How to setup a Magento rewrite rule that keeps it's GET parameters

In our Magento shop we need a few rewrite rules that redirect to another domain. I know how to do that in the Magento Backend Rewrite URl Module, but cannot find a way to let the redirect keep it's parameters.

Is there anyway to do this in Magen开发者_开发技巧to, or must this be done with Apache mod_rewrite?

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If you're implementing the redirect in apache (which is what it looks like?), you'll need to write the apache rule to keep the request parameters.