michael/.ssh/id_rsa type -1
debug1: identity file /home/michael/.ssh/id_rsa-cert type -1
debug1: identity file /home/michael/.ssh/id_dsa type -1
debug1: identity file /home/michael/.ssh/id_dsa-cert type -1
debug1: Remote protocol version 2.0, remote software version
OpenSSH_5.1p1 Debian-5
debug1: match: OpenSSH_5.1p1 Debian-5 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.5p1 Debian-6
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr 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 'server' is known and matches the RSA host key.
debug1: Found key in /home/michael/.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: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Trying private key: /home/michael/.ssh/id_rsa
debug1: Trying private key: /home/michael/.ssh/id_dsa
debug1: Next authentication method: password
michael@server's password:
debug1: Authentication succeeded (password).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: Sending environment.
debug1: Sending env LANG = en_GB.UTF-8
Linux s15433632 2.6.18-028stab070.4 #1 SMP Tue Aug 17 18:32:47 MSD 2010 x86_64

So, is there anyway of getting the server to forget the previous keys,
it is remembering, As previousily said, I have completly removed the
contents of ~/.ssh/ on both the clients and the server.
__________________

--
Michael
http://photography.thompsonm.me.uk

To see a World in a Grain of Sand
And a Heaven in a Wild Flower,
Hold Infinity in the palm of your hand
And Eternity in an hour.
--William Blake


--
To UNSUBSCRIBE, email to debian-user-REQUEST@lists.debian.org
with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.org
Archive: AANLkTi=EW4oiZdGZkM9Gs9-T6MG8582ecDHq7QNCEjE+@mail.gmail.com">http://lists.debian.org/AANLkTi=EW4oiZdGZkM9Gs9-T6MG8582ecDHq7QNCEjE+@mail.gmail.com
 
Old 03-12-2011, 09:41 PM
Michael Thompson
 
Default SSH Issue

I've got a slight issue with logging into my server using public keys.

It was working fine, until I had to rebuild my desktop machine. I had
the key copied to the server, and passwordless logins where fine.

However now I have rebuilt my desktop, I cant get to the login.

So heres whats happend.

Rebuilt id_rsa.pub, server will not allow login. Remove id_rsa.pub and
the server allows password based login.

On the server, removed authorized_keys and known_hosts. makes no
difference. Server still disallows keyfile, but will allow password
when id_rsa is not present on the client.

Heres a -v of the login chat with keyfile

Code:

michael@eve:~$ ssh -v server
OpenSSH_5.5p1 Debian-6, OpenSSL 0.9.8o 01 Jun 2010
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to server [ser.ver.ip] port 22.
debug1: Connection established.
debug1: identity file /home/michael/.ssh/id_rsa type 1
debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048
debug1: Checking blacklist file /etc/ssh/blacklist.RSA-2048
debug1: identity file /home/michael/.ssh/id_rsa-cert type -1
debug1: identity file /home/michael/.ssh/id_dsa type -1
debug1: identity file /home/michael/.ssh/id_dsa-cert type -1
debug1: Remote protocol version 2.0, remote software version
OpenSSH_5.1p1 Debian-5
debug1: match: OpenSSH_5.1p1 Debian-5 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.5p1 Debian-6
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr 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 'host' is known and matches the RSA host key.
debug1: Found key in /home/michael/.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: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Offering public key: /home/michael/.ssh/id_rsa
Received disconnect from ser.ver.ip: 2: Too many authentication
failures for michael

And without

Code:

michael@eve:~/.ssh$ ssh -v server
OpenSSH_5.5p1 Debian-6, OpenSSL 0.9.8o 01 Jun 2010
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to server [ser.ver.ip] port 22.
debug1: Connection established.
debug1: identity file /home/michael/.ssh/id_rsa type -1
debug1: identity file /home/michael/.ssh/id_rsa-cert type -1
debug1: identity file /home/michael/.ssh/id_dsa type -1
debug1: identity file /home/michael/.ssh/id_dsa-cert type -1
debug1: Remote protocol version 2.0, remote software version
OpenSSH_5.1p1 Debian-5
debug1: match: OpenSSH_5.1p1 Debian-5 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.5p1 Debian-6
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr 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 'server' is known and matches the RSA host key.
debug1: Found key in /home/michael/.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: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Trying private key: /home/michael/.ssh/id_rsa
debug1: Trying private key: /home/michael/.ssh/id_dsa
debug1: Next authentication method: password
michael@server's password:
debug1: Authentication succeeded (password).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: Sending environment.
debug1: Sending env LANG = en_GB.UTF-8
Linux s15433632 2.6.18-028stab070.4 #1 SMP Tue Aug 17 18:32:47 MSD 2010 x86_64

So, is there anyway of getting the server to forget the previous keys,
it is remembering, As previousily said, I have completly removed the
contents of ~/.ssh/ on both the clients and the server.
__________________

--
Michael
http://photography.thompsonm.me.uk

To see a World in a Grain of Sand
And a Heaven in a Wild Flower,
Hold Infinity in the palm of your hand
And Eternity in an hour.
--William Blake


--
To UNSUBSCRIBE, email to debian-user-REQUEST@lists.debian.org
with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.org
Archive: AANLkTinTqmrNeK0SV_VatxC-cLp3yU_XhevomP0QfxCd@mail.gmail.com">http://lists.debian.org/AANLkTinTqmrNeK0SV_VatxC-cLp3yU_XhevomP0QfxCd@mail.gmail.com
 

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