Unable to ssh as centos to my ansible AWS instance Permission denied (publickey,gssapi-keyex,gssapi-with-mic).

[Guruprasad Krishnamurthy]

Hello,

I have been using ansible AWS instance on a CentOs machine for a couple of days now. However on logging in now I get this error. The machine is running fine, and I need to retrieve data from it. Any suggestions ? Thanks.

Prasad

prasad@prasad-Lenovo-IdeaPad-S510p:~/aws-connect-keys$ ssh -i KaaenaatKeys.pem ro...@ec2-54-201-142-1.us-west-2.compute.amazonaws.com
Please login as the user "centos" rather than the user "root".

Connection to ec2-54-201-142-1.us-west-2.compute.amazonaws.com closed.

prasad@prasad-Lenovo-IdeaPad-S510p:~/aws-connect-keys$ ssh -i KaaenaatKeys.pem cen...@ec2-54-201-142-1.us-west-2.compute.amazonaws.com
Permission denied (publickey,gssapi-keyex,gssapi-with-mic).

Debug logs attached.
prasad@prasad-Lenovo-IdeaPad-S510p:~/aws-connect-keys$ ssh -i KaaenaatKeys.pem -vvv cen...@ec2-54-201-142-1.us-west-2.compute.amazonaws.com
OpenSSH_7.2p2 Ubuntu-4ubuntu2.1, OpenSSL 1.0.2g  1 Mar 2016
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolving "ec2-54-201-142-1.us-west-2.compute.amazonaws.com" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to ec2-54-201-142-1.us-west-2.compute.amazonaws.com [54.201.142.1] port 22.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file KaaenaatKeys.pem type -1
debug1: key_load_public: No such file or directory
debug1: identity file KaaenaatKeys.pem-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.1
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
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to ec2-54-201-142-1.us-west-2.compute.amazonaws.com:22 as 'centos'
debug3: hostkeys_foreach: reading file "/home/prasad/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/prasad/.ssh/known_hosts:65
debug3: load_hostkeys: loaded 1 keys from ec2-54-201-142-1.us-west-2.compute.amazonaws.com
debug3: order_hostkeyalgs: prefer hostkeyalgs: ecdsa-sha2-nis...@openssh.com,ecdsa-sha2-nis...@openssh.com,ecdsa-sha2-nis...@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
debug3: send packet: type 20
debug1: SSH2_MSG_KEXINIT sent
debug3: receive packet: type 20
debug1: SSH2_MSG_KEXINIT received
debug2: local client KEXINIT proposal
debug2: KEX algorithms: curve255...@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,ext-info-c
debug2: host key algorithms: ecdsa-sha2-nis...@openssh.com,ecdsa-sha2-nis...@openssh.com,ecdsa-sha2-nis...@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed2551...@openssh.com,ssh-rsa-...@openssh.com,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: chacha20...@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes12...@openssh.com,aes25...@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc,3des-cbc
debug2: ciphers stoc: chacha20...@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes12...@openssh.com,aes25...@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc,3des-cbc
debug2: MACs ctos: umac-...@openssh.com,umac-1...@openssh.com,hmac-sha...@openssh.com,hmac-sha...@openssh.com,hmac-s...@openssh.com,uma...@openssh.com,umac...@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-...@openssh.com,umac-1...@openssh.com,hmac-sha...@openssh.com,hmac-sha...@openssh.com,hmac-s...@openssh.com,uma...@openssh.com,umac...@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,zl...@openssh.com,zlib
debug2: compression stoc: none,zl...@openssh.com,zlib
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: curve255...@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: host key algorithms: ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes12...@openssh.com,aes25...@openssh.com,chacha20...@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijnda...@lysator.liu.se
debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes12...@openssh.com,aes25...@openssh.com,chacha20...@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijnda...@lysator.liu.se
debug2: MACs ctos: hmac-m...@openssh.com,hmac-s...@openssh.com,umac-...@openssh.com,umac-1...@openssh.com,hmac-sha...@openssh.com,hmac-sha...@openssh.com,hmac-ripe...@openssh.com,hmac-sha...@openssh.com,hmac-md...@openssh.com,hmac-md5,hmac-sha1,uma...@openssh.com,umac...@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ri...@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: MACs stoc: hmac-m...@openssh.com,hmac-s...@openssh.com,umac-...@openssh.com,umac-1...@openssh.com,hmac-sha...@openssh.com,hmac-sha...@openssh.com,hmac-ripe...@openssh.com,hmac-sha...@openssh.com,hmac-md...@openssh.com,hmac-md5,hmac-sha1,uma...@openssh.com,umac...@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ri...@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: compression ctos: none,zl...@openssh.com
debug2: compression stoc: none,zl...@openssh.com
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: curve255...@libssh.org
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: chacha20...@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20...@openssh.com MAC: <implicit> compression: none
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:snipped
debug3: hostkeys_foreach: reading file "/home/prasad/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/prasad/.ssh/known_hosts:65
debug3: load_hostkeys: loaded 1 keys from ec2-54-201-142-1.us-west-2.compute.amazonaws.com
debug3: hostkeys_foreach: reading file "/home/prasad/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/prasad/.ssh/known_hosts:66
debug3: load_hostkeys: loaded 1 keys from 54.201.142.1
debug1: Host 'ec2-54-201-142-1.us-west-2.compute.amazonaws.com' is known and matches the ECDSA host key.
debug1: Found key in /home/prasad/.ssh/known_hosts:65
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug2: set_newkeys: mode 0
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS received
debug2: key: KaaenaatKeys.pem ((nil)), explicit
debug3: send packet: type 5
debug3: receive packet: type 6
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug3: send packet: type 50
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic
debug3: start over, passed a different list publickey,gssapi-keyex,gssapi-with-mic
debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_lookup gssapi-keyex
debug3: remaining preferred: gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_is_enabled gssapi-keyex
debug1: Next authentication method: gssapi-keyex
debug1: No valid Key exchange context
debug2: we did not send a packet, disable method
debug3: authmethod_lookup gssapi-with-mic
debug3: remaining preferred: publickey,keyboard-interactive,password
debug3: authmethod_is_enabled gssapi-with-mic
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available

debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available

debug1: Unspecified GSS failure.  Minor code may provide more information


debug1: Unspecified GSS failure.  Minor code may provide more information
No Kerberos credentials available

debug2: we did not send a packet, disable method
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Trying private key: KaaenaatKeys.pem
debug3: sign_and_send_pubkey: RSA SHA256: snipped
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
Permission denied (publickey,gssapi-keyex,gssapi-with-mic).

[balubhai555]

Hello GuruPrasad,

May be Ansible's Public copy is not done into AWS key. So please try to copy ~/.ssh/id_rsa into AWS key. and then connection will be successful.