Practical Use of the REST API Using the Example of EGroupware

The Univention Directory Manager (UDM) enables access to content in the LDAP directory service, for example viewing, editing, deleting, and moving of objects (users, groups, computers, printers, shares, etc.).
The UDM can be accessed and controlled via both the web interface and the command line. In UCS 4.4-2, a third option has now also been added: the REST API. This interface connects applications with the UCS directory service via HTTPS and supports the maintenance of the user properties or computer objects of the connected systems.
This article begins by explaining the technical background of the REST API and its implementation in UCS.
During the implementation of the REST API, an exciting exchange took place between Univention and the developers at EGroupware GmbH in Kaiserslautern, Germany. As a result, EGroupware became the first solution to employ the new interface in the Univention App Center. In the second section of the article, Ralf Becker from EGroupware explains the implementation of the new API and the advantages it offers providers of third-party applications.

Interview with Dominik Fahrin, Special Service “Central Services and Data Processing”, City of Beckum

Logo Stadt Beckum
Mr. Fahrin, how many schools with how many students and teachers do you supervise?

In the city of Beckum we have a total of nine schools, six primary schools and three secondary schools. In addition, together with our neighboring town Ennigerloh, we also manage an intermunicipal comprehensive school. That means: around 4,500 pupils and around 650 teachers, although currently, we only manage the teachers with UCS@school.

Domain Replication Service (DRS) with Samba for Empowering Distributed Environments

In larger environments with thousands of users, you can often find multiple Domain Controller offering authentication and authorization services. For Windows-based endpoints, UCS utilizes Samba 4 to provide these services. In between the different Samba 4 servers, UCS uses the Domain Replication Service (DRS) to keep the server data synchronized. While Samba 4 does a superb job in replicating the data, there are some tweaks you can utilize to optimize the replication, to provide better performance in distributed environments. Let us have a look!

Provide Solutions for Home Office Team Collaboration

In recent days and weeks, many employees retreated to home office to break chains of infection, others plan or would like to do so. But not everyone has the tools to continue working productively and together with colleagues in as many areas as possible. Working remotely and the collaboration of several people from the home office place special demands on the way a team works and on the tools it uses.
As an open hyperintegration platform and with the Univention App Center, Univention Corporate Server (UCS) offers a whole range of different applications which enable effective and collaborative working from the home office. Among the more than 90 applications in the App Center are solutions for file sharing (Nextcloud, ownCloud or Seafile), for project management (OpenProject and the Kanban solution Wekan), video conference (Kopano Meet), real-time communication (Rocket.Chat) or knowledge transfer (MediaWiki Bluespice). All these solutions are also available as virtual appliances with a pre-configured UCS, which you can put into operation with a very manageable effort and make available to your colleagues for the home office.

The Way to the IT Concept For the Schools In the District of Harz

The district of Harz as a school authority recognized early, that a school has different needs than the public administration. Therefore the school IT is separated from the IT structure of the administrative district. Our structures enable us to remain flexible and to respond to the individual needs of the schools. A special school needs other applications and end devices than a grammar school. Nevertheless, both systems must be manageable and functional.

Web Proxy and “Shalla List” for Access Rules to External Websites and Higher Performance at the Same Time

For the IT administration of organizations with many users, typically also schools, it can be very useful to regulate the access to external websites. From a technical point of view, in order to improve performance when accessing frequently visited pages, but also in terms of restricting access to certain pages, e.g. for security reasons or to protect minors.
The web proxy, which is a central component of UCS@School, is used to improve performance and control data traffic. In this blog article I’ll show you how to configure Squid Proxy with SquidGuard and how to combine both with existing (youth protection) website filters. And with the “Shalla-List-Downloader” I would like to present you a Cool Solution, with which you can further round off this protection and which we have already successfully implemented in various school projects.

HowTo: Web-based Linux Terminal Server with 2FA

Timo Denissen of the Professional Service Team of Univention described in February with the blog article “Desktops with Guacamole remote control” how computers can be remote controlled via the browser. In this How To I would like to show how this principle can be extended with the help of privacyIDEA and xRDP to a terminal server environment which can be used completely in the browser, integrated into the domain of the UCS and secured by 2-factor authentication.
I assume in the HowTo that a functional UCS Master already exists. I run this virtualized using Proxmox. I use a second VM for the terminal server environment.
The following steps are described in detail in this HowTo:

  1. Prepare LinuxMint with xRDP
  2. Installing and configuring privacyIDEA and RADIUS on the UCS Master
  3. Integrate xRDP with privacyIDEA
  4. Install and configure Guacamole with RADIUS Plugin

Videoconferences at Univention

In times of telecommuting they have become indispensable: videoconferences.

Anyone who frequently participates in them knows that nothing is more disturbing than distorted scraps of conversation and lagging interlocutors. A flawless transmission, however, enables employees to focus on the essential topic and exchange information about it, even in a digital environment. It adds up to a good feeling keeping control of the data when discussing internal company information or when talking to customers.