how to add request header value from inside network on the inbound rules

Hi,

i would like to add a header value on my website when the call is coming from inside of our company, ex the header to be add from the inbound value it could be X_VALUE_INSIDE=true, but when the call of the website came from outside the X_VALUE_INSIDE will set to false or remove.

i the goal of the value will exist only wen the call is coming from our inside server, the value could be insert only when the call is made from on premise server, all the other call to the website the value could not exist.

thanks