Windows Security Log Event ID 6273

Operating Systems Windows 2008 R2 and 7
Windows 2012 R2 and 8.1
Windows 2016 and 10
Windows Server 2019 and 2022
Category
 • Subcategory
Logon/Logoff
 • Network Policy Server
Type Success
Corresponding events
in Windows 2003
and before
 

6273: Network Policy Server denied access to a user

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Server 2016 and later has the following modifications to the event fields:

  • OS-Vesion removed

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Description Fields in 6273

User:

  • Security ID
  • Account Name
  • Account Domain
  • Fully Qualified Account Name

Client Machine:

  • Security ID
  • Account Name
  • Fully Qualified Account Name
  • OS-Version (Removed in 2016)
  • Called Station Identifier
  • Calling Station Identifier

NAS:

  • NAS IPv4 Address
  • NAS IPv6 Address
  • NAS Identifier
  • NAS Port-Type
  • NAS Port

RADIUS Client:

  • Client Friendly Name
  • Client IP Address

Authentication Details:

  • Connection Request Policy Name
  • Network Policy Name
  • Authentication Provider
  • Authentication Server
  • Authentication Type
  • EAP Type
  • Account Session Identifier
  • Logging Results
  • Reason Code
  • Reason

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Examples of 6273

2016 and later

Network Policy Server denied access to a user.

Contact the Network Policy Server administrator for more information.

User:

   Security ID:   %1
   Account Name:   %2
   Account Domain:   %3
   Fully Qualified Account Name: %4

Client Machine:

   Security ID:   %5
   Account Name:   %6
   Fully Qualified Account Name: %7
   Called Station Identifier:  %8
   Calling Station Identifier:  %9

NAS:

   NAS IPv4 Address:  %10
   NAS IPv6 Address:  %11
   NAS Identifier:   %12
   NAS Port-Type:   %13
   NAS Port:   %14

RADIUS Client:

   Client Friendly Name:  %15
   Client IP Address:   %16

Authentication Details:

   Connection Request Policy Name:  %17
   Network Policy Name:  %18
   Authentication Provider:  %19
   Authentication Server:  %20
   Authentication Type:  %21
   EAP Type:   %22
   Account Session Identifier:  %23

   Logging Results:  %26
   Reason Code:   %24
   Reason:    %25

2012r2

Network Policy Server denied access to a user.

Contact the Network Policy Server administrator for more information.

User:

   Security ID:   %1
   Account Name:   %2
   Account Domain:   %3
   Fully Qualified Account Name: %4

Client Machine:

   Security ID:   %5
   Account Name:   %6
   Fully Qualified Account Name: %7
   OS-Version:   %8
   Called Station Identifier:  %9
   Calling Station Identifier:  %10

NAS:

   NAS IPv4 Address:  %11
   NAS IPv6 Address:  %12
   NAS Identifier:   %13
   NAS Port-Type:   %14
   NAS Port:   %15

RADIUS Client:

   Client Friendly Name:  %16
   Client IP Address:   %17

Authentication Details:

   Connection Request Policy Name:  %18
   Network Policy Name:  %19
   Authentication Provider:  %20
   Authentication Server:  %21
   Authentication Type:  %22
   EAP Type:   %23
   Account Session Identifier:  %24

   Logging Results:  %27
   Reason Code:   %25
   Reason:    %26

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