[SOLVED] Hetzner Proxmox /etc/network/interfaces for public and private ip

R

ropiecin

Renowned Member
May 7, 2015
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applying the following configuration

auto lo
iface lo inet loopback

iface enp2s0 inet manual

auto vmbr0
iface vmbr0 inet static
address [public IP]
hwaddress 44:XX:5X:DX:8X:20
netmask 255.255.255.255
pointopoint [public gateway IP]
gateway [public gateway IP]
bridge-ports enp2s0
bridge-stp off
bridge-fd 1

auto vmbr10
iface vmbr10 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 vmbr0 -j MASQUERADE
post-down iptables -t nat -D POSTROUTING -s ’10.10.10.0/24’ -o vmbr0 -j MASQUERADE

public network is working but the private network 10.10.10.0 doen't go outside to internet

where is the mistake?
someone can pls help me in order to solve?
 
That all looks fine to me - I have a similar setup on one of my servers
Code: 
auto lo
iface lo inet loopback

iface enp3s0f0 inet manual

auto vmbr0
iface vmbr0 inet static
        address xxx.xxx.xxx.162/24
        gateway xxx.xxx.xxx.254
        bridge-ports enp3s0f0
        bridge-stp off
        bridge-fd 0

auto vmbr1
iface vmbr1 inet static
        address 10.0.0.1/24
        bridge-ports none
        bridge-stp off
        bridge-fd 0

auto vmbr2
iface vmbr2 inet static
        address 10.0.10.1/24
        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 '10.0.0.1/24' -o vmbr0 -j MASQUERADE
post-down iptables -t nat -D POSTROUTING -s '10.0.0.1/24' -o vmbr0 -j MASQUERADE
post-up   iptables -t nat -A POSTROUTING -s '10.0.10.1/24' -o vmbr0 -j MASQUERADE
post-down iptables -t nat -D POSTROUTING -s '10.0.10.1/24' -o vmbr0 -j MASQUERADE
post-up   iptables -t nat -A PREROUTING -p tcp --dport 3389 -j DNAT --to 10.0.10.11:3389
post-down iptables -t nat -A FORWARD -p tcp --dport 3389 -j ACCEPT

The only obvious difference I can see is you have bridge-fd 1 where the default is bridge-fd 0

I assume that you have restarted the networking after making changes?
 
Last edited:
hi Bob and thanks for your answer!

what is the gateway using on client on vmbr1 and vmbr2?
 
Ahh you need to amend your iptables config as follows
post-up iptables -t nat -A POSTROUTING -s ’10.10.10.1/24’ -o vmbr0 -j MASQUERADE post-down iptables -t nat -D POSTROUTING -s ’10.10.10.1/24’ -o vmbr0 -j MASQUERADE
 
hi Bob,
quotes are invalid! The right one is the following:
iptables -t nat -A POSTROUTING -s '10.10.10.1/24' -o vmbr0 -j MASQUERADE

Now it's working fine!!!
 
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