redirecting technique -- coding default.aspx for the redirect

I want to redirect:
https://InventoryPro.dev.FordMotorCo.net/Pages/Default.aspx
without redirecting:
https://InventoryPro.dev.FordMotorCo.net/Pages/Authentication/Login.aspx

If I do that through DNS, then I don't think it can be done, becuase, both pages will be rerouted (it will essentially remap InventoryPro.dev.FordMotorCo.net).

The solution I think, is to rename Default.aspx into OldDefault.aspx, and create another Default.aspx that does the reroute.

What would be the content of Default.aspx to allow such a reroute to, say,

http://sharepoint/sites/Compliance-COE-NA/Training/default.aspx 
 
?

Just looking for the textual content.

If I am mistaken, and this would not accomplish my goal, then please just share with me how I can accomplish the redirect and leave the backdoor open for us to analyze the website (Backdoor:  https://InventoryPro.dev.FordMotorCo.net/Pages/Authentication/Login.aspx).