Oops, no RSA or DSA server certificate found for 'server.host.name:0'?
I'm setting up a new web server that hosts a dozen virtual hosts on Ubuntu 12.4 using Apache 2.2.22 with one config file per site. I created all the configuration files all at once and ran a2ensite * to enable them all at once. When I reloaded the configuration it failed and after restarting apache I found the following error message in my error.log:
Oops, no RSA or DSA server certificate found for 'server.host.name:0'?!
Most of the results for this error message are years old that don't fix the problem or are bugs that have been fixed https://issues.apache.org/bugzilla/show_bug.cgi?id=31709
Solution 1:
From: http://www.clearchain.com/blog/posts/solving-the-apache-ssl-error-oops-no-rsa-or-dsa-server-certificate-found-for-www-somedomain-com0
Summary: This error may also occur if you forget the following line in your VirtualHost section:
SSLEngine on
Solution 2:
The problem ended up being in a different configuration file than the host that was listed in the error. It was due to the fact that there were duplicate ServerName values in two of the files. I fixed the wrong one and it started back up (bye bye that half an hour) :-) .
To troubleshoot this I disabled all the sites and then enabled a couple at a time until I ran into the problem again.
Solution 3:
You may also receive this error if you are using a cert with multiple subject alternate names, but the ServerName directive does not match the CN or SAN value(s) of the certificate. IT is often the case where a developer wants a development version of the same production site, but there is no real certificate for the development site.
Example websites:
webserver.example.com
webserver-dev.example.com
Certificate:
CN = primaryserver.example.com
SANs = webserver.example.com, puppies.example.com, kittens.example.com
The following configuration will cause this error:
/etc/apache2/sites-enabled/webserver.example.com-ssl.conf<IfModule mod_ssl.c>
<VirtualHost *:443>
ServerName webserver.example.com
...
/etc/apache2/sites-enabled/webserver-dev.example.com-ssl.conf<IfModule mod_ssl.c>
<VirtualHost *:443>
ServerName webserver-dev.example.com
...
The following configuration resolves this issue:
/etc/apache2/sites-enabled/webserver.example.com-ssl.conf<IfModule mod_ssl.c>
<VirtualHost *:443>
ServerName webserver.example.com
...
/etc/apache2/sites-enabled/webserver.example.com-ssl.conf<IfModule mod_ssl.c>
<VirtualHost webserver-dev.example.com:443>
ServerName webserver.example.com
...