scp não funciona. Encontrando a causa

Question

Estou tentando copiar um arquivo (* .crt) do servidor local para o remoto. Infelizmente, não tenho direitos para abrir o arquivo sshd_config no servidor remoto. Alguém em nossa equipe configurou um agente ssh para mim; Não tenho certeza onde ele colocou esse script, mas posso me conectar a este servidor remoto sem problemas. Aqui está a saída do seguinte comando: scp -vvv /cygdrive/c/Users/myaccount/Downloads/certs/*.crt user@server:/tmp

>$ scp -vvv /cygdrive/c/Users/myaccount/Downloads/certs/*.crt user@server:/tmp
Executing: program /usr/bin/ssh host server, user user, command scp -v -d -t /tmp
OpenSSH_7.5p1, OpenSSL 1.0.2k  26 Jan 2017
debug2: resolving "server" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to server [124.67.80.20] port 22.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file /home/myaccount/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/myaccount/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/myaccount/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/myaccount/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/myaccount/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/myaccount/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/myaccount/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/myaccount/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.5
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4
debug1: match: OpenSSH_7.4 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to server:22 as 'user'
debug3: hostkeys_foreach: reading file "/home/myaccount/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/myaccount/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from server
debug3: order_hostkeyalgs: prefer hostkeyalgs: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
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,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c
debug2: host key algorithms: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected],ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],aes128-cbc,aes192-cbc,aes256-cbc
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],aes128-cbc,aes192-cbc,aes256-cbc
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-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],diffie-hellman-group-exchange-sha256,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521
debug2: host key algorithms: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256
debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr
debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr
debug2: MACs ctos: hmac-sha2-256,hmac-sha2-512
debug2: MACs stoc: hmac-sha2-256,hmac-sha2-512
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: aes128-ctr MAC: hmac-sha2-256 compression: none
debug1: kex: client->server cipher: aes128-ctr MAC: hmac-sha2-256 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:l19LX/CQNR9zxuvQpVrQn764H6u6wVxoprYFe6Z+Pf0
debug3: hostkeys_foreach: reading file "/home/myaccount/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/myaccount/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from server
debug3: hostkeys_foreach: reading file "/home/myaccount/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /home/myaccount/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from 172.27.40.30
debug1: Host 'server' is known and matches the ECDSA host key.
debug1: Found key in /home/myaccount/.ssh/known_hosts:1
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey after 4294967296 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug1: SSH2_MSG_NEWKEYS received
debug2: set_newkeys: mode 0
debug1: rekey after 4294967296 blocks
debug2: key: /home/myaccount/.ssh/id_rsa (0x600072020), agent
debug2: key: /home/myaccount/.ssh/id_rsa (0x0)
debug2: key: /home/myaccount/.ssh/id_dsa (0x0)
debug2: key: /home/myaccount/.ssh/id_ecdsa (0x0)
debug2: key: /home/myaccount/.ssh/id_ed25519 (0x0)
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 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/myaccount/.ssh/id_rsa
debug3: send_pubkey_test
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 60
debug1: Server accepts key: pkalg rsa-sha2-512 blen 279
debug2: input_userauth_pk_ok: fp SHA256:0Ye9/EO8URVsdDLmSgDFlACsxRCJVSTtTmwNYr8SpZE
debug3: sign_and_send_pubkey: RSA SHA256:0Ye9/EO8URVsdDLmSgDFlACsxRCJVSTtTmwNYr8SpZE
debug3: send packet: type 50
debug3: receive packet: type 52
debug1: Authentication succeeded (publickey).
Authenticated to server([124.67.80.20]:22).
debug2: fd 5 setting O_NONBLOCK
debug2: fd 6 setting O_NONBLOCK
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug3: send packet: type 90
debug1: Requesting [email protected]
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: network
debug3: receive packet: type 80
debug1: client_input_global_request: rtype [email protected] want_reply 0
debug3: receive packet: type 91
debug2: callback start
debug2: fd 3 setting TCP_NODELAY
debug3: ssh_packet_set_tos: set IP_TOS 0x08
debug2: client_session2_setup: id 0
debug1: Sending command: scp -v -d -t /tmp
debug2: channel 0: request exec confirm 1
debug3: send packet: type 98
debug2: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug2: channel 0: rcvd adjust 2097152
debug3: receive packet: type 99
debug2: channel_input_status_confirm: type 99 id 0
debug2: exec request accepted on channel 0
debug3: send packet: type 1
debug1: channel 0: free: client-session, nchannels 1
debug3: channel 0: status: The following connections are open:

^ aqui tudo trava e depois de alguns minutos, eu clico em Ctrl + C então vem isso:

  #0 client-session (t4 r0 i0/0 o0/0 fd 5/6 cc -1)

debug3: fd 0 is not O_NONBLOCK
debug3: fd 1 is not O_NONBLOCK
Killed by signal 2.

Onde está o problema?

@roaima Aqui está o resultado de ls -ld :

╔═myaccount ▷ w00d76:[~]:
╚> ls -ld /cygdrive/c/Users/myaccount /Downloads/certs/*.crt
-rwx------+ 1 myaccount Domain Users 5037 17. Apr 12:40 /cygdrive/c/Users/myaccount/Downloads/certs/dm.cogist.com_server.crt
-rwx------+ 1 myaccount Domain Users 5033 17. Apr 12:37 /cygdrive/c/Users/myaccount/Downloads/certs/dm1.cogist.ch_server.crt
-rwx------+ 1 myaccount Domain Users 5037 17. Apr 12:41 /cygdrive/c/Users/myaccount/Downloads/certs/dm2.cogist.ch_server.crt
-rwx------+ 1 myaccount Domain Users 5041 17. Apr 12:38 /cygdrive/c/Users/myaccount/Downloads/certs/dm1.cogist.com_server.crt
-rwx------+ 1 myaccount Domain Users 5053 17. Apr 12:35 /cygdrive/c/Users/myaccount/Downloads/certs/dm3.cogist.ch_server.crt
-rwx------+ 1 myaccount Domain Users 5069 17. Apr 12:36 /cygdrive/c/Users/myaccount/Downloads/certs/dm3.cogist.com_server.crt
-rwx------+ 1 myaccount Domain Users 5025 17. Apr 12:30 /cygdrive/c/Users/myaccount/Downloads/certs/dm4.cogist.ch_server.crt
-rwx------+ 1 myaccount Domain Users 5025 17. Apr 12:35 /cygdrive/c/Users/myaccount/Downloads/certs/dm5.cogist.ch_server.crt
-rwx------+ 1 myaccount Domain Users 5021 17. Apr 12:33 /cygdrive/c/Users/myaccount/Downloads/certs/dm6.cogist.ch_server.crt
-rwx------+ 1 myaccount Domain Users 5029 17. Apr 12:39 /cygdrive/c/Users/myaccount/Downloads/certs/dm7.cogist.ch_server.crt
-rwx------+ 1 myaccount Domain Users 5025 17. Apr 12:40 /cygdrive/c/Users/myaccount/Downloads/certs/dm8.cogist.ch_server.crt
-rwx------+ 1 myaccount Domain Users 5029 17. Apr 12:32 /cygdrive/c/Users/myaccount/Downloads/certs/dm9.cogist.ch_server.crt

@roaima Estou logado usando ssh myaccount @ server e aqui não há dúvidas.

╔═myaccount ▷ w00d76:[~]:
╚> ssh myaccount@server
Last login: Wed Apr 18 11:38:30 2018 from w00d76.net.ch

      server.net.ch

      Inventory number: 25422250
      OS responsible:   IT245
      APPL responsible: IT245
      APPL description: Gateway Server
      Server function:  Produktion

      Red Hat Enterprise Linux Server release 7.4 (Maipo) (x86_64)

      IT2 Operations [email protected]

      "akunamatata -> no worries mate .."


╔═myaccount ▷ server:[~]:
╚>

    

Answer 1

debug1: Sending command: scp -v -d -t /tmp
[...]
debug2: exec request accepted on channel 0

O SCP funciona abrindo uma conexão SSH com o servidor remoto, depois invocando outra cópia do programa scp. As duas instâncias scp se comunicam entre si por meio do link SSH.

De acordo com o log, seu cliente scp foi conectado com êxito ao servidor, autenticado e solicitado para o servidor remoto invocar scp para receber os arquivos. No entanto, parece que a instância scp remota não foi realmente inicializada corretamente. Uma dessas razões parece ser provável:

1. Você tem algo em seu arquivo .bashrc, .profile ou semelhante no sistema remoto que impediu que o scp fosse iniciado. O servidor remoto chama os comandos solicitados usando seu shell de login executando o equivalente a $SHELL -c 'the-requested-command' . Algumas coisas que você pode colocar em seus arquivos de configuração do shell impedem que o shell execute o comando. Por exemplo, se o seu .bashrc executasse um shell diferente, isso impediria que o scp funcionasse.

2. Como você autenticou usando uma chave SSH, provavelmente você tem uma entrada para a chave SSH no arquivo .ssh/authorized_keys do sistema remoto. Existe uma diretiva chamada ForceCommand que pode ser colocada no arquivo authorized_keys. Se a chave estiver sujeita a um comando forçado, qualquer solicitação do cliente para executar um programa invocará o comando forçado, em vez do comando solicitado pelo cliente.

3. O programa scp no sistema remoto pode estar com defeito. Ou talvez alguém o tenha substituído por um programa diferente.

Answer 2

Parece que seu servidor remoto está configurado para fazer uma pergunta quando você faz login. (Você pode verificar isso com ssh user@server e ver se você fez uma pergunta.) Esse código precisa ser modificado para fazer apenas a sua pergunta ao executar em um shell interativo.

Por exemplo, se você estiver usando bash , em .bashrc :

read -p "What terminal type: " termtype
# ... other code that uses $termtype ...

você deve considerar algo assim:

if [[ -n "$PS1" ]]
then
    read -p "What terminal type: " termtype
    # ... other code that uses $termtype ...
fi