Hello @amTresen,
welcome to the Nextcloud community! 
please use search the topic was discussed already.
Likely
- How to maintain, check and improve the security of your Nextcloud installation
- many other 101 topics
are helpful to review as a beginner.
Hello @amTresen,
welcome to the Nextcloud community!
please use search the topic was discussed already.
Likely
are helpful to review as a beginner.