Re: passwordless ssh root logins stopped working after testing dist-upgrade
On 4/6/2010 4:37 PM, Russell L. Carter wrote:
> First, I'm new to this list and how do you all want me to handle
> replies? Rather than the two individuals that show up with
> reply-all, I've just replied directly to the list. If that's not
> what you want, please let me know.
>
> Ryan Manikowski wrote:
>> Run this command as the user you would like to login with via ssh and
>> send back the results:
>>
>> ssh -vvvv <hostname>
>
> Thanks Ryan... In this session I've ssh-added my regular key (rsa),
> and then
> ssh-copy-id'ed it as follows. I've tried both rsa and dsa keys,
> appended is
> the debug output with an rsa key. I also just verified that I can ssh
> without
> a password into a new ordinary user account (after ssh-copy-id).
>
> rcarter@feyerabend> ssh-copy-id root@localhost
> root@localhost's password:
> Now try logging into the machine, with "ssh 'root@localhost'", and
> check in:
>
> .ssh/authorized_keys
>
> to make sure we haven't added extra keys that you weren't expecting.
>
> rcarter@feyerabend> ssh root@localhost
> root@localhost's password:
>
> rcarter@feyerabend> ssh -vvvv root@localhost
> OpenSSH_5.3p1 Debian-3, OpenSSL 0.9.8n 24 Mar 2010
> debug1: Reading configuration data /home/rcarter/.ssh/config
> debug1: Reading configuration data /etc/ssh/ssh_config
> debug1: Applying options for *
> debug2: ssh_connect: needpriv 0
> debug1: Connecting to localhost [::1] port 22.
> debug1: Connection established.
> debug1: identity file /home/rcarter/.ssh/identity type -1
> debug3: Not a RSA1 key file /home/rcarter/.ssh/id_rsa.
> debug2: key_type_from_name: unknown key type '-----BEGIN'
> debug3: key_read: missing keytype
> debug2: key_type_from_name: unknown key type 'Proc-Type:'
> debug3: key_read: missing keytype
> debug2: key_type_from_name: unknown key type 'DEK-Info:'
> debug3: key_read: missing keytype
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug3: key_read: missing whitespace
> debug2: key_type_from_name: unknown key type '-----END'
> debug3: key_read: missing keytype
> debug1: identity file /home/rcarter/.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/rcarter/.ssh/id_dsa type -1
> debug1: Remote protocol version 2.0, remote software version
> OpenSSH_5.3p1 Debian-3
> debug1: match: OpenSSH_5.3p1 Debian-3 pat OpenSSH*
> debug1: Enabling compatibility mode for protocol 2.0
> debug1: Local version string SSH-2.0-OpenSSH_5.3p1 Debian-3
> debug2: fd 3 setting O_NONBLOCK
> debug1: SSH2_MSG_KEXINIT sent
> debug3: Wrote 792 bytes for a total of 824
> debug1: SSH2_MSG_KEXINIT received
> debug2: kex_parse_kexinit:
> diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
>
> debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
> debug2: kex_parse_kexinit:
> aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
>
> debug2: kex_parse_kexinit:
> aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
>
> debug2: kex_parse_kexinit:
> hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
>
> debug2: kex_parse_kexinit:
> hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
>
> debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
> debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
> debug2: kex_parse_kexinit:
> debug2: kex_parse_kexinit:
> debug2: kex_parse_kexinit: first_kex_follows 0
> debug2: kex_parse_kexinit: reserved 0
> debug2: kex_parse_kexinit:
> diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
>
> debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
> debug2: kex_parse_kexinit:
> aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
>
> debug2: kex_parse_kexinit:
> aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
>
> debug2: kex_parse_kexinit:
> hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
>
> debug2: kex_parse_kexinit:
> hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
>
> debug2: kex_parse_kexinit: none,zlib@openssh.com
> debug2: kex_parse_kexinit: none,zlib@openssh.com
> debug2: kex_parse_kexinit:
> debug2: kex_parse_kexinit:
> debug2: kex_parse_kexinit: first_kex_follows 0
> debug2: kex_parse_kexinit: reserved 0
> debug2: mac_setup: found hmac-md5
> debug1: kex: server->client aes128-ctr hmac-md5 none
> debug2: mac_setup: found hmac-md5
> 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
> debug3: Wrote 24 bytes for a total of 848
> debug2: dh_gen_key: priv key bits set: 138/256
> debug2: bits set: 498/1024
> debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
> debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
> debug3: Wrote 144 bytes for a total of 992
> debug3: check_host_in_hostfile: filename /home/rcarter/.ssh/known_hosts
> debug3: check_host_in_hostfile: match line 1
> debug1: Host 'localhost' is known and matches the RSA host key.
> debug1: Found key in /home/rcarter/.ssh/known_hosts:1
> debug2: bits set: 533/1024
> debug1: ssh_rsa_verify: signature correct
> debug2: kex_derive_keys
> debug2: set_newkeys: mode 1
> debug1: SSH2_MSG_NEWKEYS sent
> debug1: expecting SSH2_MSG_NEWKEYS
> debug3: Wrote 16 bytes for a total of 1008
> debug2: set_newkeys: mode 0
> debug1: SSH2_MSG_NEWKEYS received
> debug1: SSH2_MSG_SERVICE_REQUEST sent
> debug3: Wrote 48 bytes for a total of 1056
> debug2: service_accept: ssh-userauth
> debug1: SSH2_MSG_SERVICE_ACCEPT received
> debug2: key: /home/rcarter/.ssh/id_rsa (0x7f58126f2ba0)
> debug2: key: /home/rcarter/.ssh/identity ((nil))
> debug2: key: /home/rcarter/.ssh/id_dsa ((nil))
> debug3: Wrote 64 bytes for a total of 1120
> debug1: Authentications that can continue: publickey,password
> debug3: start over, passed a different list publickey,password
> debug3: preferred
> gssapi-keyex,gssapi-with-mic,gssapi,publickey,keyboard-interactive,password
>
> debug3: authmethod_lookup publickey
> debug3: remaining preferred: keyboard-interactive,password
> debug3: authmethod_is_enabled publickey
> debug1: Next authentication method: publickey
> debug1: Offering public key: /home/rcarter/.ssh/id_rsa
> debug3: send_pubkey_test
> debug2: we sent a publickey packet, wait for reply
> debug3: Wrote 368 bytes for a total of 1488
> debug1: Authentications that can continue: publickey,password
> debug1: Trying private key: /home/rcarter/.ssh/identity
> debug3: no such identity: /home/rcarter/.ssh/identity
> debug1: Trying private key: /home/rcarter/.ssh/id_dsa
> debug3: no such identity: /home/rcarter/.ssh/id_dsa
> debug2: we did not send a packet, disable method
> debug3: authmethod_lookup password
> debug3: remaining preferred: ,password
> debug3: authmethod_is_enabled password
> debug1: Next authentication method: password
> root@localhost's password:
>
What you're trying to do here is login to the 'root' account using your
non-root account to initiate the ssh connection. It is reading the
'id_rsa.pub' pubkey file from /home/<user>/.ssh/ and this is why it is
failing. The non-root account on the remote side (in this case, your
localhost) does not have access to ANY files in /root/ so it will never
work.
Ryan Manikowski
]] Devision Media Services LLC [[
www.devision.us
ryan@devision.us | 716.771.2282
>
>
>>
>> Ryan Manikowski
>>
>>
>> ]] Devision Media Services LLC [[
>> www.devision.us
>> ryan@devision.us | 716.771.2282
>>
>>
>> On 4/6/2010 4:06 PM, d.sastre.medina@gmail.com wrote:
>>> On Tue, Apr 06, 2010 at 03:24:04PM -0400, Tony Nelson wrote:
>>>
>>>> On 10-04-06 14:12:19, Russell L. Carter wrote:
>>>>
>>>>> root@feyerabend> diff -u ssh_config ssh_config.dpkg-dist
>>>>> --- ssh_config 2010-04-05 21:14:26.172871668 -0700
>>>>> +++ ssh_config.dpkg-dist 2010-01-04 09:05:12.000000000 -0700
>>>>> @@ -17,8 +17,8 @@
>>>>> # ssh_config(5) man page.
>>>>>
>>>>> Host *
>>>>> -ForwardAgent yes
>>>>> -ForwardX11 yes
>>>>> +# ForwardAgent no
>>>>> +# ForwardX11 no
>>>>> # ForwardX11Trusted yes
>>>>> # RhostsRSAAuthentication no
>>>>> # RSAAuthentication yes
>>>>>
>>>> I don't see any "PermitRootLogin without-password" line in your diff.
>>>>
>>> Hello,
>>>
>>> That would disable password login for root, but does not enable per-se
>>> pubkey auth (AFAIK).
>>>
>>> man sshd_config explain this: PermitRootLogin, PubkeyAuthentication
>>> and AuthorizedKeysFile entries.
>>>
>>> Regards.
>>>
>>>
>>
>>
>
>
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