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Installing mod_ssl on Apache on CentOS 5 - Apache Webmaster Tips, Knowledge Base Webmaster Tools
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| | Category | : Apache | | Written by | : Admin | | Date | : 2008-11-16 | | Rating | : 0  | Voted : 0 times | | Hit | : 674 | | | | |
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I was moving a customer's website from its old dedicated web server to a shiny new one, installing CentOS 5 on it with Apache 2.2 (known simply as "httpd" on RedHat Enterprise Linux and therefore CentOS, which is derived from RHEL) and MySQL 5.0. They already had a secure certificate running on the old site, so I copied the certificate files over and the secure server settings into the appropriate configuration file.
I then ran the command
sudo service httpd reload
to reload Apache and take in the new configuration settings but instead of it being reloaded I got this error message instead:
Syntax error on line 35 of /etc/httpd/vhosts.d/plates.conf:
Invalid command 'SSLEngine', perhaps misspelled or defined by a module not included in the server configuration
I had forgotten to install mod_ssl as part of Apache. A quick yum search mod_ssl revealed:
$ yum search mod_ssl
Loading "installonlyn" plugin
Setting up repositories
Reading repository metadata in from local files
mod_ssl.x86_64 1:2.2.3-6.el5.centos.1 base
Matched from:
mod_ssl
The mod_ssl module provides strong cryptography for the Apache Web
server via the Secure Sockets Layer (SSL) and Transport Layer
Security (TLS) protocols.
mod_ssl.x86_64 1:2.2.3-7.el5.centos updates
Matched from:
mod_ssl
The mod_ssl module provides strong cryptography for the Apache Web
server via the Secure Sockets Layer (SSL) and Transport Layer
Security (TLS) protocols.
So all I needed to do was:
sudo yum install mod_ssl
This automatically configured Apache to use SSL when it was restarted, by adding the file /etc/httpd/conf.d/ssl.conf which contains the necessary stuff to enable SSL. I restarted Apache with a sudo service httpd restart and was good to go.
Update: I discovered that there were errors and it wasn't actually using the valid secure certificate. Read more details about this in the Default virtualhost's secure certificate used with mod_ssl post.
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