(postado anteriormente em stackoverflow por erro)
Estou executando um monte de servidores com o Ubuntu 14.04.1 (sun, hyperion, ...), que usam chaves públicas (OpenSSH_6.6.1, OpenSSL 1.0.1f 6 de janeiro de 2014 em todas as máquinas) para rsync sem problemas. Quase tudo ...
Uma conexão falha sem alterações nas configurações ou chaves. Então eu vou tentar adicionar novamente as chaves, verifique se há ECDSA, reinicie / reinicie o ssh e ele funciona novamente. Ou não. Neste caso eu apenas espero uma quantidade aleatória de tempo (1h até 3 meses) e faço o mesmo. Desta vez, resolve o problema - por um tempo.
As partes relevantes de um diff ssh -vvv:
Conexão bem sucedida
debug1: Host 'hyperion.internal' is known and matches the ECDSA host key.
debug1: Found key in /home/bar/.ssh/known_hosts:20
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: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /home/bar/.ssh/id_rsa (0x7f..),
debug2: key: /home/bar/.ssh/id_dsa ((nil)),
debug2: key: /home/bar/.ssh/id_ecdsa ((nil)),
debug2: key: /home/bar/.ssh/id_ed25519 ((nil)),
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 RSA public key: /home/bar/.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 95:...
debug3: sign_and_send_pubkey: RSA 95:...
debug1: key_parse_private2: missing begin marker
debug1: read PEM private key done: type RSA
debug1: Authentication succeeded (publickey).
Authenticated to hyperion.internal ([172.16.0.10]:22).
Conexão com falha
debug1: Host 'hyperion.internal' is known and matches the ECDSA host key.
debug1: Found key in /home/bar/.ssh/known_hosts:20
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: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /home/bar/.ssh/id_rsa (0x7f..),
debug2: key: /home/bar/.ssh/id_dsa ((nil)),
debug2: key: /home/bar/.ssh/id_ecdsa ((nil)),
debug2: key: /home/bar/.ssh/id_ed25519 ((nil)),
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 RSA public key: /home/bar/.ssh/id_rsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Authentications that can continue: publickey,password
debug1: Trying private key: /home/bar/.ssh/id_dsa
debug3: no such identity: /home/bar/.ssh/id_dsa: No such file or directory
debug1: Trying private key: /home/bar/.ssh/id_ecdsa
debug3: no such identity: /home/bar/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: /home/bar/.ssh/id_ed25519
debug3: no such identity: /home/bar/.ssh/id_ed25519: No such file or directory
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
debug1: Next authentication method: password
Coisas que eu verifiquei várias vezes:
- permissões para .ssh / e id_rsa em todas as máquinas
- que estou usando as teclas certas
- que
ssh-copy-id -i /home/bar/.ssh/id_rsa [email protected]
copia as chaves certas para o arquivo right_hosts direito
O que realmente não ajudou, mas foi adicionado ao efeito vodoo / heisenbug:
- reinicializando as máquinas
- reiniciando o serviço ssh
- mexendo nas opções globais do ssh
Eu colei os registros completos com algumas informações editadas no pastebin: parede do log