Is there a way to restrict access to a Reports PermaLink / URL using an IP address range

Is there a way to restrict access to a Reports PermaLink / URL using an IP address range

I like the ability to publish a report and dashboard without the need for users to have to login but I'm concerned about access by users outside our company. I had thought I could restrict access to these using allowed IP address range in my profile but that does not seem to restrict anything. Any ideas on how I can limit access to just people who are on our corporate network but still use the Publish Report Link without login feature.