How to pass "Source UID" to iptables?

Question

Through command line, am setting firewall rules using iptable binary like below:

iptables -I PRIO_IN -p tcp -s "10.0.0.25/24" -d "10.0.0.26/24" -j ACCEPT

For above rule, now I need to add source uid.

In Iptables man page, am not seeing any option by name source uid

Answer 1

I'm thinking you're looking for the "owner" module for iptables. You'll find documentation under iptables-extensions (man iptables-extensions). (See here - https://ipset.netfilter.org/iptables-extensions.man.html#lbBP)

Note that it's only applicable on OUTPUT and POSTROUTING chains.

Good Luck!