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I copied my public ssh key to a remote server, but the authentication fails with the following ssh output:

ilya@workstation ~ % ssh -v ilya@remoteserver
OpenSSH_6.6.1, OpenSSL 1.0.1k-fips 8 Jan 2015
debug1: Reading configuration data /home/ilya/.ssh/config
debug1: /home/ilya/.ssh/config line 7: Applying options for remoteserver
debug1: /home/ilya/.ssh/config line 43: Applying options for *
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 20: Applying options for *
debug1: Hostname has changed; re-reading configuration
debug1: Reading configuration data /home/ilya/.ssh/config
debug1: /home/ilya/.ssh/config line 43: Applying options for *
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 20: Applying options for *
debug1: Connecting to remoteserver.tu-darmstadt.de [130.83.70.XXX] port 22.
debug1: Connection established.
debug1: identity file /home/ilya/.ssh/id_rsa type 1
debug1: identity file /home/ilya/.ssh/id_rsa-cert type -1
debug1: identity file /home/ilya/.ssh/id_dsa type -1
debug1: identity file /home/ilya/.ssh/id_dsa-cert type -1
debug1: identity file /home/ilya/.ssh/id_ecdsa type -1
debug1: identity file /home/ilya/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/ilya/.ssh/id_ed25519 type -1
debug1: identity file /home/ilya/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1
debug1: match: OpenSSH_6.6.1 pat OpenSSH_6.6.1* compat 0x04000000
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5-etm@openssh.com none
debug1: kex: client->server aes128-ctr hmac-md5-etm@openssh.com none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA 77:35:a6:ca:15:66:5d:05:33:ab:35:35:c6:65:ed:79 [MD5]
debug1: Host 'remoteserver.tu-darmstadt.de' is known and matches the ECDSA host key.
debug1: Found key in /home/ilya/.ssh/known_hosts:60
debug1: ssh_ecdsa_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,gssapi-keyex,gssapi-with-mic,password
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/ilya/.ssh/id_rsa
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
debug1: Trying private key: /home/ilya/.ssh/id_dsa
debug1: Trying private key: /home/ilya/.ssh/id_ecdsa
debug1: Trying private key: /home/ilya/.ssh/id_ed25519
debug1: Next authentication method: password

The permission seem to fit: the ~/.ssh folder on the local workstation was set to 700 and ~/.ssh/authorized_keys on the remote server was set to 600.

Do you have any idea, what the problem cold be?

@Jakuje

$ ls -lZd ~ilya ~ilya/.ssh/ ~ilya/.ssh/authorized_keys
drwxr-x--- ilya ilya ?                                /home/ilya
drwxrwxr-x ilya ilya ?                                /home/ilya/.ssh/
-rw------- ilya ilya ?                                /home/ilya/.ssh/authorized_keys

marked as duplicate by Gilles ssh Oct 13 '16 at 21:23

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

up vote 1 down vote accepted

The ~/.ssh folder can not be writable by anyone else than the owner. Remove the group permissions entirely (the below command on the server) and you should be good:

chmod g-rwx ~ylia/.ssh
  • Thanks a lot. In the guidance [wiki.archlinux.de/title/… – Ilya Oct 13 '16 at 11:37
  • the was only an instruction to chmod 600 ~/.ssh/authorized_keys, but not the entire .ssh dir. – Ilya Oct 13 '16 at 11:39
  • Going through the linked article, you can see the troubleshooting section with $ chmod 700 ~/.ssh, which is in this case equivalent to the above suggested. – Jakuje Oct 13 '16 at 11:40

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