Bridge network no internet in container

[lebanaht95]

Hi.
I am new to Proxmox. Have newest (6.0) installed on a VPS, whose provider claim that they don't restrict MAC address and recommend to use bridge mode instead of route. I want to assign each container an own IPv4 but after trying many different configurations there is still no internet in container.


What I have tried:
- blog.no-panic.at/2016/08/09/proxmox-on-debian-at-hetzner-with-multiple-ip-addresses/
- sysorchestra.com/proxmox-5-on-hetzner-root-server-with-ipv4/
- And countless other. Both route and bridge.

VPS has 5 IPv4 xxx.xxx.20.93-xxx.xxx.20.97, same subnet and 1 /64 IPv6. Default setting of Proxmox below:
Proxmox /etc/network/interfaces:

auto lo
iface lo inet loopback
iface ens3 inet manual
auto vmbr0
iface vmbr0 inet static
        address  xxx.xxx.20.93
        netmask  255.255.254.0
        gateway  xxx.xxx.20.1
        bridge-ports ens3
        bridge-stp off
        bridge-fd 0

Container /etc/network/interfaces: (nothing in /etc/network/interfaces.d)

auto lo
iface lo inet loopback
iface lo inet6 loopback
# interfaces(5) file used by ifup(8) and ifdown(8)
# Include files from /etc/network/interfaces.d:
source-directory /etc/network/interfaces.d
auto eth0
iface eth0 inet static
        address xxx.xxx.20.94
        netmask 255.255.254.0
        gateway xxx.xxx.20.1

The whole weekend was spent, no hope ;(.

 

[Richard]

I am new to Proxmox. Have newest (6.0) installed on a VPS, whose provider claim that they don't restrict MAC address and recommend to use bridge mode instead of route. I want to assign each container an own IPv4 but after trying many different configurations there is still no internet in container.

AFAIK the mentioned - as others - provider does restrict MAC addresses (i.e. the virtual ones from containers are not accepted).

However, inspect packets sent from containers to internet via tcpdump, if they are sent to the router but not answered the provider blocks them. If they are simply to sent there is something else. Check your ip configuration in that case - note: container's interfaces have to be bridged to vmbr0 in that setup.

 

[lebanaht95]

AFAIK the mentioned - as others - provider does restrict MAC addresses (i.e. the virtual ones from containers are not accepted).

However, inspect packets sent from containers to internet via tcpdump, if they are sent to the router but not answered the provider blocks them. If they are simply to sent there is something else. Check your ip configuration in that case - note: container's interfaces have to be bridged to vmbr0 in that setup.

The Proxmox host works now. No change was made. It just work!