Tagarchief: mod_auth_ntlm_winbind

Install mod_auth_ntlm_winbind on CentOS 6.0

Step 1. Install ntp and synchronize clocks

We'll be using winbind, kerberos and ntlm to authenticate the user. This requires the clocks of the AD server and the proxy server to be synchronized.

yum -y install ntp
sed -i "s/^server /#server /g" /etc/ntp.conf
echo "server YOURSERVERNAME" >> /etc/ntp.conf
ntpdate YOURSERVERNAME #synchronize right now
service ntpd start #and keep in sync
chkconfig ntpd on #after reboot as well

Step 2. Update system and install required software

yum update
yum install mc vim httpd php svn httpd-devel make autoconf gcc ntp krb5-workstation \
samba-common authconfig samba-winbind

Step 3. Connect to active directory

Please note that MYCOMPANY.local and mycompany.local may be different domains due to the upper/lowercase.

ADSERVER=sbs.MYCOMPANY.local
DOMAIN=MYCOMPANY.local
WORKGROUP=MYCOMPANY
authconfig --enableshadow --enablemd5 --passalgo=md5 --krb5kdc=$ADSERVER \
--krb5realm=$DOMAIN --smbservers=$ADSERVER --smbworkgroup=$WORKGROUP \
--enablewinbind --enablewinbindauth --smbsecurity=ads --smbrealm=$DOMAIN \
--smbidmapuid="16777216-33554431" --smbidmapgid="16777216-33554431" --winbindseparator="+" \
--winbindtemplateshell="/bin/false" --enablewinbindusedefaultdomain --disablewinbindoffline \
--winbindjoin=Administrator --disablewins --disablecache --enablelocauthorize --updateall
service winbind start ; chkconfig winbind on
setsebool -P allow_httpd_mod_auth_ntlm_winbind on

Now check your winbind connection using the following commands:

wbinfo -u
wbinfo -g

The socket /var/lib/samba/winbindd_privileged/pipe should be writable by the webserver. To allow that access, I add user apache to the group wbpriv: usermod -G wbpriv apache

Step 4. Download and compile mod_auth_ntlm_winbind

svn co svn://svnanon.samba.org/lorikeet/trunk/mod_auth_ntlm_winbind mod_auth_ntlm_winbind
cd mod_auth_ntlm_winbind/
autoconf
./configure
apxs -DAPACHE2 -c -i mod_auth_ntlm_winbind.c

Step 5. Configure it

In /etc/httpd/conf.d/mod_auth_ntlm_winbind.conf I put the following configuration

LoadModule auth_ntlm_winbind_module /usr/lib64/httpd/modules/mod_auth_ntlm_winbind.so
<Directory "/var/www/html">
Options ExecCGI
AllowOverride None
Order allow,deny
Allow from all
AuthName "NTLM Authentication"
AuthType NTLM
Require valid-user
NTLMAuth on
NTLMAuthHelper "/usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp"
NTLMBasicAuthoritative on
</Directory>

In /etc/httpd/conf/httpd.conf, change KeepAlive Off to KeepAlive On. Preferably, also set MaxKeepAliveRequests and KeepAliveTimeout to a high value. On my intranet server, they're set to 1000 requests and 600 seconds.:w

Step 6. Change your firewall to enable incoming HTTP

iptables -I INPUT -p tcp --dport 80 -j ACCEPT
service iptables save

Step 7. Go!

Run service httpd restart, make httpd start on reboot using chkconfig httpd on and test your configuration.

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