STPP-соединение слишком много попыток проверки публичного ключа были сделаны ошибки

Я пытаюсь установить соединение sftp. В пункте назначения используется открытый ключ + аутентификация по паролю и порт 2222.

Мне удалось подключиться с нашего существующего хоста Linux к месту назначения. Наш существующий хост Linux использует Openssh_5.3.

sftp -v -oPort=2222 -oIdentityFile=/home/xyz/.ssh/abc/id_rsa user@sftp.abc.com debug1: Authentications that can continue: password,publickey,keyboard-interactive debug1: Offering public key: /home/xyz/.ssh/abc/id_rsa debug1: Server accepts key: pkalg ssh-rsa blen 277 debug1: read PEM private key done: type RSA Authenticated with partial success. debug1: Authentications that can continue: password,publickey,keyboard-interactive debug1: Offering public key ... ... debug1: Next authentication method: keyboard-interactive Here it goes to the next authentication method keyboard-interactive with no problem. 

Я не могу подключиться с нашего следующего хоста Linux. Он использует OpenSSH_6.6.1. Наш новый Linux-хост имеет тот же исходящий IP-адрес, и пункт назначения не фильтрует соединение по IP-адресу. Я использую точно такой же файл закрытого ключа и команду sftp. Так что похоже на проблему ssh?

Я получил ошибку:

sftp -v -oPort=2222 -oIdentityFile=/home/xyz/.ssh/abc/id_rsa user@sftp.abc.com debug1: Authentications that can continue: password,publickey,keyboard-interactive debug1: Offering RSA public key: /home/xyz/.ssh/abc/id_rsa debug1: Server accepts key: pkalg ssh-rsa blen 277 debug1: key_parse_private2: missing begin marker debug1: read PEM private key done: type RSA Authenticated with partial success. debug1: Authentications that can continue: password,publickey,keyboard-interactive debug1: Offering RSA public key: .... ...... debug1: Authentications that can continue: password,publickey,keyboard-interactive debug1: Offering RSA public key: /home/xyz/.ssh/abc/id_rsa debug1: Server accepts key: pkalg ssh-rsa blen 277 debug1: key_parse_private2: missing begin marker debug1: read PEM private key done: type RSA Authenticated with partial success. debug1: Authentications that can continue: password,publickey,keyboard-interactive debug1: Offering RSA public key: .... ...... Here it goes as infinite loop and keep trying the same private key again and again (although it already got partial success) until it got "**Too many publickey verification attempts were made**" error. 

Если я запускаю с -vvv, вот вывод:

debug1: Authentications that can continue: password,publickey,keyboard-interactive debug1: Trying private key: /home/xyz/.ssh/abc/id_rsa debug1: key_parse_private2: missing begin marker debug1: read PEM private key done: type RSA debug3: sign_and_send_pubkey: RSA 7f:69:c6:c9:be:54:6e:7a:35:7d:63:b6:7f:28:0f:20 debug2: we sent a publickey packet, wait for reply Authenticated with partial success. debug2: key: /home/xyz/.ssh/abc/id_rsa ((nil)), explicit debug2: key: /home/xyz/.ssh/id_rsa ((nil)), debug2: key: /home/xyz/.ssh/id_dsa ((nil)), debug1: Authentications that can continue: password,publickey,keyboard-interactive debug1: Trying private key: /home/xyz/.ssh/abc/id_rsa debug1: key_parse_private2: missing begin marker debug1: read PEM private key done: type RSA debug3: sign_and_send_pubkey: RSA 7f:69:c6:c9:be:54:6e:7a:35:7d:63:b6:7f:28:0f:20 debug2: we sent a publickey packet, wait for reply Authenticated with partial success. debug2: key: /home/xyz/.ssh/abc/id_rsa ((nil)), explicit debug2: key: /home/xyz/.ssh/id_rsa ((nil)), debug2: key: /home/xyz/.ssh/id_dsa ((nil)), debug1: Authentications that can continue: password,publickey,keyboard-interactive debug1: Trying private key: /home/xyz/.ssh/abc/id_rsa debug1: key_parse_private2: missing begin marker debug1: read PEM private key done: type RSA debug3: sign_and_send_pubkey: RSA 7f:69:c6:c9:be:54:6e:7a:35:7d:63:b6:7f:28:0f:20 debug2: we sent a publickey packet, wait for reply Authenticated with partial success. debug2: key: /home/xyz/.ssh/abc/id_rsa ((nil)), explicit debug2: key: /home/xyz/.ssh/id_rsa ((nil)), debug2: key: /home/xyz/.ssh/id_dsa ((nil)), debug1: Authentications that can continue: password,publickey,keyboard-interactive debug1: Trying private key: /home/xyz/.ssh/abc/id_rsa debug1: key_parse_private2: missing begin marker debug1: read PEM private key done: type RSA debug3: sign_and_send_pubkey: RSA 7f:69:c6:c9:be:54:6e:7a:35:7d:63:b6:7f:28:0f:20 debug2: we sent a publickey packet, wait for reply  This goes on again and again, so I just killed it.