Dynamic VLAN Assignment (Cisco and NPS)

February 4, 2019 / Konkretor / Leave a comment

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

January 28, 2019 / Konkretor / Leave a comment

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

January 21, 2019 / Konkretor / Leave a comment

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

January 21, 2019 / Konkretor / Leave a comment

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

January 14, 2019January 14, 2019 / Konkretor / Leave a comment

UseIT | Roman Levchenko

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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bash history persistent

January 10, 2019 / Konkretor / Leave a comment

If you want your bash history persistent

https://eli.thegreenplace.net/2013/06/11/keeping-persistent-history-in-bash

Server 2016 RDS via Azure AD Application Proxy end-to-end guide

December 20, 2018 / Konkretor / Leave a comment

gshaw0

remote_desktop_blue One of our priorities for this year was to improve our remote access offering to staff to enable more flexible working whilst outside of college. Office 365 helps greatly and has already improved functionality in many ways but there’s still some legacy applications and classic file shares that need to be provided remotely too. If at all possible we prefer the files not to leave the network so some form of virtual desktop looked the way to go.

After discounting VMware and Citrix offerings on cost grounds the improvements to Microsoft’s RDS offering in Server 2016 seemed to come at a perfect time.

Even more so now we’ve implemented Azure AD Application Proxy (more on that shortly!) We’ve also recently decommissioned some services that freed up a bit of physical hardware resource to “play” with so away we went!