Multiple RSA server certificates not allowed

Question

I purchased a multidomain certificate, and I was trying to install it on my server.

I put the following information inside the virtual host for one of my sites:

<VirtualHost *:443>
...
SSLEngine on
SSLCertificateFile /etc/apache2/ssl/16478325.crt
SSLCertificateKeyFile /etc/apache2/ssl/private.key
SSLCertificateChainFile /etc/apache2/ssl/16478325.ca-bundle
...

I then tried to restart apache, and got a failure, and I was told to check my apache logs.

The error message received was this:

Init: Multiple RSA server certificates not allowed

I assumed that that meant I had to install an SSL certificate for the entire site, not on one domain.

But that also did not work.

I got the error:

Illegal attempt to re-initialise SSL for server (SSLEngine On should go in the VirtualHost, not in global scope.)

Why isn't this working? How do I configure my domains to each have SSL?

Solution

(summary of comments)

You have a conflicting SSL virtual host from the Ubuntu/Debian default-ssl virtual host. a2dissite default-ssl will fix the immediate problem.

The Apache HTTP Server Wiki has a guide to configuring name-based SSL virtual hosts which you should review. The guide shows them all in one file, but you can split the different VirtualHost sections to different files (in sites-available/)—they're all included in the main config anyway. You can put stuff like the NameVirtualHost line in ports.conf or in conf-available/. /usr/share/doc/apache2/README.Debian.gz contains some documentation on the Debian/Ubuntu apache config handling.