Is it possible to change source IP to Interface?

Question

linux

Good day!
Please tell me, there is a postrouting rule:
iptables -A POSTROUTING -t nat -j SNAT --to-source 10.10.10.10
How can I specify an interface instead of source IP?
I will be very grateful for your help

Answer 1

Figured it out using:
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE