This tutorial describes how you can host multiple SSL-encrypted web sites (HTTPS) on one IP address with Apache 2.2 and GnuTLS on a Debian Lenny server.
For more information on why this couldn’t be done prior to OpenSSL 0.98g or with GnuTLS please refer to http://en.wikipedia.org/wiki/Server_Name_Indication.
I will mention that Virtual Hosting SSLs on the same IP address has 1 or 2 caveats before beginning and before anyone begins ripping out and handing back IPs to their ISPs.
1. Firefox 2.0+ works on all platforms (Mac/Windows/Linux) – it has its own TLS implementation – if you have SSLv2 enabled for VMware tools, Firefox doesn’t work either, but by default Firefox comes with v2 disabled by default
2. Windows XP does not support SNI and still has 40% share in the world so you could alienate a lot of people unless they are using Firefox on XP.
3. Browsers like Safari/Chrome/IE only work on Vista or greater because they use the O/S TLS implementation
4. Safari/Chrome only work on 10.5.7 or above on Macs
You can test if your browser is passing SNI by visiting here: https://sni.velox.ch/
apt-get install libapache2-mod-gnutls
Edit /etc/apache2/ports.conf and add the following line:
Also comment out the following in /etc/apache2/ports.conf:
<IfModule mod_ssl.c> # SSL name based virtual hosts are not yet supported, therefore no # NameVirtualHost statement here Listen 443 </IfModule>
Finally create a file called /etc/apache2/ssl.conf:
NameVirtualHost xx.yy.zz.kk:443 <VirtualHost xx.yy.zz.kk:443> ServerName secure.domain1.com:443 GnuTLSEnable on GnuTLSCertificateFile /etc/apache2/ssl-certs/secure.domain1.com.crt GnuTLSKeyFile /etc/apache2/ssl-certs/secure.domain1.com.key GnuTLSPriorities NORMAL DocumentRoot /web/www1 </VirtualHost> <VirtualHost xx.yy.zz.kk:443> ServerName secure.domain2.com:443 GnuTLSEnable on GnuTLSCertificateFile /etc/apache2/ssl-certs/secure.domain2.com.crt GnuTLSKeyFile /etc/apache2/ssl-certs/secure.domain2.com.key GnuTLSPriorities NORMAL DocumentRoot /web/www2 </VirtualHost>
Add in an include line in /etc/apache2/apache2.conf:
Finally restart Apache2 with:
Note on Godaddy SSLs:
With Godaddy you normally have you import a gd_bundle into Apache with the following OpenSSL directive:
In order to use this root certificate in GnuTLS simply run:
cat gd_intermediate_bundle.crt >> /etc/apache2/ssl-certs/secure.domain1.com.crt
This simply appends the bundle to the end of the certificate and GnuTLS is very happy using it.