pi@raspberrypi:~ $ ssh -vvv root@172.29.3.76 > ssh.log                                                                                                                                                                                                    OpenSSH_7.4p1 Raspbian-10+deb9u3, OpenSSL 1.0.2l  25 May 2017                                                                                                                                                                                             debug1: Reading configuration data /etc/ssh/ssh_config                                                                                                                                                                                                    debug1: /etc/ssh/ssh_config line 19: Applying options for *                                                                                                                                                                                               debug2: resolving "172.29.3.76" port 22                                                                                                                                                                                                                   debug2: ssh_connect_direct: needpriv 0                                                                                                                                                                                                                    debug1: Connecting to 172.29.3.76 [172.29.3.76] port 22.                                                                                                                                                                                                  debug1: Connection established.                                                                                                                                                                                                                           debug1: identity file /home/pi/.ssh/id_rsa type 1                                                                                                                                                                                                         debug1: key_load_public: No such file or directory                                                                                                                                                                                                        debug1: identity file /home/pi/.ssh/id_rsa-cert type -1                                                                                                                                                                                                   debug1: key_load_public: No such file or directory                                                                                                                                                                                                        debug1: identity file /home/pi/.ssh/id_dsa type -1                                                                                                                                                                                                        debug1: key_load_public: No such file or directory                                                                                                                                                                                                        debug1: identity file /home/pi/.ssh/id_dsa-cert type -1                                                                                                                                                                                                   debug1: key_load_public: No such file or directory                                                                                                                                                                                                        debug1: identity file /home/pi/.ssh/id_ecdsa type -1                                                                                                                                                                                                      debug1: key_load_public: No such file or directory                                                                                                                                                                                                        debug1: identity file /home/pi/.ssh/id_ecdsa-cert type -1                                                                                                                                                                                                 debug1: key_load_public: No such file or directory                                                                                                                                                                                                        debug1: identity file /home/pi/.ssh/id_ed25519 type -1                                                                                                                                                                                                    debug1: key_load_public: No such file or directory                                                                                                                                                                                                        debug1: identity file /home/pi/.ssh/id_ed25519-cert type -1                                                                                                                                                                                               debug1: Enabling compatibility mode for protocol 2.0                                                                                                                                                                                                      debug1: Local version string SSH-2.0-OpenSSH_7.4p1 Raspbian-10+deb9u3                                                                                                                                                                                     debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6                                                                                                                                                                                  debug1: match: OpenSSH_6.6 pat OpenSSH_6.5*,OpenSSH_6.6* compat 0x14000000                                                                                                                                                                                debug2: fd 3 setting O_NONBLOCK                                                                                                                                                                                                                           debug1: Authenticating to 172.29.3.76:22 as 'root'                                                                                                                                                                                                        debug2: compat_kex_proposal: original KEX proposal: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c                                                                                                                                                debug2: Compat: skipping algorithm "curve25519-sha256@libssh.org"                                                                                                                                                                                         debug2: compat_kex_proposal: compat KEX proposal: curve25519-sha256,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c                                                                                                                                                                               debug3: hostkeys_foreach: reading file "/home/pi/.ssh/known_hosts"                                                                                                                                                                                        debug3: record_hostkey: found key type ECDSA in file /home/pi/.ssh/known_hosts:1                                                                                                                                                                          debug3: load_hostkeys: loaded 1 keys from 172.29.3.76                                                                                                                                                                                                     debug3: order_hostkeyalgs: prefer hostkeyalgs: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@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: curve25519-sha256,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c                                                                                                                                                                                                         debug2: host key algorithms: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa                                                                                                                                                                                     debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc                                                                                       debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc                                                                                       debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1                  debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1                  debug2: compression ctos: none,zlib@openssh.com,zlib                                                                                                                                                                                                      debug2: compression stoc: none,zlib@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: 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: host key algorithms: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256                                                                                                                                                                                          debug2: ciphers ctos: 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: ciphers stoc: 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: MACs ctos: 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: MACs stoc: 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: compression ctos: none,zlib@openssh.com                                                                                                                                                                                                           debug2: compression stoc: none,zlib@openssh.com                                                                                                                                                                                                           debug2: languages ctos:                                                                                                                                                                                                                                   debug2: languages stoc:                                                                                                                                                                                                                                   debug2: first_kex_follows 0                                                                                                                                                                                                                               debug2: reserved 0                                                                                                                                                                                                                                        debug1: kex: algorithm: ecdh-sha2-nistp256                                                                                                                                                                                                                debug1: kex: host key algorithm: ecdsa-sha2-nistp256                                                                                                                                                                                                      debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none                                                                                                                                                       debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none                                                                                                                                                       debug3: send packet: type 30                                                                                                                                                                                                                              debug1: sending SSH2_MSG_KEX_ECDH_INIT                                                                                                                                                                                                                    debug1: expecting SSH2_MSG_KEX_ECDH_REPLY                                                                                                                                                                                                                 debug3: receive packet: type 31                                                                                                                                                                                                                           debug1: Server host key: ecdsa-sha2-nistp256 SHA256:CBjvpGf0NrWF6wjquMcwr2zn3Uh5dJmSnmwe/slaxWA                                                                                                                                                           debug3: hostkeys_foreach: reading file "/home/pi/.ssh/known_hosts"                                                                                                                                                                                        debug3: record_hostkey: found key type ECDSA in file /home/pi/.ssh/known_hosts:1                                                                                                                                                                          debug3: load_hostkeys: loaded 1 keys from 172.29.3.76                                                                                                                                                                                                     debug1: Host '172.29.3.76' is known and matches the ECDSA host key.                                                                                                                                                                                       debug1: Found key in /home/pi/.ssh/known_hosts:1                                                                                                                                                                                                          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                                                                                                                                                                                                                           debug1: SSH2_MSG_NEWKEYS received                                                                                                                                                                                                                         debug2: set_newkeys: mode 0                                                                                                                                                                                                                               debug1: rekey after 134217728 blocks                                                                                                                                                                                                                      debug2: compat_kex_proposal: original KEX proposal: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1                                                                                                                                                           debug2: Compat: skipping algorithm "curve25519-sha256@libssh.org"                                                                                                                                                                                         debug2: compat_kex_proposal: compat KEX proposal: curve25519-sha256,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1                                                                                                                                                                                          debug2: key: /home/pi/.ssh/id_rsa (0x1ae6378)                                                                                                                                                                                                             debug2: key: /home/pi/.ssh/id_dsa ((nil))                                                                                                                                                                                                                 debug2: key: /home/pi/.ssh/id_ecdsa ((nil))                                                                                                                                                                                                               debug2: key: /home/pi/.ssh/id_ed25519 ((nil))                                                                                                                                                                                                             debug3: send packet: type 5                                                                                                                                                                                                                               Authentication failed.