Permissão SSH negada (publickey) - falha na etapa preauth

Question

eu cansei de solução diferente encontrada na internet para resolver esse problema sem sorte:

• Permissões corretas para chaves em /etc/ssh/ , 400 para chave rsa privada e 600 para chave rsa pública.
• 700 para a pasta /home/usersrv/.ssh/ . authorized_keys não existia. Eu criei isto depois com permissão 600; arquivo ainda vazio, eu deveria copiar algo dentro? O diretório inicial está no mesmo volume com o sistema.
• Tentei com portas diferentes: 22 e 2222

Configuração do servidor /etc/ssh/sshd_config uncommented part:

Port 2222
AddressFamily any
ListenAddress 0.0.0.0
ListenAddress ::

HostKey /etc/ssh/ssh_host_rsa_key 

PermitRootLogin no  

RSAAuthentication yes
PubkeyAuthentication yes

# To disable tunneled clear text passwords, change to no here!
PasswordAuthentication no
PermitEmptyPasswords no  

# Change to yes to enable challenge-response passwords (beware issues with# some PAM modules and threads)
ChallengeResponseAuthentication no   

KerberosAuthentication no
GSSAPIAuthentication no 
UsePAM yes
X11Forwarding yes
X11UseLocalhost yes
PermitTTY yes
PrintMotd no 

Quando tento conectar-me a partir do Win + PuTTy, tenho uma mensagem de erro: Não há métodos de autenticação suportados disponíveis (chave pública enviada pelo servidor)

    /etc/ssh/sshd_config line 37: Deprecated option RSAAuthentication
debug1: sshd version OpenSSH_7.4, OpenSSL 1.0.2l  25 May 2017
debug1: private host key #0: ssh-rsa SHA256:F61cGX7XOyKpBMChyVtxyaH2T23NoIr9+iAKCjRAbO4
debug1: rexec_argv[0]='/usr/sbin/sshd'
debug1: rexec_argv[1]='-d'
debug1: Set /proc/self/oom_score_adj from 0 to -1000
debug1: Bind to port 22 on ::.
Server listening on :: port 22.
debug1: Bind to port 22 on 0.0.0.0.
Server listening on 0.0.0.0 port 22.
debug1: Server will not fork when running in debugging mode.
debug1: rexec start in 5 out 5 newsock 5 pipe -1 sock 8
debug1: inetd sockets after dupping: 3, 3
Connection from 192.168.1.98 port 40922 on 192.168.1.98 port 22
debug1: Client protocol version 2.0; client software version OpenSSH_7.4p1 Debian-10+deb9u3
debug1: match: OpenSSH_7.4p1 Debian-10+deb9u3 pat OpenSSH* compat 0x04000000
debug1: Local version string SSH-2.0-OpenSSH_7.4p1 Debian-10+deb9u3
debug1: Enabling compatibility mode for protocol 2.0
debug1: permanently_set_uid: 110/65534 [preauth]
debug1: list_hostkey_types: ssh-rsa,rsa-sha2-512,rsa-sha2-256 [preauth]
debug1: SSH2_MSG_KEXINIT sent [preauth]
debug1: SSH2_MSG_KEXINIT received [preauth]
debug1: kex: algorithm: curve25519-sha256 [preauth]
debug1: kex: host key algorithm: rsa-sha2-512 [preauth]
debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none [preauth]
debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none [preauth]
debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth]
debug1: rekey after 134217728 blocks [preauth]
debug1: SSH2_MSG_NEWKEYS sent [preauth]
debug1: expecting SSH2_MSG_NEWKEYS [preauth]
debug1: SSH2_MSG_NEWKEYS received [preauth]
debug1: rekey after 134217728 blocks [preauth]
debug1: KEX done [preauth]
debug1: userauth-request for user usersrv service ssh-connection method none [preauth]
debug1: attempt 0 failures 0 [preauth]
reprocess config line 37: Deprecated option RSAAuthentication
debug1: PAM: initializing for "usersrv"
debug1: PAM: setting PAM_RHOST to "192.168.1.98"
debug1: PAM: setting PAM_TTY to "ssh"
Connection closed by 192.168.1.98 port 40922 [preauth]
debug1: do_cleanup [preauth]
debug1: monitor_read_log: child log fd closed
debug1: do_cleanup
debug1: PAM: cleanup
debug1: Killing privsep child 941
debug1: audit_event: unhandled event 12

E então eu tento fazer o login localmente (diretamente sob usersrv) m recebi um erro: Permissão negada (publickey).

/etc/ssh/sshd_config line 37: Deprecated option RSAAuthentication
debug1: sshd version OpenSSH_7.4, OpenSSL 1.0.2l  25 May 2017
debug1: private host key #0: ssh-rsa SHA256:F61cGX7XOyKpBMChyVtxyaH2T23NoIr9+iAKCjRAbO4
debug1: rexec_argv[0]='/usr/sbin/sshd'
debug1: rexec_argv[1]='-d'
debug1: Set /proc/self/oom_score_adj from 0 to -1000
debug1: Bind to port 2222 on ::.
Server listening on :: port 2222.
debug1: Bind to port 2222 on 0.0.0.0.
Server listening on 0.0.0.0 port 2222.
debug1: Server will not fork when running in debugging mode.
debug1: rexec start in 5 out 5 newsock 5 pipe -1 sock 8
debug1: inetd sockets after dupping: 3, 3
Connection from 192.168.1.98 port 54596 on 192.168.1.98 port 2222
debug1: Client protocol version 2.0; client software version OpenSSH_7.4p1 Debian-10+deb9u3
debug1: match: OpenSSH_7.4p1 Debian-10+deb9u3 pat OpenSSH* compat 0x04000000
debug1: Local version string SSH-2.0-OpenSSH_7.4p1 Debian-10+deb9u3
debug1: Enabling compatibility mode for protocol 2.0
debug1: permanently_set_uid: 110/65534 [preauth]
debug1: list_hostkey_types: ssh-rsa,rsa-sha2-512,rsa-sha2-256 [preauth]
debug1: SSH2_MSG_KEXINIT sent [preauth]
debug1: SSH2_MSG_KEXINIT received [preauth]
debug1: kex: algorithm: curve25519-sha256 [preauth]
debug1: kex: host key algorithm: rsa-sha2-512 [preauth]
debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none [preauth]
debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none [preauth]
debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth]
debug1: rekey after 134217728 blocks [preauth]
debug1: SSH2_MSG_NEWKEYS sent [preauth]
debug1: expecting SSH2_MSG_NEWKEYS [preauth]
debug1: SSH2_MSG_NEWKEYS received [preauth]
debug1: rekey after 134217728 blocks [preauth]
debug1: KEX done [preauth]
debug1: userauth-request for user usersrv service ssh-connection method none [preauth]
debug1: attempt 0 failures 0 [preauth]
reprocess config line 37: Deprecated option RSAAuthentication
debug1: PAM: initializing for "usersrv"
debug1: PAM: setting PAM_RHOST to "192.168.1.98"
debug1: PAM: setting PAM_TTY to "ssh"
Connection closed by 192.168.1.98 port 54596 [preauth]
debug1: do_cleanup [preauth]
debug1: monitor_read_log: child log fd closed
debug1: do_cleanup
debug1: PAM: cleanup
debug1: Killing privsep child 1111
debug1: audit_event: unhandled event 12

Alguém teve o mesmo problema ou conhece uma solução? Atenciosamente.

    

Answer 1

Parece que você não adicionou a chave pública do seu computador ao seu servidor. As chaves públicas dos computadores clientes são armazenadas no arquivo authorized_keys .

Altere esta linha em / etc / ssh / sshd_config para sim (mais tarde você pode voltar a usá-la novamente)

PasswordAuthentication yes

E reinicie o ssh demon

sudo service ssh restart

Emita o seguinte comando do seu computador cliente para exportar a chave pública para o servidor:

ssh-copy-id usersrv@server

No prompt de comando, digite sua senha. Depois disso, você obterá acesso ao seu servidor por meio de chaves ssh.