hello how to access the file. /etc/network/interfaces

Go to the cli via ssh (putty) or via host console (via web-ui) and edit the file with nano /etc/network/interfaces
and after editing reload with ifreload -a
 
Here is my configuration why my vms and containers are not connected to the internet


auto lo
iface lo inet loopback

auto eno1
iface eno1 inet manual

iface eno2 inet manual

auto vmbr0
iface vmbr0 inet static
address 51.159.106.195/24
gateway 51.159.106.1
bridge-ports eno1
bridge-stp off
bridge-fd 0
hwaddress 44:a8:42:21:0b:36
 
Here is my configuration why my vms and containers are not connected to the internet


auto lo
iface lo inet loopback

auto eno1
iface eno1 inet manual

iface eno2 inet manual

auto vmbr0
iface vmbr0 inet static
address 51.159.106.195/24
gateway 51.159.106.1
bridge-ports eno1
bridge-stp off
bridge-fd 0
hwaddress 44:a8:42:21:0b:36
Are you sure eno1 is the correct cabled port? Could also be eno2 (depends on which cable is connected). I have never seen "hwaddress" in a vmbr0, you might try to remove that and see if it helps. How does the switch-configuration on the cabled port look like?