Network goes down

[MisterY]

Hi,
I freshly installed PBS on a Server, but everytime it boots the network adapter goes down.

If I make an "ip a", it tells me "enp4s0 xxx down". If I try to bring it up with "ifup enp4s0" it tells me "adapter enp4s0 not found" ?

What can I do?

 

[luca_merkle]

It happens to me either.
The difference is that network is up but only for outbound traffic.
No way to login to ssh or webgui on port 8007.

Definitely weird, never seen something like this.