Почему не получается войти на сервер?

Question

[Verriant]

Здравствуйте! У меня есть две виртуалки с Ubuntu на двух разных хостерах. Пару недель назад у меня не было проблем с подключением к ним по SSH (вход по паролю). Но вчера обнаружилось, что я не могу войти ни в один из них (ни через командную строку, ни через Putty). Все время пишет "Permission denied, please try again" .
Через учетку на хостинге я сбрасывал пароль, но новые пароли все равно не подходят. Захожу под рутом :" ssh root@111.222.333.44". Других пользователей на виртуалке нет. По логам хостера видно, что никакой замены пароля до вчерашнего дня не было ни на одной их машин. Притом ВПН на этих машинах продолжает работать.
Будь это только одна машина я бы мог все списать на потерянный пароль. Но я и пароли сбрасывал и машины совсем разные на разных хостерах. Не могу понять в чем дело.

Comments

[Ипатьев]

Добавьте ключик -v и копируйте сюда вывод
или даже сразу -vvv

[Verriant]

Ипатьев,
OpenSSH_for_Windows_9.5p1, LibreSSL 3.8.2
debug3: Failed to open file:C:/Users/DMAN/.ssh/config error:2
debug3: Failed to open file:C:/ProgramData/ssh/ssh_config error:2
debug2: resolve_canonicalize: hostname 11.222.333.44 is address
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts' -> 'C:\\Users\\DMAN/.ssh/known_hosts'
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts2' -> 'C:\\Users\\DMAN/.ssh/known_hosts2'
debug3: ssh_connect_direct: entering
debug1: Connecting to 11.222.333.44 [11.222.333.44] port 22.
debug1: Connection established.
debug1: identity file C:\\Users\\DMAN/.ssh/id_rsa type 0
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_rsa-cert error:2
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_rsa-cert.pub error:2
debug3: failed to open file:C:/Users/DMAN/.ssh/id_rsa-cert error:2
debug1: identity file C:\\Users\\DMAN/.ssh/id_rsa-cert type -1
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_ecdsa error:2
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_ecdsa.pub error:2
debug3: failed to open file:C:/Users/DMAN/.ssh/id_ecdsa error:2
debug1: identity file C:\\Users\\DMAN/.ssh/id_ecdsa type -1
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_ecdsa-cert error:2
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_ecdsa-cert.pub error:2
debug3: failed to open file:C:/Users/DMAN/.ssh/id_ecdsa-cert error:2
debug1: identity file C:\\Users\\DMAN/.ssh/id_ecdsa-cert type -1
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_ecdsa_sk error:2
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_ecdsa_sk.pub error:2
debug3: failed to open file:C:/Users/DMAN/.ssh/id_ecdsa_sk error:2
debug1: identity file C:\\Users\\DMAN/.ssh/id_ecdsa_sk type -1
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_ecdsa_sk-cert error:2
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_ecdsa_sk-cert.pub error:2
debug3: failed to open file:C:/Users/DMAN/.ssh/id_ecdsa_sk-cert error:2
debug1: identity file C:\\Users\\DMAN/.ssh/id_ecdsa_sk-cert type -1
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_ed25519 error:2
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_ed25519.pub error:2
debug3: failed to open file:C:/Users/DMAN/.ssh/id_ed25519 error:2
debug1: identity file C:\\Users\\DMAN/.ssh/id_ed25519 type -1
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_ed25519-cert error:2
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_ed25519-cert.pub error:2
debug3: failed to open file:C:/Users/DMAN/.ssh/id_ed25519-cert error:2
debug1: identity file C:\\Users\\DMAN/.ssh/id_ed25519-cert type -1
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_ed25519_sk error:2
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_ed25519_sk.pub error:2
debug3: failed to open file:C:/Users/DMAN/.ssh/id_ed25519_sk error:2
debug1: identity file C:\\Users\\DMAN/.ssh/id_ed25519_sk type -1
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_ed25519_sk-cert error:2
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_ed25519_sk-cert.pub error:2
debug3: failed to open file:C:/Users/DMAN/.ssh/id_ed25519_sk-cert error:2
debug1: identity file C:\\Users\\DMAN/.ssh/id_ed25519_sk-cert type -1
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_xmss error:2
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_xmss.pub error:2
debug3: failed to open file:C:/Users/DMAN/.ssh/id_xmss error:2
debug1: identity file C:\\Users\\DMAN/.ssh/id_xmss type -1
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_xmss-cert error:2
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_xmss-cert.pub error:2
debug3: failed to open file:C:/Users/DMAN/.ssh/id_xmss-cert error:2
debug1: identity file C:\\Users\\DMAN/.ssh/id_xmss-cert type -1
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_dsa error:2
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_dsa.pub error:2
debug3: failed to open file:C:/Users/DMAN/.ssh/id_dsa error:2
debug1: identity file C:\\Users\\DMAN/.ssh/id_dsa type -1
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_dsa-cert error:2
debug3: Failed to open file:C:/Users/DMAN/.ssh/id_dsa-cert.pub error:2
debug3: failed to open file:C:/Users/DMAN/.ssh/id_dsa-cert error:2
debug1: identity file C:\\Users\\DMAN/.ssh/id_dsa-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_for_Windows_9.5
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.9p1 Ubuntu-3ubuntu0.13
debug1: compat_banner: match: OpenSSH_8.9p1 Ubuntu-3ubuntu0.13 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 11.222.333.44:22 as 'root'
debug3: record_hostkey: found key type ED25519 in file C:\\Users\\DMAN/.ssh/known_hosts:4
debug3: record_hostkey: found key type RSA in file C:\\Users\\DMAN/.ssh/known_hosts:5
debug3: record_hostkey: found key type ECDSA in file C:\\Users\\DMAN/.ssh/known_hosts:6
debug3: load_hostkeys_file: loaded 3 keys from 11.222.333.44
debug3: Failed to open file:C:/Users/DMAN/.ssh/known_hosts2 error:2
debug1: load_hostkeys: fopen C:\\Users\\DMAN/.ssh/known_hosts2: No such file or directory
debug3: Failed to open file:C:/ProgramData/ssh/ssh_known_hosts error:2
debug1: load_hostkeys: fopen __PROGRAMDATA__\\ssh/ssh_known_hosts: No such file or directory
debug3: Failed to open file:C:/ProgramData/ssh/ssh_known_hosts2 error:2
debug1: load_hostkeys: fopen __PROGRAMDATA__\\ssh/ssh_known_hosts2: No such file or directory
debug3: order_hostkeyalgs: have matching best-preference key type [e-mail], using HostkeyAlgorithms verbatim
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: curve25519-sha256,[e-mail],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,ext-info-c,[e-mail]
debug2: host key algorithms: [e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[e-mail],[e-mail],rsa-sha2-512,rsa-sha2-256
debug2: ciphers ctos: [e-mail],aes128-ctr,aes192-ctr,aes256-ctr,[e-mail],[e-mail]
debug2: ciphers stoc: [e-mail],aes128-ctr,aes192-ctr,aes256-ctr,[e-mail],[e-mail]
debug2: MACs ctos: [e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],hmac-sha2-256,hmac-sha2-512
debug2: MACs stoc: [e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],hmac-sha2-256,hmac-sha2-512
debug2: compression ctos: none,[e-mail],zlib
debug2: compression stoc: none,[e-mail],zlib
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,[e-mail],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,[e-mail],diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,[e-mail]
debug2: host key algorithms: rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: [e-mail],aes128-ctr,aes192-ctr,aes256-ctr,[e-mail],[e-mail]
debug2: ciphers stoc: [e-mail],aes128-ctr,aes192-ctr,aes256-ctr,[e-mail],[e-mail]
debug2: MACs ctos: [e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[e-mail]
debug2: compression stoc: none,[e-mail]
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug3: kex_choose_conf: will use strict KEX ordering
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ssh-ed25519
debug1: kex: server->client cipher: [e-mail] MAC: compression: none
debug1: kex: client->server cipher: [e-mail] MAC: compression: none
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: SSH2_MSG_KEX_ECDH_REPLY received

[Verriant]

Ипатьев,
Продолжение:
debug1: Server host key: ssh-ed25519 SHA256:zdtKDFactNm+Cb2i5WHJ5L7sKtrcnxHdc3D5q7RiVzA
debug3: record_hostkey: found key type ED25519 in file C:\\Users\\DMAN/.ssh/known_hosts:4
debug3: record_hostkey: found key type RSA in file C:\\Users\\DMAN/.ssh/known_hosts:5
debug3: record_hostkey: found key type ECDSA in file C:\\Users\\DMAN/.ssh/known_hosts:6
debug3: load_hostkeys_file: loaded 3 keys from 11.222.333.44
debug3: Failed to open file:C:/Users/DMAN/.ssh/known_hosts2 error:2
debug1: load_hostkeys: fopen C:\\Users\\DMAN/.ssh/known_hosts2: No such file or directory
debug3: Failed to open file:C:/ProgramData/ssh/ssh_known_hosts error:2
debug1: load_hostkeys: fopen __PROGRAMDATA__\\ssh/ssh_known_hosts: No such file or directory
debug3: Failed to open file:C:/ProgramData/ssh/ssh_known_hosts2 error:2
debug1: load_hostkeys: fopen __PROGRAMDATA__\\ssh/ssh_known_hosts2: No such file or directory
debug1: Host '11.222.333.44' is known and matches the ED25519 host key.
debug1: Found key in C:\\Users\\DMAN/.ssh/known_hosts:4
debug3: send packet: type 21
debug1: ssh_packet_send2_wrapped: resetting send seqnr 3
debug2: ssh_set_newkeys: mode 1
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug1: ssh_packet_read_poll2: resetting read seqnr 3
debug1: SSH2_MSG_NEWKEYS received
debug2: ssh_set_newkeys: mode 0
debug1: rekey in after 134217728 blocks
debug3: ssh_get_authentication_socket_path: path '\\\\.\\pipe\\openssh-ssh-agent'
debug2: get_agent_identities: ssh_agent_bind_hostkey: invalid format
debug1: get_agent_identities: agent returned 1 keys
debug1: Will attempt key: DmaN@DESKTOP-UTS2PQ4 ED25519 SHA256:8bMNMhmS2037mx3cUf8VZxsEYLUUFmgV1zbNDi2S07Q agent
debug1: Will attempt key: C:\\Users\\DMAN/.ssh/id_rsa RSA SHA256:fBMY9Urljo4cW+EHy+oy3MWCJOmGeUdIcdICilI6XB0
debug1: Will attempt key: C:\\Users\\DMAN/.ssh/id_ecdsa
debug1: Will attempt key: C:\\Users\\DMAN/.ssh/id_ecdsa_sk
debug1: Will attempt key: C:\\Users\\DMAN/.ssh/id_ed25519
debug1: Will attempt key: C:\\Users\\DMAN/.ssh/id_ed25519_sk
debug1: Will attempt key: C:\\Users\\DMAN/.ssh/id_xmss
debug1: Will attempt key: C:\\Users\\DMAN/.ssh/id_dsa
debug2: pubkey_prepare: done
debug3: send packet: type 5
debug3: receive packet: type 7
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=
debug1: kex_ext_info_check_ver: [e-mail]=<0>
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 51
debug1: Authentications that can continue: publickey,password
debug3: start over, passed a different list publickey,password
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 public key: DmaN@DESKTOP-UTS2PQ4 ED25519 SHA256:8bMNMhmS2037mx3cUf8VZxsEYLUUFmgV1zbNDi2S07Q agent
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,password
debug1: Offering public key: C:\\Users\\DMAN/.ssh/id_rsa RSA SHA256:fBMY9Urljo4cW+EHy+oy3MWCJOmGeUdIcdICilI6XB0
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,password
debug1: Trying private key: C:\\Users\\DMAN/.ssh/id_ecdsa
debug3: no such identity: C:\\Users\\DMAN/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: C:\\Users\\DMAN/.ssh/id_ecdsa_sk
debug3: no such identity: C:\\Users\\DMAN/.ssh/id_ecdsa_sk: No such file or directory
debug1: Trying private key: C:\\Users\\DMAN/.ssh/id_ed25519
debug3: no such identity: C:\\Users\\DMAN/.ssh/id_ed25519: No such file or directory
debug1: Trying private key: C:\\Users\\DMAN/.ssh/id_ed25519_sk
debug3: no such identity: C:\\Users\\DMAN/.ssh/id_ed25519_sk: No such file or directory
debug1: Trying private key: C:\\Users\\DMAN/.ssh/id_xmss
debug3: no such identity: C:\\Users\\DMAN/.ssh/id_xmss: No such file or directory
debug1: Trying private key: C:\\Users\\DMAN/.ssh/id_dsa
debug3: no such identity: C:\\Users\\DMAN/.ssh/id_dsa: 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
root@11.222.333.44's password:
debug3: send packet: type 50
debug2: we sent a password packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password
Permission denied, please try again.

[Drno]

Verriant, файл /etc/ssh/sshdconfig позволяет подключаться по паролю с рутом?

[Verriant]

Drno,
Я пытаюсь подключится из под винды. У меня нет /etc/ssh/sshdconfig. Может есть его аналог в винде но я не знаю где он.

[Verriant]

Дополнение: попробовал подключится через VNC в браузере. Виртуалка запрашивает логи и пароль, но они не подходят и в ответ пишет: "Login incorrect"

[Drno]

Verriant, я говорил про настройки виртуалки и её ssh конфиге
раз логин неподходит, очевидно что или пароль не тот или логин
разбирайтесь с ТехПО)

[Кот Абсолютный]

Захожу под рутом

Не самое умное решение. Если пароль точно верный, сбросьте через панель управления у хостера. Если в панели управления такого пункта нет - пишите в саппорт.

И сразу после восстановления доступа создайте юзера и заходите под ним, а рутовый логин запретите во избежание.

[aleks-th]

Ты до этого хоть раз под рутом входил по SSH ? С паролем ?

Если да то поздравляю, тебя сломали, сменили пароль, и сейчас через твой сервер много чего творят, за что тебя потом сажать будут...

Answer 1

[Hardoman]

Скорее всего, доступ по паролю для root запрещен (а это дефолтная конфигурация sshd).
Если вы не добавляли ключ, то подключитесь к серверу через консоль хостера по протоколу VNC и поменяйте конфиг временно
/etc/ssh/sshd_config

PermitRootLogin yes
PasswordAuthentication yes

Также удалите все дополнительные файлы в папке /etc/ssh/sshd_config.d/ (их часто добавляют хостеры при бутстрапе ноды)
Рестартаните сервис, добавьте ключ, проверьте, что вы с ним можете войти и замените обратно на

PermitRootLogin no