Node offline - Is it only 1 port i need to open 1.e 28967

When you said change the DNS, Was you referring to the host connection or the vm connection? I found another post about this which is another one i get maybe because of DNS settings. ERROR telemetry failed sending report: lookup collectora.storj.io: no such host
Here: Telemetry faild sending report: lookup collectora.storj.io no such host(solved)
But they also couldn’t ping, but i can from the vm. So why should it not be able to find the host?