Followed the instructions on the docs page for setting up the repo and then doing "nethserver-install" accordingly and all went well until I tried to use the Software Center. So it's Nethserver 7.3 running on a CentOS 7.3 server, which can otherwise connect to either https://xx.x.x.xx:980 or any other site via Firefox. But when I try yum update I get the "unreachable" errors and likewise when I try to ping google.com.
So, right now, I can get to any site using Firefox on the CentOS 7.3 server. But at command line, I can't even ping google.
yum repolist -v:
Same result as "yum update." Starts to list some things, and then becomes "unreachable" with a list of suggestions to "fix" it.
The other machine in the same room is also connected to the same router and the internet and is a Linux Mint 18 desktop. Nary a problem there.
I think I'm missing something really obvious here but don't know what it is: how is it that I can use Firefox on the CentOS box to connect anywhere on the net, but in the command-line, I can't even ping anybody?