Estou meio preso aqui ...
Estou tentando desativar todos os recursos de login SSH do root. Nenhum login de senha. Nenhum login baseado em chave. Nada. Eu tenho um usuário "andrew" que só deve ser capaz de SSH no meu servidor com a chave privada.
Veja o que eu fiz até agora:
(on my laptop) ssh-keygen -b 4096 -t rsa
(on my laptop) cat id_rsa.pub | ssh [email protected] "cat >> /home/andrew/.ssh/authorized_keys"
(on my server) Modified /etc/ssh/sshd_config in the following ways:
- PermitRootLogin no
- PasswordAuthentication no
- AuthorizedKeysFile /home/%h/.ssh/authorized_keys
(on my server) reload ssh
Quando tento conectar-me ao meu servidor do meu laptop, recebo o seguinte (os erros estão no final):
andrew@andrew-asus ~/.ssh $ ssh -vvv -i id_rsa [email protected]
OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to server.com [XXXXXXXXX] port 22.
debug1: Connection established.
debug3: Incorrect RSA1 identifier
debug3: Could not load "id_rsa" as a RSA1 public key
debug1: identity file id_rsa type 1
debug1: identity file id_rsa-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2
debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2 pat OpenSSH_6.6.1* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug3: load_hostkeys: loading entries for host "server.com" from file "/home/andrew/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file /home/andrew/.ssh/known_hosts:2
debug3: load_hostkeys: loaded 1 keys
debug3: order_hostkeyalgs: prefer hostkeyalgs: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: [email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected],[email protected],[email protected],[email protected],ssh-ed25519,ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[email protected],[email protected],[email protected],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[email protected],[email protected],[email protected],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-sha1,[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-sha1,[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[email protected],zlib
debug2: kex_parse_kexinit: none,[email protected],zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit: [email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ssh-ed25519
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[email protected],[email protected],[email protected],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[email protected],[email protected],[email protected],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-sha1,[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-sha1,[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[email protected]
debug2: kex_parse_kexinit: none,[email protected]
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_setup: setup [email protected]
debug1: kex: server->client aes128-ctr [email protected] none
debug2: mac_setup: setup [email protected]
debug1: kex: client->server aes128-ctr [email protected] none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA 50:4a:6c:d9:62:82:c6:59:32:55:b9:43:09:8d:7b:07
debug3: load_hostkeys: loading entries for host "server.com" from file "/home/andrew/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file /home/andrew/.ssh/known_hosts:2
debug3: load_hostkeys: loaded 1 keys
debug3: load_hostkeys: loading entries for host "XXXXXXXX" from file "/home/andrew/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file /home/andrew/.ssh/known_hosts:3
debug3: load_hostkeys: loaded 1 keys
debug1: Host 'server.com' is known and matches the ECDSA host key.
debug1: Found key in /home/andrew/.ssh/known_hosts:2
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: id_rsa (0x7f7c55f5cda0), explicit
debug2: key: andrew@andrew-asus (0x7f7c55f61950),
debug1: Authentications that can continue: publickey
debug3: start over, passed a different list publickey
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: id_rsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Authentications that can continue: publickey
debug1: Offering RSA public key: andrew@andrew-asus
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Authentications that can continue: publickey
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
Permission denied (publickey).
Aqui está o comando que eu corro no meu computador para conectar:
(inside the ~/.ssh dir) ssh -vvv -i id_rsa [email protected]
Eu tentei usar o ssh-copy-id. Eu tentei recriar meu par de chaves. Excluindo as entradas "authorized_keys" no servidor. Excluindo as entradas "known_hosts" no laptop. Estou perdido.
Aqui está uma cópia completa do arquivo sshd_config no servidor:
# Package generated configuration file
# See the sshd_config(5) manpage for details
# What ports, IPs and protocols we listen for
Port 22
# Use these options to restrict which interfaces/protocols sshd will bind to
#ListenAddress ::
#ListenAddress 0.0.0.0
Protocol 2
# HostKeys for protocol version 2
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_dsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
HostKey /etc/ssh/ssh_host_ed25519_key
#Privilege Separation is turned on for security
UsePrivilegeSeparation yes
# Lifetime and size of ephemeral version 1 server key
KeyRegenerationInterval 3600
ServerKeyBits 1024
# Logging
SyslogFacility AUTH
LogLevel INFO
# Authentication:
LoginGraceTime 120
PermitRootLogin no
StrictModes yes
RSAAuthentication yes
PubkeyAuthentication yes
AuthorizedKeysFile /home/%h/.ssh/authorized_keys
# Don't read the user's ~/.rhosts and ~/.shosts files
IgnoreRhosts yes
# For this to work you will also need host keys in /etc/ssh_known_hosts
RhostsRSAAuthentication no
# similar for protocol version 2
HostbasedAuthentication no
# Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication
#IgnoreUserKnownHosts yes
# To enable empty passwords, change to yes (NOT RECOMMENDED)
PermitEmptyPasswords no
# Change to yes to enable challenge-response passwords (beware issues with
# some PAM modules and threads)
ChallengeResponseAuthentication no
# Change to no to disable tunnelled clear text passwords
PasswordAuthentication no
# Kerberos options
#KerberosAuthentication no
#KerberosGetAFSToken no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes
X11Forwarding yes
X11DisplayOffset 10
PrintMotd no
PrintLastLog yes
TCPKeepAlive yes
#UseLogin no
#MaxStartups 10:30:60
#Banner /etc/issue.net
# Allow client to pass locale environment variables
AcceptEnv LANG LC_*
Subsystem sftp /usr/lib/openssh/sftp-server
# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the ChallengeResponseAuthentication and
# PasswordAuthentication. Depending on your PAM configuration,
# PAM authentication via ChallengeResponseAuthentication may bypass
# the setting of "PermitRootLogin without-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and ChallengeResponseAuthentication to 'no'.
UsePAM yes
Obrigado a qualquer um que possa me ajudar.
EDIT: Aqui está a saída do meu arquivo auth.log quando o sshd está em execução no modo de loggin DEBUG. Parece que não é possível encontrar o arquivo "authorized_keys".
May 21 22:29:47 server sshd[13613]: debug1: Bind to port 22 on 0.0.0.0.
May 21 22:29:47 server sshd[13613]: Server listening on 0.0.0.0 port 22.
May 21 22:29:47 server sshd[13613]: debug1: Bind to port 22 on ::.
May 21 22:29:47 server sshd[13613]: Server listening on :: port 22.
May 21 22:29:50 server sshd[13613]: debug1: Forked child 13615.
May 21 22:29:50 server sshd[13615]: Set /proc/self/oom_score_adj to 0
May 21 22:29:50 server sshd[13615]: debug1: rexec start in 5 out 5 newsock 5 pipe 7 sock 8
May 21 22:29:50 server sshd[13615]: debug1: inetd sockets after dupping: 3, 3
May 21 22:29:50 server sshd[13615]: Connection from XXXXXXXXXX port 4446 on XXXXXXXX port 22
May 21 22:29:50 server sshd[13615]: debug1: Client protocol version 2.0; client software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2
May 21 22:29:50 server sshd[13615]: debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2 pat OpenSSH_6.6.1* compat 0x04000000
May 21 22:29:50 server sshd[13615]: debug1: Enabling compatibility mode for protocol 2.0
May 21 22:29:50 server sshd[13615]: debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2
May 21 22:29:50 server sshd[13615]: debug1: permanently_set_uid: 104/65534 [preauth]
May 21 22:29:50 server sshd[13615]: debug1: list_hostkey_types: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
May 21 22:29:50 server sshd[13615]: debug1: SSH2_MSG_KEXINIT sent [preauth]
May 21 22:29:50 server sshd[13615]: debug1: SSH2_MSG_KEXINIT received [preauth]
May 21 22:29:50 server sshd[13615]: debug1: kex: client->server aes128-ctr [email protected] none [preauth]
May 21 22:29:50 server sshd[13615]: debug1: kex: server->client aes128-ctr [email protected] none [preauth]
May 21 22:29:50 server sshd[13615]: debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth]
May 21 22:29:50 server sshd[13615]: debug1: SSH2_MSG_NEWKEYS sent [preauth]
May 21 22:29:50 server sshd[13615]: debug1: expecting SSH2_MSG_NEWKEYS [preauth]
May 21 22:29:50 server sshd[13615]: debug1: SSH2_MSG_NEWKEYS received [preauth]
May 21 22:29:50 server sshd[13615]: debug1: KEX done [preauth]
May 21 22:29:51 server sshd[13615]: debug1: userauth-request for user andrew service ssh-connection method none [preauth]
May 21 22:29:51 server sshd[13615]: debug1: attempt 0 failures 0 [preauth]
May 21 22:29:51 server sshd[13615]: debug1: PAM: initializing for "andrew"
May 21 22:29:51 server sshd[13615]: debug1: PAM: setting PAM_RHOST to "XXXXXXXXXX"
May 21 22:29:51 server sshd[13615]: debug1: PAM: setting PAM_TTY to "ssh"
May 21 22:29:51 server sshd[13615]: debug1: userauth-request for user andrew service ssh-connection method publickey [preauth]
May 21 22:29:51 server sshd[13615]: debug1: attempt 1 failures 0 [preauth]
May 21 22:29:51 server sshd[13615]: debug1: test whether pkalg/pkblob are acceptable [preauth]
May 21 22:29:51 server sshd[13615]: debug1: temporarily_use_uid: 1000/1000 (e=0/0)
May 21 22:29:51 server sshd[13615]: debug1: trying public key file /home//home/andrew/.ssh/authorized_keys
May 21 22:29:51 server sshd[13615]: debug1: Could not open authorized keys '/home//home/andrew/.ssh/authorized_keys': No such file or directory
May 21 22:29:51 server sshd[13615]: debug1: restore_uid: 0/0
May 21 22:29:51 server sshd[13615]: Failed publickey for andrew from XXXXXXXXX port 4446 ssh2: RSA 33:63:b9:9d:a2:19:b4:24:9b:88:31:6b:b4:9f:15:f5
May 21 22:29:54 server sshd[13615]: debug1: userauth-request for user andrew service ssh-connection method publickey [preauth]
May 21 22:29:54 server sshd[13615]: debug1: attempt 2 failures 1 [preauth]
May 21 22:29:54 server sshd[13615]: debug1: temporarily_use_uid: 1000/1000 (e=0/0)
May 21 22:29:54 server sshd[13615]: debug1: trying public key file /home//home/andrew/.ssh/authorized_keys
May 21 22:29:54 server sshd[13615]: debug1: Could not open authorized keys '/home//home/andrew/.ssh/authorized_keys': No such file or directory
May 21 22:29:54 server sshd[13615]: debug1: restore_uid: 0/0
May 21 22:29:54 server sshd[13615]: Failed publickey for andrew from XXXXXXXX port 4446 ssh2: RSA 33:63:b9:9d:a2:19:b4:24:9b:88:31:6b:b4:9f:15:f5
May 21 22:29:54 server sshd[13615]: Connection closed by XXXXXXXXX [preauth]
May 21 22:29:54 server sshd[13615]: debug1: do_cleanup [preauth]
May 21 22:29:54 server sshd[13615]: debug1: monitor_read_log: child log fd closed
May 21 22:29:54 server sshd[13615]: debug1: do_cleanup
May 21 22:29:54 server sshd[13615]: debug1: PAM: cleanup
May 21 22:29:54 server sshd[13615]: debug1: Killing privsep child 13616
May 21 22:30:01 server sshd[13613]: Received signal 15; terminating.
EDIT # 2: Parece algo com permissões no arquivo "authorized_keys". O sshd pode encontrá-lo agora, mas não pode abri-lo. Aqui está o log:
May 21 23:06:58 server sshd[3880]: debug1: Forked child 3975.
May 21 23:06:58 server sshd[3975]: Set /proc/self/oom_score_adj to 0
May 21 23:06:58 server sshd[3975]: debug1: rexec start in 5 out 5 newsock 5 pipe 7 sock 8
May 21 23:06:58 server sshd[3975]: debug1: inetd sockets after dupping: 3, 3
May 21 23:06:58 server sshd[3975]: Connection from XXXXXXXXX port 53446 on 96.126.115.73 port 22
May 21 23:06:58 server sshd[3975]: debug1: Client protocol version 2.0; client software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2
May 21 23:06:58 server sshd[3975]: debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2 pat OpenSSH_6.6.1* compat 0x04000000
May 21 23:06:58 server sshd[3975]: debug1: Enabling compatibility mode for protocol 2.0
May 21 23:06:58 server sshd[3975]: debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2
May 21 23:06:58 server sshd[3975]: debug1: permanently_set_uid: 104/65534 [preauth]
May 21 23:06:58 server sshd[3975]: debug1: list_hostkey_types: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
May 21 23:06:58 server sshd[3975]: debug1: SSH2_MSG_KEXINIT sent [preauth]
May 21 23:06:58 server sshd[3975]: debug1: SSH2_MSG_KEXINIT received [preauth]
May 21 23:06:58 server sshd[3975]: debug1: kex: client->server aes128-ctr [email protected] none [preauth]
May 21 23:06:58 server sshd[3975]: debug1: kex: server->client aes128-ctr [email protected] none [preauth]
May 21 23:06:58 server sshd[3975]: debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth]
May 21 23:06:58 server sshd[3975]: debug1: SSH2_MSG_NEWKEYS sent [preauth]
May 21 23:06:58 server sshd[3975]: debug1: expecting SSH2_MSG_NEWKEYS [preauth]
May 21 23:06:59 server sshd[3975]: debug1: SSH2_MSG_NEWKEYS received [preauth]
May 21 23:06:59 server sshd[3975]: debug1: KEX done [preauth]
May 21 23:06:59 server sshd[3975]: debug1: userauth-request for user andrew service ssh-connection method none [preauth]
May 21 23:06:59 server sshd[3975]: debug1: attempt 0 failures 0 [preauth]
May 21 23:07:02 server sshd[3975]: debug1: PAM: initializing for "andrew"
May 21 23:07:02 server sshd[3975]: debug1: PAM: setting PAM_RHOST to "XXXXXX"
May 21 23:07:02 server sshd[3975]: debug1: PAM: setting PAM_TTY to "ssh"
May 21 23:07:02 server sshd[3975]: debug1: userauth-request for user andrew service ssh-connection method publickey [preauth]
May 21 23:07:02 server sshd[3975]: debug1: attempt 1 failures 0 [preauth]
May 21 23:07:02 server sshd[3975]: debug1: test whether pkalg/pkblob are acceptable [preauth]
May 21 23:07:02 server sshd[3975]: debug1: temporarily_use_uid: 1000/1000 (e=0/0)
May 21 23:07:02 server sshd[3975]: debug1: trying public key file /home/andrew/.ssh/authorized_keys
May 21 23:07:02 server sshd[3975]: debug1: Could not open authorized keys '/home/andrew/.ssh/authorized_keys': Permission denied
May 21 23:07:02 server sshd[3975]: debug1: restore_uid: 0/0
May 21 23:07:02 server sshd[3975]: Failed publickey for andrew from XXXXXXX port 53446 ssh2: RSA 33:63:b9:9d:a2:19:b4:24:9b:88:31:6b:b4:9f:15:f5
May 21 23:07:06 server sshd[3975]: debug1: userauth-request for user andrew service ssh-connection method publickey [preauth]
May 21 23:07:06 server sshd[3975]: debug1: attempt 2 failures 1 [preauth]
May 21 23:07:06 server sshd[3975]: debug1: temporarily_use_uid: 1000/1000 (e=0/0)
May 21 23:07:06 server sshd[3975]: debug1: trying public key file /home/andrew/.ssh/authorized_keys
May 21 23:07:06 server sshd[3975]: debug1: Could not open authorized keys '/home/andrew/.ssh/authorized_keys': Permission denied
May 21 23:07:06 server sshd[3975]: debug1: restore_uid: 0/0
May 21 23:07:06 server sshd[3975]: Failed publickey for andrew from XXXXXXX port 53446 ssh2: RSA 33:63:b9:9d:a2:19:b4:24:9b:88:31:6b:b4:9f:15:f5
May 21 23:07:07 server sshd[3975]: Connection closed by XXXXXXXXXX [preauth]
May 21 23:07:07 server sshd[3975]: debug1: do_cleanup [preauth]
May 21 23:07:07 server sshd[3975]: debug1: monitor_read_log: child log fd closed
May 21 23:07:07 server sshd[3975]: debug1: do_cleanup
May 21 23:07:07 server sshd[3975]: debug1: PAM: cleanup
May 21 23:07:07 server sshd[3975]: debug1: Killing privsep child 3976