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Debian 7 SSO

liberodark

Bonjour,

Petite présentation sur comment rejoindre un serveur AD avec Debian 7.

Voici comment faire.

Présentation du cas :

Serveur AD :
Nom : my-adserv.fr
Serveur : fr-dc01.my-adserv.fr

Serveur Cible :
Nom : atmos
Serveur : atmos.my-adserv.fr

Renommer le serveur :

nano /etc/hostname

atmos.my-adserv.fr

Éditer votre Hosts :

nano /etc/hosts

127.0.0.1       localhost
127.0.1.1       atmos.my-adserv.fr

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

Éditer votre fichier Resolv :

nano /etc/resolv.conf

domain my-adserv.fr
search my-adserv.fr
nameserver 10.10.28.55 (Selon vos DNS)

Éditer votre fichier krb5 :

nano /etc/krb5.conf

[libdefaults]
 default_realm = MY-ADSERV.FR
 dns_lookup_realm = false
 dns_lookup_kdc = false
[realms]
 MY-ADSERV.FR = {
  kdc = fr-dc01.my-adserv.fr
 }

[domain_realms]
        .MY-ADSERV.FR = MY-ADSERV.FR
        .kerberos.server = fr-dc01.MY-ADSERV.FR

[appdefaults]
 pam = {
   debug = false
   ticket_lifetime = 36000
   renew_lifetime = 36000
   forwardable = true
   krb4_convert = false
 }

[domain_realm]
 my-adserv.fr = MY-ADSERV.FR
 .my-adserv.fr = MY-ADSERV.FR

Éditer votre fichier nsswitch :

nano /etc/nsswitch.conf

# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.

passwd:         compat winbind
group:          compat winbind
shadow:         compat

hosts:          files dns
networks:       files

protocols:      db files
services:       db files
ethers:         db files
rpc:            db files

netgroup:       nis

Éditer votre fichier smb :

nano /etc/samba/smb.conf

[global]
        security = ADS
#        security = DOMAIN
        realm = my-adserv.fr
#        password server = *
        password server = fr-dc01.my-adserv.fr
        workgroup = MY-ADSERV
        idmap uid = 16777216-33554431
        idmap gid = 16777216-33554431
        winbind enum users = yes
        winbind enum groups = yes
        template homedir = /home/%D/%U
        template shell = /bin/bash
        client use spnego = yes
        client ntlmv2 auth = yes
        encrypt passwords = true
        winbind use default domain = yes
        restrict anonymous = 2
        domain master = no
        local master = no
        preferred master = no
        os level = 0

        server string = %h server
        obey pam restrictions = Yes
        pam password change = Yes
        passwd program = /usr/bin/passwd %u
        passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfu$
        unix password sync = Yes
        syslog = 1
        log file = /var/log/samba/log.%m
        max log size = 1000
        dns proxy = No
        panic action = /usr/share/samba/panic-action %d
        winbind offline logon = true

[homes]
        comment = Home Directories
        valid users = %S
        create mask = 0700
        directory mask = 0700
        browseable = No

Éditer votre fichier sshd_config :

nano /etc/ssh/sshd_config

# 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 yes
#KerberosGetAFSToken no
KerberosOrLocalPasswd yes
KerberosTicketCleanup yes

# GSSAPI options
GSSAPIAuthentication yes
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 variablDOMAINes
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

Rejoindre le Domaine :

net ads join -U admin@my-adserv.fr

Appliquer les modifications :

pam-auth-update && reboot

Pour CentOS 6

authconfig --update && reboot

Voilà vous avez rejoint votre domaine via winbind

Si vous avez besoin de quitter un domaine :

Quitter le Domaine :

net ads leave -U admin@my-adserv.fr

Appliquer les modifications :

pam-auth-update

Pour CentOS 6

authconfig --update --disablekrb5 --disablekrb5realmdns --disablewinbind --disablewinbindkrb5

PS : Petit message d'avertissement car si vous ne savez pas ce que vous faite vous pouvez mettre en pérille votre infra de production !
Ceci est une note technique et donc en aucun cas une configuration à utiliser en production.
Il vous faut adapter les configurations selon vos besoins.