PI Sender HTTP adapter restricting access by IP
We have a web service hosted on PI and we would like to limit access to this web service to only one web service client application. This is a high volume interface and not particularly sensitive data so we are not really looking for the SSL overhead. Is there any way other than SSL or using the HTTP logon procedure of AS-ABAP to restrict access to this web service? For example, can we specify anywhere on the AS or in the configuration of the PI Sender HTTP adapter that only requests from a certain IP addresses be processed?