Dotaz: Chyba v protokolu SSH: Message authentication failed.

[Beda0]

Zdravím, mám arm mikropočítač s veřejnou IP přístupné přes IP nebo doménu 4. řádu. Připojuju se k němu z domu z poza NATu po SSH. V sshd mám zakázané přihlašování pomocí hesla, přihlašuju se pomocí certifikátů. Mám tam dva - jeden z heslem, který používám univerzálně i na dalších zařízeních, a jeden bez hesla jen pro tohle zařízení. Z konzole se bez problémů přihlásím s oběma certifikáty ssh i sshfs.

Poblém je při použití v QtCreator - na zařízení pouštím vzdálený debugging pomocí gdb. Přidám zařízení do QtCreatoru (a nastavím certifikát bez hesla, protože s heslem to neumí) a spojení občas funguje, občas ne - Chyba při vytváření spojení SSH: Chyba v protokolu SSH: Message authentication failed. Občas pomůže měnit ip na doménu nebo obrácené, odpojit se z konzole ssh i sshfs, smazat .ssh/known_hosts, občas to samo zafunguje po x pokusech, občas to prostě ne a ne naskočit. Nevím jak dostat z QtCreatoru víc informací o chybě - do konzole nic nevypíše, na serveru je v logu tohle: (LogLevel VERBOSE)

Mar  1 15:07:06 arm sshd[5400]: Connection from 217.29.7.25 port 45657 on IPSERVERU port 22
Mar  1 15:07:06 arm sshd[5400]: Accepted publickey for XXX from 217.29.7.25 port 45657 ssh2: RSA SHA256:XXX
Mar  1 15:07:06 arm sshd[5400]: pam_unix(sshd:session): session opened for user XXX by (uid=0)
Mar  1 15:07:06 arm sshd[5400]: User child is on pid 5409
Mar  1 15:07:06 arm sshd[5409]: error: Received disconnect from 217.29.7.25 port 45657:5: Message authentication failed.
Mar  1 15:07:06 arm sshd[5409]: Disconnected from 217.29.7.25 port 45657
Mar  1 15:07:06 arm sshd[5400]: pam_unix(sshd:session): session closed for user XXX

Na armu Ubuntu 16.04.2 LTS (GNU/Linux 4.4.46-armv7-rt-x13 armv7l), u sebe Arch.

Co může být špatně?

Odpovědi

[Petr Šobáň]

Proč tam máte dva certifikáty?

Je to přece zbytečné na jedno spojení mít dva certifikáty.

Podle mě to hodí chybu nebo ne podle toho který certifikát to vybere.

[Beda0]

Mám jeden univerzální, kterym se přihlašuju na většině svých zařízení - ten je na heslo. Protože QtCreator zvládá ssh jen s plain heslem nebo certifikátem bez hesla, tak sem si vytvořil speciálně certifikát bez hesla pro tohle použití. Do QtCreatoru se zadává přímo soubor s private key. Kde by mělo dojít k chybě výběru certifikátu? Když se z konzole přez ssh připojuju s druhým certifikátem bez hesla: ssh -i/klíč - není problém.

Je normální mit na serveru několik public klíčů - pro X lidí, který se tam budou přihlašovat nebo ne?

[Petr Šobáň]

Jasně na serveru mám public klíče od různých uživatelů.

A já žádný nevybírám se vybere automaticky.

Právě pokud máš dva stejné tak podle mě neví oproti kterému to ověřit.

[Beda0]

Jak stejné? Každý je jiný - jeden s heslem, druhý bez hesla. Jeden je ecdsa, druhý rsa... ale o to nejde... Pokud je u klienta v ~/.ssh/ víc certifikátů a já nespecifikuju který chci, nemám .ssh/config který by specifikoval který použít pro který server, tak by měl klient vybrat první... i kdyby se vybral náhodně - tak ho vybere už klient - pošle požadavek "jmenuju se franta a mam takovejhle veřejnej klíč" a podepíše to soukromým (případně se zeptá na heslo). Server zkontroluje jestli podpis sedí proti veřejnýmu klíči a pak zkontroluje, jesli je v authorized_keys - takhle chápu přihlašování klíčema a nevidím v tom místo, kde by mělo dojít ke zmatení který klíč ověřit proti kterému (v mojí situaci, kdy mam u klienta dva klíče a jejich public části sou obě na serveru).

[lertimir]

Začal bych log levelem DEBUG na nejakém vyšším levelu. Z prvního pohledu to vypadá, že to zařízne klient.

[Beda0]

Podle tohodle logu vypadá všechno na straně serveru úplně OK a na konci to zařízne klient protože "Message authentication failed." Takže to vypadá na nějakej problém v QtCreator, ale z toho se mi žádnej log dostat nepodařilo - do konzele vypíše jen XmbTextListToTextProperty result code -2

LogLevel DEBUG3

Mar  1 16:28:56 arm sshd[6020]: debug3: fd 5 is not O_NONBLOCK
Mar  1 16:28:56 arm sshd[6020]: debug1: Forked child 6055.
Mar  1 16:28:56 arm sshd[6055]: debug3: oom_adjust_restore
Mar  1 16:28:56 arm sshd[6020]: debug3: send_rexec_state: entering fd = 9 config len 787
Mar  1 16:28:56 arm sshd[6055]: debug1: Set /proc/self/oom_score_adj to 0
Mar  1 16:28:56 arm sshd[6055]: debug1: rexec start in 5 out 5 newsock 5 pipe 8 sock 9
Mar  1 16:28:56 arm sshd[6020]: debug3: ssh_msg_send: type 0
Mar  1 16:28:56 arm sshd[6020]: debug3: send_rexec_state: done
Mar  1 16:28:56 arm sshd[6055]: debug1: inetd sockets after dupping: 3, 3
Mar  1 16:28:56 arm sshd[6055]: Connection from 217.29.7.25 port 48397 on IPSERVERU port 22
Mar  1 16:28:56 arm sshd[6055]: debug1: Client protocol version 2.0; client software version QtCreator
Mar  1 16:28:56 arm sshd[6055]: debug1: no match: QtCreator
Mar  1 16:28:56 arm sshd[6055]: debug1: Enabling compatibility mode for protocol 2.0
Mar  1 16:28:56 arm sshd[6055]: debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.1
Mar  1 16:28:56 arm sshd[6055]: debug2: fd 3 setting O_NONBLOCK
Mar  1 16:28:56 arm sshd[6055]: debug2: Network child is on pid 6056
Mar  1 16:28:56 arm sshd[6055]: debug3: preauth child monitor started
Mar  1 16:28:56 arm sshd[6055]: debug3: privsep user:group 107:65534 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug1: permanently_set_uid: 107/65534 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: list_hostkey_types: ssh-dss key not permitted by HostkeyAlgorithms [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug1: list_hostkey_types: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: send packet: type 20 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug1: SSH2_MSG_KEXINIT sent [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: receive packet: type 20 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug1: SSH2_MSG_KEXINIT received [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: local server KEXINIT proposal [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: KEX algorithms: curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: host key algorithms: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: compression ctos: none,zlib@openssh.com [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: compression stoc: none,zlib@openssh.com [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: languages ctos:  [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: languages stoc:  [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: first_kex_follows 0  [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: reserved 0  [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: peer client KEXINIT proposal [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: KEX algorithms: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group1-sha1,diffie-hellman-group14-sha1 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: host key algorithms: ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa,ssh-dss [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: ciphers ctos: aes256-ctr,aes192-ctr,aes128-ctr,3des-ctr,aes128-cbc,3des-cbc [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: ciphers stoc: aes256-ctr,aes192-ctr,aes128-ctr,3des-ctr,aes128-cbc,3des-cbc [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: MACs ctos: hmac-sha2-256,hmac-sha2-384,hmac-sha2-512,hmac-sha1 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: MACs stoc: hmac-sha2-256,hmac-sha2-384,hmac-sha2-512,hmac-sha1 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: compression ctos: none [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: compression stoc: none [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: languages ctos:  [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: languages stoc:  [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: first_kex_follows 0  [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: reserved 0  [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug1: kex: algorithm: ecdh-sha2-nistp256 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug1: kex: host key algorithm: ecdsa-sha2-nistp256 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug1: kex: client->server cipher: aes256-ctr MAC: hmac-sha2-256 compression: none [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug1: kex: server->client cipher: aes256-ctr MAC: hmac-sha2-256 compression: none [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: receive packet: type 30 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_key_sign entering [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_send entering: type 6 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_receive entering
Mar  1 16:28:56 arm sshd[6055]: debug3: monitor_read: checking request 6
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_answer_sign
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_answer_sign: hostkey proof signature 0x810da1b0(100)
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_send entering: type 7
Mar  1 16:28:56 arm sshd[6055]: debug2: monitor_read: 6 used once, disabling now
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_key_sign: waiting for MONITOR_ANS_SIGN [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_receive_expect entering: type 7 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_receive entering [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: send packet: type 31 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: send packet: type 21 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: set_newkeys: mode 1 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug1: rekey after 4294967296 blocks [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug1: SSH2_MSG_NEWKEYS sent [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug1: expecting SSH2_MSG_NEWKEYS [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: receive packet: type 21 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: set_newkeys: mode 0 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug1: rekey after 4294967296 blocks [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug1: SSH2_MSG_NEWKEYS received [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug1: KEX done [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: receive packet: type 5 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: send packet: type 6 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: receive packet: type 50 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug1: userauth-request for user XXX service ssh-connection method publickey [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug1: attempt 0 failures 0 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_getpwnamallow entering [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_send entering: type 8 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_getpwnamallow: waiting for MONITOR_ANS_PWNAM [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_receive_expect entering: type 9 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_receive entering [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_receive entering
Mar  1 16:28:56 arm sshd[6055]: debug3: monitor_read: checking request 8
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_answer_pwnamallow
Mar  1 16:28:56 arm sshd[6055]: debug2: parse_server_config: config reprocess config len 787
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_answer_pwnamallow: sending MONITOR_ANS_PWNAM: 1
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_send entering: type 9
Mar  1 16:28:56 arm sshd[6055]: debug2: monitor_read: 8 used once, disabling now
Mar  1 16:28:56 arm sshd[6055]: debug2: input_userauth_request: setting up authctxt for XXX [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_start_pam entering [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_send entering: type 100 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_inform_authserv entering [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_send entering: type 4 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug2: input_userauth_request: try method publickey [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: userauth_pubkey: have signature for RSA SHA256:XXX [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_key_allowed entering [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_send entering: type 22 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_key_allowed: waiting for MONITOR_ANS_KEYALLOWED [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_receive_expect entering: type 23 [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_receive entering [preauth]
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_receive entering
Mar  1 16:28:56 arm sshd[6055]: debug3: monitor_read: checking request 100
Mar  1 16:28:56 arm sshd[6055]: debug1: PAM: initializing for "XXX"
Mar  1 16:28:56 arm sshd[6055]: debug1: PAM: setting PAM_RHOST to "217.29.7.25"
Mar  1 16:28:56 arm sshd[6055]: debug1: PAM: setting PAM_TTY to "ssh"
Mar  1 16:28:56 arm sshd[6055]: debug2: monitor_read: 100 used once, disabling now
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_receive entering
Mar  1 16:28:56 arm sshd[6055]: debug3: monitor_read: checking request 4
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_answer_authserv: service=ssh-connection, style=, role=
Mar  1 16:28:56 arm sshd[6055]: debug2: monitor_read: 4 used once, disabling now
Mar  1 16:28:56 arm sshd[6055]: debug3: mm_request_receive entering
Mar  1 16:28:57 arm sshd[6055]: debug3: monitor_read: checking request 22
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_answer_keyallowed entering
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_answer_keyallowed: key_from_blob: 0x810d9d48
Mar  1 16:28:57 arm sshd[6055]: debug1: temporarily_use_uid: 1000/1000 (e=0/0)
Mar  1 16:28:57 arm sshd[6055]: debug1: trying public key file /home/XXX/.ssh/authorized_keys
Mar  1 16:28:57 arm sshd[6055]: debug1: fd 4 clearing O_NONBLOCK
Mar  1 16:28:57 arm sshd[6055]: debug2: user_key_allowed: check options: 'KLÍČ S HESLEM'
Mar  1 16:28:57 arm sshd[6055]: debug2: user_key_allowed: advance: 'KLÍČ BEZ HESLA - TIM SE SNAŽIM PŘIPOJIT'
Mar  1 16:28:57 arm sshd[6055]: debug1: matching key found: file /home/XXX/.ssh/authorized_keys, line 2 RSA SHA256:XXX
Mar  1 16:28:57 arm sshd[6055]: debug1: restore_uid: 0/0
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_answer_keyallowed: key 0x810d9d48 is allowed
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_request_send entering: type 23
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_key_verify entering [preauth]
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_request_send entering: type 24 [preauth]
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_key_verify: waiting for MONITOR_ANS_KEYVERIFY [preauth]
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_request_receive_expect entering: type 25 [preauth]
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_request_receive entering [preauth]
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_request_receive entering
Mar  1 16:28:57 arm sshd[6055]: debug3: monitor_read: checking request 24
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_answer_keyverify: key 0x810daf30 signature verified
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_request_send entering: type 25
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_request_receive_expect entering: type 102
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_request_receive entering
Mar  1 16:28:57 arm sshd[6055]: debug1: do_pam_account: called
Mar  1 16:28:57 arm sshd[6055]: debug3: PAM: do_pam_account pam_acct_mgmt = 0 (Success)
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_request_send entering: type 103
Mar  1 16:28:57 arm sshd[6055]: Accepted publickey for XXX from 217.29.7.25 port 48397 ssh2: RSA SHA256:XXX
Mar  1 16:28:57 arm sshd[6055]: debug1: monitor_child_preauth: XXX has been authenticated by privileged process
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_get_keystate: Waiting for new keys
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_request_receive_expect entering: type 26
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_request_receive entering
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_get_keystate: GOT new keys
Mar  1 16:28:57 arm sshd[6055]: debug2: userauth_pubkey: authenticated 1 pkalg ssh-rsa [preauth]
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_do_pam_account entering [preauth]
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_request_send entering: type 102 [preauth]
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_request_receive_expect entering: type 103 [preauth]
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_request_receive entering [preauth]
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_do_pam_account returning 1 [preauth]
Mar  1 16:28:57 arm sshd[6055]: debug3: send packet: type 52 [preauth]
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_request_send entering: type 26 [preauth]
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_send_keystate: Finished sending state [preauth]
Mar  1 16:28:57 arm sshd[6055]: debug1: monitor_read_log: child log fd closed
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_share_sync: Share sync
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_share_sync: Share sync end
Mar  1 16:28:57 arm sshd[6055]: debug1: PAM: establishing credentials
Mar  1 16:28:57 arm sshd[6055]: debug3: PAM: opening session
Mar  1 16:28:57 arm sshd[6055]: pam_unix(sshd:session): session opened for user XXX by (uid=0)
Mar  1 16:28:57 arm sshd[6055]: debug3: PAM: sshpam_store_conv called with 1 messages
Mar  1 16:28:57 arm sshd[6055]: User child is on pid 6064
Mar  1 16:28:57 arm sshd[6064]: debug1: SELinux support disabled
Mar  1 16:28:57 arm sshd[6064]: debug1: PAM: establishing credentials
Mar  1 16:28:57 arm sshd[6064]: debug1: permanently_set_uid: 1000/1000
Mar  1 16:28:57 arm sshd[6064]: debug3: monitor_apply_keystate: packet_set_state
Mar  1 16:28:57 arm sshd[6064]: debug2: set_newkeys: mode 0
Mar  1 16:28:57 arm sshd[6064]: debug1: rekey after 4294967296 blocks
Mar  1 16:28:57 arm sshd[6064]: debug2: set_newkeys: mode 1
Mar  1 16:28:57 arm sshd[6064]: debug1: rekey after 4294967296 blocks
Mar  1 16:28:57 arm sshd[6064]: debug1: ssh_packet_set_postauth: called
Mar  1 16:28:57 arm sshd[6064]: debug3: ssh_packet_set_state: done
Mar  1 16:28:57 arm sshd[6064]: debug3: notify_hostkeys: key 0: ssh-rsa SHA256:XXX
Mar  1 16:28:57 arm sshd[6064]: debug3: notify_hostkeys: key 1: ssh-dss SHA256:XXX
Mar  1 16:28:57 arm sshd[6064]: debug3: notify_hostkeys: key 2: ecdsa-sha2-nistp256 SHA256:XXX
Mar  1 16:28:57 arm sshd[6064]: debug3: notify_hostkeys: key 3: ssh-ed25519 SHA256:XXX
Mar  1 16:28:57 arm sshd[6064]: debug3: notify_hostkeys: sent 4 hostkeys
Mar  1 16:28:57 arm sshd[6064]: debug3: send packet: type 80
Mar  1 16:28:57 arm sshd[6064]: debug1: Entering interactive session for SSH2.
Mar  1 16:28:57 arm sshd[6064]: debug2: fd 5 setting O_NONBLOCK
Mar  1 16:28:57 arm sshd[6064]: debug2: fd 6 setting O_NONBLOCK
Mar  1 16:28:57 arm sshd[6064]: debug1: server_init_dispatch_20
Mar  1 16:28:57 arm sshd[6064]: debug3: receive packet: type 90
Mar  1 16:28:57 arm sshd[6064]: debug1: server_input_channel_open: ctype session rchan 0 win 16777216 max 16777216
Mar  1 16:28:57 arm sshd[6064]: debug1: input_session_request
Mar  1 16:28:57 arm sshd[6064]: debug1: channel 0: new [server-session]
Mar  1 16:28:57 arm sshd[6064]: debug2: session_new: allocate (allocated 0 max 10)
Mar  1 16:28:57 arm sshd[6064]: debug3: session_unused: session id 0 unused
Mar  1 16:28:57 arm sshd[6064]: debug1: session_new: session 0
Mar  1 16:28:57 arm sshd[6064]: debug1: session_open: channel 0
Mar  1 16:28:57 arm sshd[6064]: debug1: session_open: session 0: link with channel 0
Mar  1 16:28:57 arm sshd[6064]: debug1: server_input_channel_open: confirm session
Mar  1 16:28:57 arm sshd[6064]: debug3: send packet: type 91
Mar  1 16:28:57 arm sshd[6064]: debug3: receive packet: type 1
Mar  1 16:28:57 arm sshd[6064]: error: Received disconnect from 217.29.7.25 port 48397:5: Message authentication failed.
Mar  1 16:28:57 arm sshd[6064]: Disconnected from 217.29.7.25 port 48397
Mar  1 16:28:57 arm sshd[6064]: debug1: do_cleanup
Mar  1 16:28:57 arm sshd[6064]: debug3: PAM: sshpam_thread_cleanup entering
Mar  1 16:28:57 arm sshd[6055]: debug3: mm_request_receive entering
Mar  1 16:28:57 arm sshd[6055]: debug1: do_cleanup
Mar  1 16:28:57 arm sshd[6055]: debug1: PAM: cleanup
Mar  1 16:28:57 arm sshd[6055]: debug1: PAM: closing session
Mar  1 16:28:57 arm sshd[6055]: pam_unix(sshd:session): session closed for user XXX
Mar  1 16:28:57 arm sshd[6055]: debug1: PAM: deleting credentials
Mar  1 16:28:57 arm sshd[6055]: debug3: PAM: sshpam_thread_cleanup entering
Mar  1 16:28:57 arm sshd[6055]: debug1: audit_event: unhandled event 12

[lertimir]

Myslím si že nejdříve je potřeba přesně zdiagnostikovat, co se stalo. Takže to jistě blokne klient. Ještě bych zkusil zapnout qtcreator do debug modu. A zkusit odchytit wiresharkem/tcpdump, co se děje na rozhraní na ssh protokolu na klientu.

[Beda0]

Tím se akorát nastaví kompilace projektu s debug informacema... na problémy v samotnym QtCreatoru nemá vliv. Pokusím se z toho dostat víc, až budu fyzicky u toho ARMu.