Unable to get internet connection on fresh Proxmox install

[Thedan667]

Hello,

I have used proxmox before however this time on my new device. dell optiplex 3040m
I have removed the WiFi card.


When I log into root and try command /etc/network/interfaces I get told Permission denied, even though I am logged in under root.

cat /etc/network/interfaces


ip a


Not sure what else I can show. when I try to ping 8.8.8.8 clearly it doesn't work.

Would greatly appreciate the help!

 

[UdoB]

You can not have "address 192..." and gateway "10...."

The "gateway" MUST be in the SAME network as "address" is - it must be reachable without routing... ;-)

 

[janus57]

Hi,

The "gateway" MUST be in the SAME network as "address" is

Technically, it's false, you CAN have a gateway out of the network address, but you have to add "pointopoint 10.0.0.1" in this example (or "on-link: true
" with netplan).

Note : Generally this use case is for a system which has a /32 address or a small subnet, which is not the case here.

Best regards,

 

[UdoB]

Technically, it's false, you CAN have a gateway out of the network address,

There is a myriad of "tricks" you can build by using iptables, its routing tables, its chains and other tools.

When I see this type of mis-configuration I prefer to give a simple answer - possibly down to over-simplified. Sometimes it does not fit, but most times there is a newbie on the other end, with some lack of knowledge.