Network Bridge - Hetzner - Cant get it to work

[No1IrishStig]

Hi, I have been trying so many different things online. And I cannot get this to work. I want my VM's to have seperate IP's from the host through the bridge. But it isnt working.

Host IP: 138.201.142.159
Secondary IP: 138.201.142.151
Gateway: 138.201.142.129
Netmask: 255.255.255.192
Broadcast: 138.201.142.191

This is how it looks on the Network tab on Proxmox. Here is my etc/network/interfaces file for the host:

-----------------

On the VM, I was able to capture this as it flew by, im not sure which log file it is in to get the full thing.

For the /etc/network/interfaces file on the guest I have this configuration as guided by Hetzners own docs:

I am able to ping the host, and ping the guest from the host and get a response. However I cannot contact any outside servers with the guest.

Running `sudo apt-get update` responds with this:

I cant ping any servers outside, besides the host.


Please help! I am quite a newbie when it comes to networking and making bridges and stuff. So I might need a big extra explaination than your average joe. Thanks in advance!

 

[Moayad]

Hi,

on your VM could you please post output of cat /etc/resolv.conf

 

[No1IrishStig]

Im guessing this is a problem.

 

[Moayad]

Yep, try to put this nameserver in resolve.conf file

nameserver 213.133.100.100
nameserver 213.133.98.98
nameserver 213.133.99.99

then reboot the VM and try ping google.com, BTW the name server are from hetzner docs [1]

https://docs.hetzner.com/dns-console/dns/general/recursive-name-servers/

 

[No1IrishStig]

Yep, try to put this nameserver in resolve.conf file

nameserver 213.133.100.100
nameserver 213.133.98.98
nameserver 213.133.99.99

then reboot the VM and try ping google.com, BTW the name server are from hetzner docs [1]

https://docs.hetzner.com/dns-console/dns/general/recursive-name-servers/

Ill try it thanks!

 

[No1IrishStig]

Ill try it thanks!

I tried this but every time I reboot it resets the file back to default.

 

[Moayad]

what does say cat /etc/resolv.conf on your PVE host?

 

[No1IrishStig]

 

[Moayad]

please post the config for your VM qm config <VMID>

 

[No1IrishStig]

please post the config for your VM qm config <VMID>

 

[Moayad]

hi,

if your VM is just test, can you try the following instructions?

- edit file resolv.conf in Ubuntu VM, and put the nameserver for hetzner:

nameserver 213.133.100.100
nameserver 213.133.98.98
nameserver 213.133.99.99

then change attributes for resolv.conf file with command:
chattr +i /etc/resolv.conf
then reboot your VM, && ping -c 3 google.com,

if that not works

- try to edit /etc/network/interfaces in your Ubuntu VM and just add this lines after under gateway 138.201.142.129

dns-nameservers 213.133.100.100
dns-nameservers 213.133.98.98
dns-nameservers 213.133.98.99

Hopefully that help

 

[No1IrishStig]

hi,

if your VM is just test, can you try the following instructions?

- edit file resolv.conf in Ubuntu VM, and put the nameserver for hetzner:



then change attributes for resolv.conf file with command:
chattr +i /etc/resolv.conf
then reboot your VM, && ping -c 3 google.com,

if that not works

- try to edit /etc/network/interfaces in your Ubuntu VM and just add this lines after under gateway 138.201.142.129

dns-nameservers 213.133.100.100
dns-nameservers 213.133.98.98
dns-nameservers 213.133.98.99

Hopefully that help

Hi, firstly adding the name servers to the resolv file gave this:

The second thing, I added it to the network interface below gateway, and it doesnt change anything:

 

[diviaki]

I find it strange that vmbr0's and enp0s's address are the same with ports not bridged.
Also make sure to read this when bridging the host ethernet interface at Hetzner: https://docs.hetzner.com/robot/dedicated-server/network/net-config-debian/#bridged

 

[No1IrishStig]

I managed to get the VPS's working by adding a bridge port. But I've ran into a new issue.

After a period of time the hosts IP becomes unresponsive, after the host has not even been doing anything besides running 2 - 3 virtual machines. All of the VM's still have internet access and can be used, however the Host cannot. Anyone ever had this issue? Its very frustrating because each time I want to use the host I have to login through a guest then ssh into the host, then restart the networking service. Once the service has been restarted I can ssh into the host again, but then all the VM's die. Its a vicious loop. Please help!