We are supporting several .NET applications for a government client and need a way to monitor performance for these applications. However the government restricts access to external internet access from this web server. Most of these tools like New Relic APM require sending information thru the internet/cloud, are there tools that work without accessing the cloud?
Have you looked at APM tools such as Dynatrace AppMon & UEM. Dynatrace can be deployed on-premise which means that all your data stays within your data center. I suggest you watch my youtube tutorial on what dynatrace is and how it works. In that webinar I also instrument a .NET App to show how easy it is to set it up and capture data: What is Dynatrace AppMon & UEM and how does it work