گرفتن ssl برای سایت

با سلام
چطوری میشه سایتم رو از http به https تغیر بدم که فیلتر نشه؟
با تشکر

ببخشید یه سوال
بعضی وقت ها سایت این ارر را میده به مدت چند دقیقه
مشکل چیه؟

کد:

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Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Apache/2.2.11 (Unix) mod_ssl/2.2.11 OpenSSL/0.9.8e-fips-rhel5 mod_wsgi/3.0c3 Python/2.4.3 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 Server at  Port 80

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