Proxmox auf Server mit Public-IP

.....
auto vmbr1
iface vmbr1 inet static
        address 10.0.0.0/16
        bridge-ports none
        bridge-stp off
        bridge-fd 0
# NAT Settings
        post-up   echo 1 > /proc/sys/net/ipv4/ip_forward #schaltet das routing ein
        post-up   iptables -t nat -A POSTROUTING -s 10.0.0.0/16 -o vmbr0 -j MASQUERADE
        post-down iptables -t nat -D POSTROUTING -s 10.0.0.0/16 -o vmbr0 -j MASQUERADE
        post-up   iptables -t raw -I PREROUTING -i fwbr+ -j CT --zone 1
        post-down iptables -t raw -D PREROUTING -i fwbr+ -j CT --zone 1


# Portforwarding z. B. zu einem Reverse Proxy

# HTTP/S
      post-up   iptables -t nat -A PREROUTING -i vmbr0 -p tcp --dport 80 -j DNAT --to-destination 10.0.0.3
      post-down iptables -t nat -D PREROUTING -i vmbr0 -p tcp --dport 80 -j DNAT --to-destination 10.0.0.3
      post-up   iptables -t nat -A PREROUTING -i vmbr0 -p tcp --dport 443 -j DNAT --to-destination 10.0.0.3
      post-down iptables -t nat -D PREROUTING -i vmbr0 -p tcp --dport 443 -j DNAT --to-destination 10.0.0.3

# Routing in andere Netze 
     post-up ip route add 192.168.1.0/24 via 10.0.0.2 # z. B. über einen VPN in dein Netz Büro/Zuhause