proxmox_one_ip
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Tested on Proxmox 4.2
Basically you should have already a vmbr0 in your /etc/network/interfaces, which looks like that
auto vmbr0 iface vmbr0 inet static address 1.1.1.1 netmask 255.255.255.0 network 1.1.1.0 broadcast 1.1.1.255 gateway 1.1.1.254 (or something else as 254) bridge_ports eth0 bridge_stp off bridge_fd 0
You just need to add another bridge for your NAT Boxes:
auto vmbr2 iface vmbr2 inet static address 10.21.21.254 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 '10.21.21.0/24' -o vmbr0 -j MASQUERADE post-down iptables -t nat -D POSTROUTING -s '10.21.21.0/24' -o vmbr0 -j MASQUERADE
Restart your Network:
service networking restart
You also need to assign your VM's to vmbr2, example Network config for your VM's:
Gateway: 10.21.21.254 Netmask: 255.255.255.0 IP: 10.21.21.4
You can Forward one Port like this:
/sbin/iptables -t nat -A PREROUTING -i vmbr0 -p tcp --dport 1500 -j DNAT --to 10.21.21.4:22
or a Port range like that:
/sbin/iptables -t nat -A PREROUTING -i vmbr0 -p tcp --dport 1500:1600 -j DNAT --to 10.21.21.4
You can setup your own bash script with these commands and add it to the Startup.
proxmox_one_ip.1468751631.txt.gz · Last modified: 2021/11/25 22:43 (external edit)