I found this which may be necessary to patching Radius to work with MS
From: Holmes, Robert
Sent: Thursday, March 15, 2007 6:11 AM
To: 'm0n0wall at lists dot m0n0 dot ch'
Subject: RE: [m0n0wall] Radius & PPTP
Any more movement on this issue? It's a bug that is confirmed by both
monowall and pfsense users.