Eu configurei uma rede doméstica atrás de um roteador há algum tempo e uso o openssh para acessar a rede que consiste em meu laptop, o netbook da minha esposa e minha área de trabalho, todos executando l / x / ubuntu 12.04. Isso funcionou perfeitamente por algum tempo.
Agora só consigo acessar de e para o netbook e os outros 2, mas sem acesso entre o laptop e o desktop. Eu nunca usei a rota id_ *, portanto não tenho arquivos id_ * nos diretórios ~ / .ssh.
Eu tentei várias estratégias aconselhadas em fóruns como este, por exemplo. excluindo o known_hosts e alterando os arquivos de configuração como PasswordAuthentication para no, yes e commented out. Nenhum dos quais funciona.
A única coisa em que consigo pensar é que meus recentes ajustes na configuração de uma rede vpn entre o laptop e a área de trabalho podem ter mudado alguma coisa para interromper o funcionamento do ssh entre essas duas máquinas. btw eu não consegui obter o vpn a trabalhar ainda (ver post anterior neste fórum).
O arquivo / etc / ssh / sshd_config na minha área de trabalho é:
# 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
#Privilege Separation is turned on for security
UsePrivilegeSeparation yes
# Lifetime and size of ephemeral version 1 server key
KeyRegenerationInterval 3600
ServerKeyBits 768
# Logging
SyslogFacility AUTH
LogLevel INFO
# Authentication:
LoginGraceTime 120
PermitRootLogin yes
StrictModes yes
RSAAuthentication yes
PubkeyAuthentication yes
#AuthorizedKeysFile %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 yes
# 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 internal-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
Match User sftpuser #group sftponly
ChrootDirectory /media/Backups/ftp
X11Forwarding yes
AllowTcpForwarding yes
ForceCommand internal-sftp
O comando ssh -v laptop é produzido:
OpenSSH_5.9p1 Debian-5ubuntu1.1, OpenSSL 1.0.1 14 Mar 2012
debug1: Reading configuration data /home/malapradej/.ssh/config
debug1: /home/malapradej/.ssh/config line 1: Applying options for laptop
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 192.168.0.2 [192.168.0.2] port 22.
debug1: Connection established.
debug1: identity file /home/malapradej/.ssh/id_rsa type -1
debug1: identity file /home/malapradej/.ssh/id_rsa-cert type -1
debug1: identity file /home/malapradej/.ssh/id_dsa type -1
debug1: identity file /home/malapradej/.ssh/id_dsa-cert type -1
debug1: identity file /home/malapradej/.ssh/id_ecdsa type -1
debug1: identity file /home/malapradej/.ssh/id_ecdsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.9p1 Debian-5ubuntu1.1
debug1: match: OpenSSH_5.9p1 Debian-5ubuntu1.1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.9p1 Debian-5ubuntu1.1
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 [email protected]
debug1: kex: client->server aes128-ctr hmac-md5 [email protected]
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA 1e:f2:57:81:28:8a:12:d3:7e:2d:04:c2:82:4f:43:72
debug1: Host '192.168.0.2' is known and matches the ECDSA host key.
debug1: Found key in /home/malapradej/.ssh/known_hosts:1
debug1: ssh_ecdsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /home/malapradej/.ssh/id_rsa
debug1: Trying private key: /home/malapradej/.ssh/id_dsa
debug1: Trying private key: /home/malapradej/.ssh/id_ecdsa
debug1: No more authentication methods to try.
Permission denied (publickey).