Aqui está o comando do CLIENTE :
ssh -p 2xxx -vvv -i /home/jxxxxx/.ssh/authorized_keys ixxxxx.com
Aqui está a parte pertinente da informação de depuração (-vvv):
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /home/jxxxxx/.ssh/authorized_keys (0x7ff95d1456b0), explicit
debug1: Authentications that can continue: publickey,password
debug3: start over, passed a different list publickey,password
debug3: preferred gssapi-keyex,gssapi-with-mic,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 DSA public key: /home/jxxxxx/.ssh/authorized_keys
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Authentications that can continue: publickey,password
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
Aqui estão as informações de /var/log/auth.log no SERVER :
Aug 9 09:11:00 ixxxxx sshd[8200]: Connection closed by xxx.xxx.xxx.xxx(CLIENT ip) [preauth]
Aqui estão as permissões no SERVER :
/home/jxxxxx 755
/home/jxxxxx/.ssh 700
/home/jxxxxx/.ssh/id_dsa and id_rsa 600
Aqui estão as permissões no CLIENTE :
/home/jxxxxx 755
/home/jxxxxx/.ssh 700
/home/jxxxxx/.ssh/authorized_keys 600 (contains id_dsa.pub and id_rsa.pub)
Partes pertinentes de / etc / ssh / sshd_config (SERVER e CLIENT)
Port 2xxx
Protocol 2
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_dsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
HostKey /etc/ssh/ssh_host_ed25519_key
LoginGraceTime 120
PermitRootLogin no
AllowUsers jxxxxx
StrictModes yes
RSAAuthentication yes
PubkeyAuthentication yes
ChallengeResponseAuthentication no
UsePAM yes
Alguma sugestão? Esta é a minha primeira consulta no StackExchange, então este é um stumper real para mim. Nenhuma das outras perguntas / respostas do askubuntu sobre este tópico está fazendo o truque.