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Asked: 2010-03-03 23:05:00 +0800 CST

Apache options problem

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httpd -k start -DSSL

What does -DSSL mean here?

apache-2.2

3 Answers

  1. this means, that apache will be started with SSL support. this defines the variable SSL and in your config shoud be a line like this somewhere:

    <IfDefine SSL>
...
</IfDefine>

    everything between the IfDefine lines will only be activated when -DSSL is set.

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  2. The man page of httpd says:

    -D parameter

    Sets a configuration parameter which can be used with <IfDefine> sections in the configuration files to conditionally skip or process commands at server startup and restart. Also can be used to set certain less-common startup parameters including -DNO_DETACH (prevent the parent from forking) and -DFOREGROUND (prevent the parent from calling setsid() et al).

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  3. It turns on SSL support. I don't tend to do it this way, but use a2enmod to enable the SSL module, and SSLEngine On in the vhost config.

    From the httpd manpage:

    httpd can be made to support HTTPS transactions if RSA certificates are generated and the utility is started with the -DSSL flag. See ssl(8) for further information.

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