Frequently asked questions quickly answered.

You have questions about JusProgDNS? In this FAQ we answer frequently asked questions about the JusProgDNS youth protection program of JusProg e.V..


What is the JusProgDNS parental control program?2022-12-14T17:03:41+02:00

The JusProgDNS youth protection program is a system that parents, teachers, other guardians as well as network administrators ind schools and organizations can use to protect children and young people from content on the Internet that may be harmful to their development.

The JusProgDNS youth protection program is based on a youth protection filter in the name server, which can be deployed by making the appropriate entry in the configuration of almost any Internet-enabled device. While the children and teenagers are surfing the Internet, JusProgDNS checks in the background whether the accessed content (domain, subdomain) is appropriate for the age group. Accordingly, the websites are displayed or blocked by JusProgDNS.

The filter lists are permanently updated automatically, parents and administrators do not have to worry about this. The filter lists are located on the JusProg server. The software “asks” there during surfing of the child protected by JusProgDNS in each case for which age group a called web page is suitable. In addition, the entries of the parents / administrators in the admin area of JusProgDNS (white / black lists) as well as provider identifiers of the websites (age-de.xml / age.xml) are taken into account.


How big is my school?2022-12-14T17:08:16+02:00

The grouping of the school size (small, medium, larger, large) for Premium usage is based on the number of name server queries per month. Understandably, this is not easy to estimate in advance – even for us. After all, in addition to the number of SuS, a key factor is how “digital in practice” everyday school life is and whether a pupils WLAN is offered. Notes from our experience:

“Small school” – these are usually elementary schools where computer use is not part of everyday teaching. The class computer is turned on occasionally, the whiteboard is not a central instructional element, and perhaps there is a computer lab for 4th graders, but it is not used all the time either.

“Middle school” – these are mostly secondary schools up to grade 10 of middle size. Depending on how digital the teaching practice is, this contingent is usually about enough for a maximum of 300 to 500 SuS, but not for a student WLAN.

“Larger school” – secondary schools up to high school often fall into this category. Schools that tend to be medium-sized also sometimes need a “larger” or “large” contingent if the daily school routine is heavily digital.

“Large school” – schools with student WLAN and/or schools with a strong digital influence and many students (from approx. 800, but varies greatly depending on “digitization”) belong in most cases in this category. If you choose this category, you have two more advantages: 1.) significantly lower risk that you have to “rebook” because of too many accesses, which is often tedious accounting in school administrations 2.) you support JusProg ;-), even if in practice it should perhaps be a little less accesses.

We do not simply switch you off

As a premium user:in you will get an automatic prewarning mail (to the mail address stored in the account) at about 75% of the used quota that your quota is largely used up and you can react in time and order a higher grouping. Feel free to contact us via the contact form and together we will make sure that your school does not go offline in the meantime – otherwise, however, for security reasons the NS queries would be rejected for the time being when 100% of the quota is reached.


What are IP addresses?2022-12-14T16:52:04+02:00

IP addresses are similar to postal codes on the Internet. They are used to ensure that web page calls by Internet users find their way to the provider’s server and the data that make up the web pages find their way to the user’s terminal device.


age.xml / age-de.xml clear cache2022-12-14T17:10:16+02:00

Age classifications of websites by providers in age.xml or age-de.xml format are cached by JusProgDNS to speed up frequent queries of the same domains.

If you want to develop and test an age.xml / age-de.xml for your website, the cache can be a hindrance. Therefore, you can specifically clear the cache for individual domains. To do this, call up the following URL and enter the FQDN to be cleared (without www. and without https:// or https://).


Please use this developer function only for your own domains.

Note: The nameserverbased JusProgDNS can technically only filter whole FQDN, but cannot do single page filtering and cannot read HTTPHEADER. If you want to test single URL classification in age-de.xml, e.g. the JusProg software for Windows is recommended or also the iOS app of JusProg.

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