Please advice how to make the following redirect:

> 
> www.siteA.com/**directory**/keep-all-those-urls/ → www.siteB.com/**directory**/keep-all-those-urls/
> 
> 
> 

But at same time do **not** redirect other directories:

> 
> www.siteA.com/ → www.siteA.com/ *(no redirect here)*
> 
> 
>