@dev_team I found a bug that I can reproduce it two times with the ISO NS7.3 on a fresh Install.
when I installed the server, I decided to set a static IP in anaconda. After the installation I can find this
[root@tutu ~]# config show dns dns=configuration NameServers=184.108.40.206,fe80::fa1a:67ff:fe51:677c%eth0
Of course the server cannot resolve dns name, only the ping through IP is valid. The direct consequence is that your server has no internet