Eu tenho uma máquina ArchLinux (kernel 4.8.4-1) que tento transformar em um servidor SSH. Nos últimos dias tenho lutado para fazê-lo funcionar. Eu li muitos artigos, tutoriais e outras coisas como esta, mas todos parecem iguais e nenhum resolve o meu problema.
Depois de correr
$ssh -vvv alagris@Oelkozadam
Eu recebo:
OpenSSH_7.3p1, OpenSSL 1.0.2j 26 Sep 2016
debug1: Reading configuration data /home/alagris/.ssh/config
debug1: /home/alagris/.ssh/config line 1: Applying options for Oelkozadam
debug1: Reading configuration data /etc/ssh/ssh_config
debug2: resolving "oelkozadam" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to oelkozadam [192.168.7.145] port 22.
debug1: Connection established.
debug1: identity file /home/alagris/.ssh/test type 1
debug1: key_load_public: No such file or directory
debug1: identity file /home/alagris/.ssh/test-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.3
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.3
debug1: match: OpenSSH_7.3 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to oelkozadam:22 as 'alagris'
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: [email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nist p521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,dif fie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c
debug2: host key algorithms: [email protected],ecdsa-sha2-nistp384-cert-v01@openss h.com,[email protected],[email protected],ssh-rsa-cert-v01@openssh. com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed2551 9,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected] om,[email protected],aes128-cbc,aes192-cbc,aes256-cbc,3des-cbc
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected] om,[email protected],aes128-cbc,aes192-cbc,aes256-cbc,3des-cbc
debug2: MACs ctos: [email protected],[email protected],[email protected],hmac-sh [email protected],[email protected],[email protected],[email protected],hmac-sha2-256,h mac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],hmac-sh [email protected],[email protected],[email protected],[email protected],hmac-sha2-256,h mac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected],zlib
debug2: compression stoc: none,[email protected],zlib
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: [email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nist p521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,dif fie-hellman-group14-sha256,diffie-hellman-group14-sha1
debug2: host key algorithms: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected] om,[email protected]
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected] om,[email protected]
debug2: MACs ctos: [email protected],[email protected],[email protected],hmac-sh [email protected],[email protected],[email protected],[email protected],hmac-sha2-256,h mac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],hmac-sh [email protected],[email protected],[email protected],[email protected],hmac-sha2-256,h mac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected]
debug2: compression stoc: none,[email protected]
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: [email protected]
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none
debug1: kex: client->server cipher: [email protected] 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:LOy/ttmSoIpf6+H0jRYCVveaNrhjTRDV61fCx6CQxQ4
The authenticity of host 'oelkozadam (192.168.7.145)' can't be established.
ECDSA key fingerprint is SHA256:LOy/ttmSoIpf6+H0jRYCVveaNrhjTRDV61fCx6CQxQ4.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'oelkozadam,192.168.7.145' (ECDSA) to the list of known hosts.
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: /home/alagris/.ssh/test (0x55ad2b5b8360), explicit, agent
debug3: send packet: type 5
debug3: receive packet: type 7
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
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 53
debug3: input_userauth_banner
Welcome to Oelkozadam's remote workstation. Intruders are not so welcome.
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey
debug3: start over, passed a different list publickey
debug3: preferred 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 RSA public key: /home/alagris/.ssh/test
debug3: send_pubkey_test
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
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
Permission denied (publickey).
Estas são as permissões:
chmod 700 ~/.ssh
chmod 644 ~/.ssh/authorized_keys
chown alagris:users ~/.ssh/authorized_keys
Eu gerei chaves com este comando:
ssh-keygen -b 3072 -f "~/.ssh/$key" -P "$pass" -C "$(whoami)@$(hostname)-$(date -I)"
e usei cat para anexar a chave pública a ~/.ssh/authorized_keys
~/.ssh/config tem a seguinte aparência:
Host Oelkozadam
IdentitiesOnly yes
IdentityFile ~/.ssh/test
/etc/ssh/sshd_config tem a seguinte aparência:
Port 22
AddressFamily any
ListenAddress 192.168.7.145
AllowUsers remote_user alagris
PermitRootLogin no
Banner /my/config/SSH_ServerBanner
PasswordAuthentication no
ChallengeResponseAuthentication no
AuthorizedKeysFile ~/.ssh/authorized_keys
ChallengeResponseAuthentication no
UsePAM yes
Subsystem sftp /usr/lib/ssh/sftp-server
PrintMotd no
"$systemctl edit sshd.socket" tem a seguinte aparência:
[Socket]
ListenStream=
ListenStream=22
Não tenho ideia do que mais poderia fazer para fazer funcionar. Também tentei fazer SSH do meu laptop Mac via LAN, mas obtive resultados semelhantes.
(editar: removi todos os arquivos em ~/.ssh e gerei test e test.pub do zero, adicionei test.pub a ~/.ssh/authorized_keys, mais uma vez configurei permissões em todos esses arquivos, reiniciei o computador, executei
eval $(ssh-agent)
ssh-add ~/.ssh/test
e conectado novamente. A saída mudou ligeiramente. Agora diz:
Offering RSA public key: /home/alagris/.ssh/test
O anterior:
Offering RSA public key: /my/config/SSH/test
provavelmente foi culpa de algumas alterações não aplicadas que foram atualizadas após a reinicialização. Além disso, um fato interessante é que ao recriar o arquivoauthorized_keys, a chave que gerei para o meu computador Mac foi perdida e ainda assim a saída da conexão ssh é absolutamente a mesma. É muito semelhante à saída na máquina local, mas no final:
send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey
debug1: Trying private key: /Users/alagris/.ssh/id_dsa
debug3: no such identity: /Users/alagris/.ssh/id_dsa: No such file or directory
debug1: Trying private key: /Users/alagris/.ssh/id_ecdsa
debug3: no such identity: /Users/alagris/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: /Users/alagris/.ssh/id_ed25519
debug3: no such identity: /Users/alagris/.ssh/id_ed25519: No such file or directory
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
Permission denied (publickey).
)
PS. Eu gostaria de poder ver todos os logs vindos diretamente do servidor, mas parece que no ArchLinux não há arquivos como /var/log/auth.log. Só consigo visualizar o journalctl, que parece estar bastante vazio.
Responder1
de acordo com seu .ssh/config
~/.ssh/config tem a seguinte aparência:
Host Oelkozadam
IdentitiesOnly yes
IdentityFile ~/.ssh/test
você usa ~/.ssh/testcomo chave privada, a chave pública correspondente está listada no authorized_keysarquivo?
Além disso, você menciona uma senha:
Eu gerei chaves com este comando:
ssh-keygen -b 3072 -f "~/.ssh/$key" -P "$pass" -C "$(whoami)@$(hostname)-$(date -I)"
esta chave está carregada (usando ssh-add)?
Então verifique isso
- parte pública
~/.ssh/testestá em chaves_autorizadas ~/.ssh/testestá carregado (usessh-add -l)
Responder2
Eu não tenho idéia do que aconteceu. Eu meio que desisti, mas depois de algumas reinicializações, ele começou a funcionar magicamente.