Selecting a Linux IPtables Output IP Address

You can use the following codes when using containers such as LXD, LXC, Docker, or if you want a device in the internal network to have a private exit IP address.

iptables -t nat -I POSTROUTING -s icip.ad.re.si/32 -j SNAT --to-source disip.ad.re.si
iptables-save > /etc/iptables/rules.v4