Hi All,
I am using SCM to build various policies and GPO templates for domain joined servers, mainly based on the Windows 2012r2 Member Server template. For the most part, this is great. With regard to network shares, computers outside of the domain cannot connect to a share on Member Server within the domain, which is what would be required most of the time. When a machine from outside of the domain attempts to access a share on a member server with the SCM template applied, I see the following entry in the 'Security' event log:
Log Name: Security
Source: Microsoft-Windows-Security-Auditing
Date: 31/01/2015 00:13:06
Event ID: 4625
Task Category: Logon
Level: Information
Keywords: Audit Failure
User: N/A
Computer: Inside-Domain-Machine.mydom.com
Description:
An account failed to log on.
Subject:
Security ID: NULL SID
Account Name: -
Account Domain: -
Logon ID: 0x0
Logon Type: 3
Account For Which Logon Failed:
Security ID: NULL SID
Account Name: Administrator
Account Domain: Outside-Domain-PC
Failure Information:
Failure Reason: The user has not been granted the requested logon type at this machine.
Status: 0xC000015B
Sub Status: 0x0
Process Information:
Caller Process ID: 0x0
Caller Process Name: -
Network Information:
Workstation Name: Outside-Domain-PC
Source Network Address: x.x.x.x
Source Port: 49485
Detailed Authentication Information:
Logon Process: NtLmSsp
Authentication Package: NTLM
Transited Services: -
Package Name (NTLM only): -
Key Length: 0
This event is generated when a logon request fails. It is generated on the computer where access was attempted.
The Subject fields indicate the account on the local system which requested the logon. This is most commonly a service such as the Server service, or a local process such as Winlogon.exe or Services.exe.
The Logon Type field indicates the kind of logon that was requested. The most common types are 2 (interactive) and 3 (network).
The Process Information fields indicate which account and process on the system requested the logon.
The Network Information fields indicate where a remote logon request originated. Workstation name is not always available and may be left blank in some cases.
The authentication information fields provide detailed information about this specific logon request.
- Transited services indicate which intermediate services have participated in this logon request.
- Package name indicates which sub-protocol was used among the NTLM protocols.
- Key length indicates the length of the generated session key. This will be 0 if no session key was requested.
However, I have need for some machines that I don't want to be domain joined to access shares on some member servers. What is the best way to achieve this?
There are obviously GPOs that affect this connection, as I can always put File server into a OU which blocks inheritance in order to temporarily make a connection, but I want to find something a little more permanent.
I also have a PKI also setup. Is it possible to use certificates to create an authentication? Of course, in its current guise, I can't actually connect to the CA either in order to issue an online request. Again I could move the CA into the blocked OU temporarily, or create an offline request, but this seem a little clumsy.
Any pointers would be gratefully received.
Cheers
Chris