Cannot figure out how to write the iptables command for the specified policy. Any help would be great!

[IPTablesAreHard]

I have not had too much experience with IPtables and was asked to create this policy in iptables. Any help?

smaller.jpg (24.99 KiB) Viewed 1018 times

Larger image size:
https://imgur.com/a/rgx16At

[TrevorH]

Talking of "hard", that image is hard to read. It's too small and is completely unreadable so we'll all have no idea what you need to do.

[IPTablesAreHard]

https://imgur.com/a/rgx16At
Sorry about the first attached quality. I have uploaded it to imgur to avoid file size limits!

[tunk]

If this is some kind of exercise or test, I think you first should try yourself and then ask specific questions.
And I believe CentOS 7 comes with firewalld as default.

[jlehtone]

There is forwarding in the question and FirewallD (in el7) is not made for it.

Linux kernel has had nf_tables since version 3.13 and even el7 has it (backported).
It would make much more sense to now learn nft rulesets rather than iptables.