title: Ansible unable to connect to AWS EC2 instance
body: <p>I'm trying to use Ansible to connect to an AWS EC2 instance from a Codeship build. This has been working perfectly in another AWS region (eu-west-1) but now I want to setup servers in us-east-1 and I'm getting the following error:</p>
  
  <pre><code>&lt;ec2-52-11-9-45.compute-1.amazonaws.com&gt; ESTABLISH SSH CONNECTION FOR USER: ec2-user
  &lt;ec2-52-11-9-45.compute-1.amazonaws.com&gt; SSH: EXEC ssh -C -vvv -o ControlMaster=auto -o ControlPersist=60s -o StrictHostKeyChecking=no -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o User=ec2-user -o ConnectTimeout=10 -o ControlPath=/home/rof/.ansible/cp/ansible-ssh-%h-%p-%r -tt ec2-52-11-9-45.compute-1.amazonaws.com '( umask 22 &amp;&amp; mkdir -p "$( echo $HOME/.ansible/tmp/ansible-tmp-1461915330.37-230126286487108 )" &amp;&amp; echo "$( echo $HOME/.ansible/tmp/ansible-tmp-1461915330.37-230126286487108 )" )'
  fatal: [ec2-52-11-9-45.compute-1.amazonaws.com]: UNREACHABLE! =&gt; {"changed": false, "msg": "ERROR! SSH encountered an unknown error. The output was:\nOpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014
  
  debug1: Reading configuration data /home/rof/.ssh/config
  debug1: Reading configuration data /etc/ssh/ssh_config
  debug1: /etc/ssh/ssh_config line 19: Applying options for *
  debug1: auto-mux: Trying existing master
  debug1: Control socket \"/home/rof/.ansible/cp/ansible-ssh-ec2-52-11-9-45.compute-1.amazonaws.com-22-ec2-user\" does not exist
  debug2: ssh_connect: needpriv 0
  debug1: Connecting to ec2-52-11-9-45.compute-1.amazonaws.com [52.1.39.45] port 22.
  debug2: fd 3 setting O_NONBLOCK
  debug1: fd 3 clearing O_NONBLOCK
  debug1: Connection established.
  debug3: timeout: 10000 ms remain after connect
  debug3: Incorrect RSA1 identifier
  debug3: Could not load \"/home/rof/.ssh/id_rsa\" as a RSA1 public key
  debug1: identity file /home/rof/.ssh/id_rsa type -1
  debug1: identity file /home/rof/.ssh/id_rsa-cert type -1
  debug1: identity file /home/rof/.ssh/id_dsa type -1
  debug1: identity file /home/rof/.ssh/id_dsa-cert type -1
  debug1: identity file /home/rof/.ssh/id_ecdsa type -1
  debug1: identity file /home/rof/.ssh/id_ecdsa-cert type -1
  debug1: identity file /home/rof/.ssh/id_ed25519 type -1
  debug1: identity file /home/rof/.ssh/id_ed25519-cert type -1
  debug1: Enabling compatibility mode for protocol 2.0
  debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.6
  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
  debug3: load_hostkeys: loading entries for host \"ec2-52-11-9-45.compute-1.amazonaws.com\" from file \"/dev/null\"
  debug3: load_hostkeys: loaded 0 keys
  debug1: SSH2_MSG_KEXINIT sent
  debug1: SSH2_MSG_KEXINIT received
  debug2: kex_parse_kexinit: curve25519-sha256@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: kex_parse_kexinit: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ssh-dss-cert-v01@openssh.com,ssh-rsa-cert-v00@openssh.com,ssh-dss-cert-v00@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,ssh-rsa,ssh-dss
  debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,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-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
  debug2: kex_parse_kexinit: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
  debug2: kex_parse_kexinit: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
  debug2: kex_parse_kexinit: zlib@openssh.com,zlib,none
  debug2: kex_parse_kexinit: zlib@openssh.com,zlib,none
  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: curve25519-sha256@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: kex_parse_kexinit: ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519
  debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,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-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
  debug2: kex_parse_kexinit: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
  debug2: kex_parse_kexinit: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,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: setup hmac-md5-etm@openssh.com
  debug1: kex: server-&gt;client aes128-ctr hmac-md5-etm@openssh.com zlib@openssh.com
  debug2: mac_setup: setup hmac-md5-etm@openssh.com
  debug1: kex: client-&gt;server aes128-ctr hmac-md5-etm@openssh.com zlib@openssh.com
  debug1: sending SSH2_MSG_KEX_ECDH_INIT
  debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
  debug1: Server host key: ECDSA f6:db:c0:15:19:17:45:cc:db:6f:16:f4:6f:02:bf:79
  debug3: load_hostkeys: loading entries for host \"ec2-52-11-9-45.compute-1.amazonaws.com\" from file \"/dev/null\"
  debug3: load_hostkeys: loaded 0 keys
  debug3: load_hostkeys: loading entries for host \"52.1.39.45\" from file \"/dev/null\"
  debug3: load_hostkeys: loaded 0 keys
  Warning: Permanently added 'ec2-52-11-9-45.compute-1.amazonaws.com,52.1.39.45' (ECDSA) to the list of known hosts.
  debug1: ssh_ecdsa_verify: signature correct
  debug2: kex_derive_keys
  debug2: set_newkeys: mode 1
  debug1: SSH2_MSG_NEWKEYS sent
  debug1: expecting SSH2_MSG_NEWKEYS
  debug2: set_newkeys: mode 0
  debug1: SSH2_MSG_NEWKEYS received
  debug1: SSH2_MSG_SERVICE_REQUEST sent
  debug2: service_accept: ssh-userauth
  debug1: SSH2_MSG_SERVICE_ACCEPT received
  debug2: key: /home/rof/.ssh/id_rsa (0x7fbfa369ea30),
  debug2: key: /home/rof/.ssh/id_rsa ((nil)),
  debug2: key: /home/rof/.ssh/id_dsa ((nil)),
  debug2: key: /home/rof/.ssh/id_ecdsa ((nil)),
  debug2: key: /home/rof/.ssh/id_ed25519 ((nil)),
  debug1: Authentications that can continue: publickey
  debug3: start over, passed a different list publickey
  debug3: preferred gssapi-with-mic,gssapi-keyex,hostbased,publickey
  debug3: authmethod_lookup publickey
  debug3: remaining preferred: ,gssapi-keyex,hostbased,publickey
  debug3: authmethod_is_enabled publickey
  debug1: Next authentication method: publickey
  debug1: Offering RSA public key: /home/rof/.ssh/id_rsa
  debug3: send_pubkey_test
  debug2: we sent a publickey packet, wait for reply
  debug1: Server accepts key: pkalg ssh-rsa blen 279
  debug2: input_userauth_pk_ok: fp 6a:73:a4:d1:c5:79:9d:6b:6f:3f:7d:cd:8e:60:97:84
  debug3: sign_and_send_pubkey: RSA 6a:73:a4:d1:c5:79:9d:6b:6f:3f:7d:cd:8e:60:97:84
  debug1: Enabling compression at level 6.
  debug1: Authentication succeeded (publickey).
  Authenticated to ec2-52-11-9-45.compute-1.amazonaws.com ([52.1.39.45]:22).
  debug1: setting up multiplex master socket
  debug3: muxserver_listen: temporary control path /home/rof/.ansible/cp/ansible-ssh-ec2-52-11-9-45.compute-1.amazonaws.com-22-ec2-user.WpJOoaH4MuX8djA0
  debug2: fd 4 setting O_NONBLOCK
  debug3: fd 4 is O_NONBLOCK
  debug3: fd 4 is O_NONBLOCK
  debug1: channel 0: new [/home/rof/.ansible/cp/ansible-ssh-ec2-52-11-9-45.compute-1.amazonaws.com-22-ec2-user]
  debug3: muxserver_listen: mux listener channel 0 fd 4
  debug2: fd 3 setting TCP_NODELAY
  debug3: packet_set_tos: set IP_TOS 0x08
  debug1: control_persist_detach: backgrounding master process
  debug2: control_persist_detach: background process is 8248
  Control socket connect(/home/rof/.ansible/cp/ansible-ssh-ec2-52-11-9-45.compute-1.amazonaws.com-22-ec2-user): Connection refused
  Failed to connect to new control master
  ", "unreachable": true}
  </code></pre>
  
  <p>I am able to connect with a simple ssh command like this <code>ssh ec2-user@ec2-52-11-9-45.compute-1.amazonaws.com</code> so I'm pretty sure the ssh keys are setup correctly. The only difference is the region and the AMI, but the AMI is Amazon Linux in both cases.</p>
  
  <p>Can someone tell me the problem or point me in the right direction please.</p>