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Note: This has been tested on Ubuntu 10-12, but RSA lookup fails, and SSH BREAKS with AuthUser. I usually just install and comment out AuthUser so if we upgrade, we can just uncomment those lines and be off the the races. As it stands, I am not going to attempt to get RSA SSH on Ubuntu >14, we should just upgrade.

Setup on Client :

sudo su
apt-get update
apt-get install -y libpam-ldap nscd ldap-utils python-pip python-ldap libsasl2-dev python-dev libldap2-dev libssl-dev libnss-ldapd

##INSTALL STEPS###

#NOT LDAPI://, LDAP://
ldap://192.168.1.255

dc=freesoftwareservers,dc=com

{group,pass,shadow} (These options may not all show, manually edit /etc/nsswitch.conf if so)

ldap://192.168.1.255

dc=freesoftwareservers,dc=com

3

YES

NO

cn=admin,dc=freesoftwareservers,dc=com

PASSWORD
sed -i -r 's/(.*)(use_authtok)(.*)/\1\3/g' /etc/pam.d/common-password
grep 'pam_mkhomedir.so' /etc/pam.d/common-session > /dev/null || {
    cat >> /etc/pam.d/common-session <<EOF
session required    pam_mkhomedir.so skel=/etc/skel umask=0022
EOF
}
sh -c 'echo "tls_reqcert never\nnss_initgroups_ignoreusers ALLLOCAL\nbind_timelimit 3\ntimelimit 3" >> /etc/nslcd.conf'
sudo nano /etc/nsswitch.conf
passwd:         compat ldap
group:          compat ldap
shadow:         compat ldap

Enable SSH RSA Key Lookup :

pip install ssh-ldap-pubkey
sh -c 'echo "AuthorizedKeysCommand /usr/local/bin/ssh-ldap-pubkey-wrapper\nAuthorizedKeysCommandUser nobody" >> /etc/ssh/sshd_config' && service ssh restart

Restrict to group ServerAdmins : EDIT OR ADD LOCAL USER eg: localadmin

sudo sh -c 'echo "auth    required    pam_access.so" >> /etc/pam.d/common-auth'
sudo sh -c 'echo "- : ALL EXCEPT root localadmin (admin) (wheel) (ServerAdmins): ALL EXCEPT LOCAL" >> /etc/security/access.conf'

Grant Group ServerAdmins Sudo Access :

sudo visudo
# Members of the LDAP group ServerAdmins may run sudo
%ServerAdmins ALL=(root) ALL
/etc/init.d/nscd restart
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