Hey!
At my uni we have network license (auth code and serial number) for our computer labs for our students. We also have named user license for our teachers.
On this webpage → https://help.sketchup.com/en/troubleshooting/problems-connecting-internet
It says ports 5053 and 50530 needs to open for network license. But it also lists ports 80, 8888, 8080, and 443. What re those ports needed for exactly? You usually don’t want to have port 80 open.
Best regards