filtering traffic based on post data
I'm trying to allow traffic based on data being posted to our site.
this is what;s happening on the client side:
METHOD='POST' NAME='Test1' ID='Test1' action='http://www.mysite.com'>
I want to be able to allow traffic to my side only based on identifying the key posted in this request.
Does this make sense? If not, is there any other way similar to this, in which I will be able to identify traffic coming to me from a different site?