![Error message "Could not start DNS service on <ip-address> port 53 UDP. Port is used by another application" or "Could not start DNS service (Error 10048)" Error message "Could not start DNS service on <ip-address> port 53 UDP. Port is used by another application" or "Could not start DNS service (Error 10048)"](https://simpledns.plus/kb/img/47/2.png)
Error message "Could not start DNS service on <ip-address> port 53 UDP. Port is used by another application" or "Could not start DNS service (Error 10048)"
![Your computer is not a black box - Understanding Processes and Ports on Windows by exploring - Scott Hanselman's Blog Your computer is not a black box - Understanding Processes and Ports on Windows by exploring - Scott Hanselman's Blog](https://hanselmanblogcontent.azureedge.net/Windows-Live-Writer/3aaa8d1c1288_12978/image_6e5c54a1-69b2-460c-8f5c-e6134f9b8c06.png)
Your computer is not a black box - Understanding Processes and Ports on Windows by exploring - Scott Hanselman's Blog
![Package(/NAS application) "DNS Server" needs PORT 53 to run, so it can run while installing Package, "Synology Directory Server" But Port 53 is taken - I never deal with ports, is this Package(/NAS application) "DNS Server" needs PORT 53 to run, so it can run while installing Package, "Synology Directory Server" But Port 53 is taken - I never deal with ports, is this](https://preview.redd.it/ow8ew36a62171.png?auto=webp&s=e6c38689cee3617f3230c95b382811343d39b376)