wiki SebMas

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1/ define vmbr1 in proxmox interface :

192.168.0.254
255.255.255.0

2/ execute in host :

Get access to the outside

iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -o vmbr0 -j SNAT --to xxx.xxx.xxx.xxx

get access from the outside

iptables -t nat -A PREROUTING -p tcp -d xxx.xxx.xxx.xxx --dport xxx -i vmbr0 -j DNAT --to-destination 192.168.0.1:xxx

or

iptables -t nat -A PREROUTING -p tcp -d xxx.xxx.xxx.xxx --dport 10000:10100 -i vmbr0 -j DNAT --to-destination 192.168.0.1
iptables -t nat -A PREROUTING -p udp -d xxx.xxx.xxx.xxx --dport 10000:10100 -i vmbr0 -j DNAT --to-destination 192.168.0.1

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