Manually remove old CA references in Active Directory

Microsoft Security Solutions

directory-icon

Summary

When a CA server is uninstalled or crashes beyond recovery some objects are left in Active Directory. It’s good practice to remove these obsolete objects.

Background

When you install a version of Certificate Authority that is Active Directory-integrated (i.e. Enterprise Root or Enterprise Subordinate) the following 6 objects are created/modified in the Active Directory database:

Name: <CA Common Name>
Type: certificateAuthority
LDAP Path: CN=AIA,CN=Public Key Services,CN=Services,CN=Configuration,DC=DC=example,DC=com
Used for: Contains CA certificates that clients can fetch when validating a certificates chain. Certificates can point to this location via the Authority Information Access (AIA) certificate extension.

Name: <CA Common Name>
Type: crlDistributionPoint
LDAP Path: CN=<CAServerName>,CN=CDP,CN=Public Key Service,CN=Services,CN=Configuration,DC=DC=example,DC=com
Used for: Contains CRLs (base and delta) that CAs has published in the AD. Certificates can point to this location via the CRL Distribution Point (CDP) certificate extension.

Name: <Root CA Common…

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Always On VPN and Windows Server 2019 NPS Bug

Richard M. Hicks Consulting, Inc.

When deploying a Windows Server 2019 Network Policy Server (NPS) to support a Windows 10 Always On VPN implementation, administrators may encounter the following error when attempting to establish a VPN connection on a remote Windows 10 client.

Can’t connect to [connection name].

The connection was prevented because of a policy configured on your RAS/VPN server. Specifically, the authentication method used by the server to verify your username and password may not match the authentication method configured in your connection profile. Please contact the Administrator of the RAS server and notify them of this error.

Always On VPN and Windows Server 2019 Network Policy Server Bug
In addition, an event ID 20227 from the RasClient will be recorded in the application event log with the following error message.

The user [username] dialed a connection named [connection name] which has failed. The error code returned on failure is 812.

Always On VPN and Windows Server 2019 Network Policy Server Bug

Common Causes

Always On VPN error code 812 indicates an authentication policy mismatch…

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unifi dynamic vlan with nps

NPS with dynamic vlan is working fine, but you have restrictions.

You can use dynamic vlan only when it´s not used by a another network.

Look below, 1, 5, 1 is used, now you can´t use this in your dynamic vlan configuration with nps.

Under profiles you must enable radius assigned vlan for wired/wireless network in your radius profile

How to configure dynamic vlan with nps, you can look here
http://wifinigel.blogspot.com/2014/03/microsoft-nps-as-radius-server-for-wifi_18.html

Dynamic VLAN Assignment (Cisco and NPS)

Mike Pemberton's Blog

In an earlier post we used 802.1x to authenticate users into the network and assign them into a VLAN based on either a successful or unsuccessful authentication as well as a VLAN for clients who did not send an initial EAPOL message. While this can be quite useful, it can also be quite restrictive – what if we wanted different authenticated users into different VLANs rather than just the authenticated VLAN? This is entirely do-able. An example use case would be having be an office with several hot desks, used by various departments, but a compliance restriction that places heavy restrictions on network access into particular resources such as HR, finance and so on. It would be an administrative headache to keep logging into the switch each time to change the VLAN depending on who was sat at these hot desks for the day, so we can leverage 802.1x to do…

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Filter or LDAP filter

Richard Siddaway's Blog

Many of the Microsoft AD cmdlets have a –Filter and an –LDAPFilter parameter. So what’s the difference?

PS> Get-Help Get-ADUser -Parameter *Filter*

-Filter <String>
Specifies a query string that retrieves Active Directory objects. This string uses the PowerShell Expression
Language syntax. The PowerShell Expression Language syntax provides rich type-conversion support for value types received by the Filter parameter. The syntax uses an in-order representation, which means that the operator is placed between the operand and the value. For more information about the Filter parameter, see about_ActiveDirectory_Filter.

-LDAPFilter <String>
Specifies an LDAP query string that is used to filter Active Directory objects. You can use this parameter to run your existing LDAP queries. The Filter parameter syntax supports the same functionality as the LDAP syntax. For more information, see the Filter parameter description and the about_ActiveDirectory_Filter.

This means you have two ways to approach a problem. Lets think about finding a…

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How to set up VMware ESXi, a Synology NFS NAS, and Failover Storage Networking

Frank's Tech Support

Hello, sandwich fans!  It’s been awhile since I’ve written, but I have some fresh deli meat for you today.  If you recall, last year I wrote a blog post about setting up VMware, Synology, and iSCSI MPIO.   It turns out to have been my most-read post so far, for which I thank you.  Since I’ve gotten such positive feedback, today I’m going to show you a similar setup, but this time I’m going to use NFS instead of iSCSI.

There are some pretty significant differences between iSCSI and NFS, both in terms of architecture and performance. One big difference is that NFS really doesn’t have support for multi-pathing (MPIO) in the way that iSCSI does.  It has a few work-arounds like using alternate subnets and so forth, but for today we’re going to rely on simple failover on the host side with LACP link bonding on the storage side.   …

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The EMP and DEPT tables in Oracle

oracle sample database for trainee

APEXPLAINED

I often use the EMP and DEPT tables for test and demonstration purposes. Both these tables are owned by the SCOTT user, together with two less frequently used tables: BONUS and SALGRADE. Execute the below code snippets to create and seed the EMP and DEPT tables in your own schema. The BONUS and SALGRADE tables are included as well, but are commented out. The DDL (data definition language) part creates the tables, the DML (data manipulation language) part inserts the data.

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MultiPoint Services Role in Windows Server 2016

UseIT | Roman Levchenko

multipoint_services_windows_server_2016_10

Introduction

MultiPoint Server (MPS) is a technology and solution based on Windows Server and Remote Desktop Services. MPS was originally built for use in the classrooms and educational institutions and It allows you to provide low-cost sharing between MPS and user stations. User stations can be consist of only monitor, keyboard, mouse (zero clients) and be connected to MPS through USB (usb hubs), video cables or through LAN (RDP-over-LAN, if clients are not zero. for example, laptops, thin clients and etc..).  MPS uses some of the RDS services (by default): RD Session Host and RD Licensing Server.

First version of MPS was released in February, 2010 . In MPS 2010 you can connect stations and host only through USB hubs and video ports.

Ability to use LAN between user stations and MPS was added only to the next version – MPS 2011 released in March, 2011.

Some of the main features of…

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