Containers: not able to reach the internet!

[FireFox]

Dear experts,

For evaluation and test purposes, I installed proxmox on VirtualBox. The software specs are these:
- Proxmox 6.2.1
- VirtualBox 6.1.12
- The host is Windows 10
- Proxmox network mode: Bridged

The proxmox works fine and it reached to the internet.
I have tried to install on proxmox some LXCs... also to test them.

My issue is all the installed LXCs wont be able to connect to the internet!!
I am able to ping from the LXC to proxomx but I cant ping for example 8.8.8.8 form the LXCs.

I have tried different solutions and I searched on the internet but I couldn't fined the solution or maybe I didn't understand it.

I think I missed something here.

Please help and direct me to the solution.

Thank you

 

[Moayad]

Hi,

Please post your network configuration cat /etc/network/interfaces and config for one LXC Container pct config <VMID>

 

[FireFox]

Hi Moayad,

Thank you for your quick reply.

The proxmox network configuration is:
auto lo
iface lo inet loopback

iface enp0s3 inet manual

auto vmbr0
iface vmbr0 inet static
address 192.168.200.131
netmask 255.255.255.0
gateway 192.168.200.1
bridge_ports enp0s3
bridge_stp off
bridge_fd 0


The LXC container configuration is:
arch: amd64
cores: 1
hostname: unifi
memory: 2048
net0: name=eth0, bridge=vmbr0, firewall=1, hwaddr=xx:xx:xx:xx:xx:xx, ip=dhcp, type=veth
ostype: ubuntu
rootfs: local-lvm:vm-100-disk-0, size=8G
swap: 512
unprivilieged:1

 

[Moayad]

Hi again,

configs looks good, have you checked the resolv.conf if correct?

 

[FireFox]

This is a good sign

This is the resolv.conf:

search my.home
nameserver 192.168.200.1

 

[FireFox]

I can ping between both the proxmox and LXCs. But when I am pinging from the LXC to the internet or the local host machine (windows 10) it gives me unreachable connections!

I am sure there is a small configuration step that I need to do to solve this issue but unfortunately I don't know what it is.

 

[Moayad]

I am sure there is a small configuration step that I need to do to solve this issue but unfortunately I don't know what it is.

Ok please check your network configuration on virtualbox [1]

[1] https://pve.proxmox.com/wiki/Proxmox_VE_inside_VirtualBox#Network_Considerations

 

[FireFox]

Based on the attached link, and on the network configuration section:

I added two NIC adapters,
adapter 1: Host-only Adapter
adapter 2: NAT

When I did this, I cant log in to the proxmox from the web interface and also I cant ping to the internet or the host machine or vice versa.

Before, the proxmox network setting was on " Bridged adapter" mode and it was able to connect to the internet.

In addition to all of these, the VT-x/AMD-V, Nested Paging, PAE/NX and KVM paravirtualization are enabled.

Sorry brother but the issue still exist!!


I have tried also to download same system on MacOS Catalina and I faced exactly same issues.

 

[ManuelDAR]

Hola, ¿pudiste resolver este problema? Estoy pasando por lo mismo, excepto que mi proxmox lo virtualiza a través de hyper-v.

(Siga revisando otras publicaciones y descubrí que el problema es la suplantación de mac, y funcionó, también vi que funciona para vbox)