Purely FYI for those wondering: yeah, this is the default when connecting to MSSQL from the same box. It's not an IIS thing per se. Any app can do this with the

Purely FYI for those wondering: yeah, this is the default when connecting to MSSQL from the same box. It's not an IIS thing per se. Any app can do this with the appropriate connection string. https://learn.microsoft.com/en-us/sql/tools/configuration-manager/shared-memory-properties?view=sql-server-ver16 https://learn.microsoft.com/en-us/sql/tools/configuration-ma... https://learn.microsoft.com/en-us/sql/tools/configuration-manager/creating-a-valid-connection-string-using-shared-memory-protocol?view=sql-server-ver16 https://learn.microsoft.com/en-us/sql/tools/configuration-ma... It's been ages since I worked in Microsoft land, but this is one of the reasons why MS shops often scale up instead of out. Imagine a single box with a dozens of beefy cores and a couple hundred gigs of RAM running both IIS and SQL. That's... a significant amount of power. It's also a potentially massive blast radius for security oopsies, but I don't know the practical history of how secure it has or hasn't been, or how it integrates with things like clustering etc.