Help on Redirecting/Rewriting URI

We have a request from our testing department to allow traffic into our test site from the outside. This traffic needs to have it's header re-written to contain the internal site when coming in and re-written to have the external site when going out.

 

 

Example:

 

iamoutside.mysite.com is the external site. It needs to browse our internal site (iminside.me) and look like it's browsing imoutside.mysite.com.

 

 

Is there a way I can do this with irules?

 

 

Thank you