MS-Network-Access-Server-Type is a VSA used to specify the type of the network access server making the request.
The fields of MS-Network-Access-Server-Type MUST be set as follows:
Vendor-Type: An 8-bit unsigned integer that MUST be set to 0x2F.
Vendor-Length: An 8-bit unsigned integer that MUST be set to 6.
Attribute-Specific Value: A 32-bit unsigned integer in network byte order that MUST
indicate the type of the NAS. The value MUST be interpreted in accordance with the following table:
0x00000001 Terminal Server Gateway
0x00000002 Remote Access Service (RAS) server (VPN or dial-in)
0x00000003 DHCP server
0x00000005 Health Registration Authority (HRA)
0x00000006 Host Credential Authorization Protocol (HCAP) server
All Other Values A tag value used to identify applicable network access policies on the RADIUS server.