[SOLVED] VMs don't have internet access - Need assistence

[hubeuR]

Hello there!
I rented a root server from Hetzner, installed Proxmox via. the rescue mode and worked pretty well so far.

The only problem I have right now (well, since 2 days and a lot of tutorials) is, that the VMs don't have internet access.
The configuration I use at etc/network/interfaces is:

###########################################
# Host-Adapter [IPv4]
auto lo
iface lo inet loopback
# device: enp0s31f6 (ethernet, port0, slot31, ..) << Change to your specific device
auto  enp0s31f6
iface enp0s31f6 inet static
       address   <Hetzner IPv4>
       netmask   <Hetzner Netmask>
       broadcast <Hetzner Broadcast>
       gateway   <Hetzner Gateway>
       up route add -net <Hetzner IPv4> netmask <Hetzner Netmask> gw <Hetzner Gateway> dev enp0s31f6
       post-up echo 1 > /proc/sys/net/ipv4/conf/enp0s31f6/proxy_arp

# Host-Adapter [IPv6]
iface enp0s31f6 inet6 static
       address   <Hetzner IPv6>
       netmask   128
       gateway   fe80::1
       up sysctl -p

# Guest-Network [NAT]
auto vmbr0
iface vmbr0 inet static
        address  10.10.10.1
        netmask  255.255.255.0
        bridge_ports none
        bridge_stp off
        bridge_fd 0
        post-up   echo 1 > /proc/sys/net/ipv4/ip_forward
        post-up   iptables -t nat -A POSTROUTING -s '10.10.10.0/24' -o enp0s31f6 -j MASQUERADE
        post-up   iptables -A FORWARD --in-interface vmbr0 -j ACCEPT
        post-down iptables -t nat -D POSTROUTING -s '10.10.10.0/24' -o enp0s31f6 -j MASQUERADE
        post-down iptables -D FORWARD --in-interface vmbr0 -j ACCEPT

###########################################

I also don't have an additional IP from Hetzner. (If that matters)
Every help is appreciated.

Thank you in advance and greetings from Germany

 

[tim]

Still having issues? If it's solved, you could share you solution so others can benefit from it as well.