Upgrade Advisor detected one or more IP address restrictions on the IIS Web site that hosts the report server or Report Manager virtual directories. Reporting Services does not provide native support for IP address restrictions.
Reporting Services Native.
Setup cannot define IP address restrictions on URLs created for an upgraded report server. Upgrade can continue, but IP address restrictions will not be defined on the Reporting Services URLs.
After upgrade, use ISA Server, your firewall software, or another solution to allow or exclude requests from specific IP addresses to the report server.