SNI with mod gnutls on CentOS Revision as of Friday, 4 June 2021 at 03:52 UTC

Installed on a 64-bit CentOS 5.8 system.

Configuring Apache for SNI

# Configure CentOS Testing repo and install mod_gnutls  
wget http://dev.centos.org/centos/5/CentOS-Testing.repo -P /etc/yum.repos.d  
yum install mod_gnutls

Here’s the package manifest:

/etc/httpd/conf.d/mod_gnutls.conf  
/etc/httpd/conf/dhfile  
/etc/httpd/conf/rsafile  
/usr/lib64/httpd/modules/libmod_gnutls.so  
/usr/share/doc/mod_gnutls-0.2.0  
/usr/share/doc/mod_gnutls-0.2.0/LICENSE  
/usr/share/doc/mod_gnutls-0.2.0/NOTICE  
/usr/share/doc/mod_gnutls-0.2.0/README  
/var/cache/mod_gnutls_cache   

Symlink the shared object file:

ln -s /usr/lib64/httpd/modules/libmod_gnutls.so /etc/httpd/modules/mod_gnutls.so

Disable ssl.conf from loading

mv /etc/httpd/conf.d/ssl.conf{,.old}

Edit /etc/httpd/conf.d/mod_gnutls.conf and uncomment (or add) the
following:

LoadModule gnutls_module modules/mod_gnutls.so  
AddType application/x-x509-ca-cert .crt  
AddType application/x-pkcs7-crl    .crl  
Listen 443

Configuring Virtual Hosts

Let’s say I want SNI for two virtual hosts:

• test.example.com
• test.eng.uiowa.edu (merely a CNAME for the above)

I create a configuration file for each in /etc/httpd/conf.d/. Let’s
start with test.example.com. Here’s a skeleton:

<VirtualHost 19.65.24.170:80>  
    ServerName test.example.com  
    DocumentRoot /var/www/html/test.example.com  
    ServerAdmin support@test.example.com  
  
    <Directory />  
        Options FollowSymLinks -Indexes  
        AllowOverride All  
    </Directory>  
  
    CustomLog /var/log/httpd/test.example.com-access.log combined  
    ErrorLog /var/log/httpd/test.example.com-error.log  
    LogLevel warn  
</VirtualHost>  
  
<VirtualHost 19.65.24.170:443>  
    GnuTLSEnable on  
    GnuTLSCertificateFile /etc/pki/tls/certs/test.example.com.crt  
    GnuTLSKeyFile /etc/pki/tls/private/test.example.com.key  
  
    ServerName test.example.com  
    DocumentRoot /var/www/html/test.example.com  
    ServerAdmin support@test.example.com  
  
    <Directory />  
        Options FollowSymLinks -Indexes  
        AllowOverride All  
    </Directory>  
  
    CustomLog /var/log/httpd/test.example.com-access.log combined  
    ErrorLog /var/log/httpd/test.example.com-error.log  
    LogLevel warn  
</VirtualHost>

I do the same for the other virtual host and restart Apache. Done.