How to specify multiple interfaces for an iptables rule?

Question

Computer networks

Tell me, is it possible to specify several interfaces for a rule? For example:
iptables -A FORWARD -i eth0,eth1 -o eth2 -j ACCEPT
And if possible, how to separate? Through space, comma, slash?

Answer 1

You can do this and not list anything
iptables -A FORWARD -i eth0 -o eth2 -j ACCEPT
iptables -A FORWARD -i eth1 -o eth2 -j ACCEPT

Answer 2

iptables -A FORWARD -i eth+ -o eth2 -j ACCEPT
"Plus" will mean that the interface name starts with eth , and then anything goes.