I’ve a strange issue, all internet connection works so far I can see correctly.
I can visit each website from my clients without an issue.
But around the half off my Radio stations didn’t work, and show me only the status buffering.
As soon I change the client DNS settings from my Univention DC, to 8.8.8.8.
All radio stations works as well!
Any Idea how I can solve this issue?
I’d start to check whether your UCS can resolve the domains in question. Tools like dig (see https://en.wikipedia.org/wiki/Dig_(command) ) and nslookup on machines where “dig” is not available can help.
If there are failures in name resolution it is necessary to know about the configuration of the DNS-backend (UCRV “dns/backend”, see http://docs.software-univention.de/manual-4.2.html#ip-config:dns:backend) and the forwarder settings (UCRV “dns/forwarder1” to “dns/forwarder3”, see http://docs.software-univention.de/manual-4.2.html#computers:Configuring_the_name_servers).
Thanks for your support the dns forwarder was the issue.