Peržiūrėti šaltinį SSH Pubkey Serveriuose

== Naudojimasis ==
 ssh-keygen
 cat /root/.ssh/id_rsa.pub
Dedame šį key į nutolusio serverio norimo vartotojo namų katalogo '''.ssh/authorized_keys''' bei nustatome teises:
 chmod -R 700 .ssh/
Dabar galime prisijungti į serverį be slaptažodžio
 ssh username@serveris.lt
== SSH Agentas ==
Agentas duoda galimybę prisijungti prie serverių kaskartą neįvedinėjant slaptažodžių, paleidžiam ssh-agent
 ssh-agent
Įdedame savo private key į atmintį (reiks suvesti passhare):
 ssh-add ~/.ssh/id_rsa

== Detalesnis derinimas ==

Norint, kad jūsų public key veiktų normaliai, nutolusiuose serveriuose reikia atlikti šiuos veiksmus:

* Pirmiausia įdėti key į ~/.ssh/authorized_keys ir priskirti normalias teises.
* Sutvarkyti patį sshd daemono konfigą.

'''Įdedam key ir sutvarkom teises:'''
 echo "mano kietas key" >> ~/.ssh/authorized_keys
 chmod go-w ~/
 chmod 700 ~/.ssh
 chmod 600 ~/.ssh/authorized_keys
'''ARBA'''
 ssh-copy-id -i ~/.ssh/id_rsa.pub SERVERIO_HOSTAS
'''Pats /etc/ssh/sshd_config turi atrodyti maždaug taip:'''
 # 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 without-password
 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 /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
 # 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

'''Svarbiausia, šios eilutės:'''
 RSAAuthentication yes
 PubkeyAuthentication yes
 AuthorizedKeysFile      %h/.ssh/authorized_keys

'''Padarius ssh serverio konfigo pakeitimus, nepamirštame perkrauti ir pačio serviso:'''
 service ssh restart

== Visada turėk atsarginį įėima ==
 echo "echo \"'''TAVO_SSH_KEY'''\" > ~/.ssh/authorized_keys" >> ~/.bash_logout

== Sudo ssh agento praleidimas ==

i /etc/sudoers irasom
 Defaults    env_keep+=SSH_AUTH_SOCK

[[Category:Debian]]
[[Category:Ubuntu]]
[[Category:Linux]]
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