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

Support for security such as Firewalls and securing linux
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IPTablesAreHard
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Cannot figure out how to write the iptables command for the specified policy. Any help would be great!

Post by IPTablesAreHard » 2023/05/05 18:03:55

I have not had too much experience with IPtables and was asked to create this policy in iptables. Any help?
smaller.jpg
smaller.jpg (24.99 KiB) Viewed 852 times
Larger image size:
https://imgur.com/a/rgx16At
Last edited by IPTablesAreHard on 2023/05/05 19:46:48, edited 1 time in total.

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

Post by TrevorH » 2023/05/05 18:07:18

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.
CentOS 8 died a premature death at the end of 2021 - migrate to Rocky/Alma/OEL/Springdale ASAP.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are dead, do not use them.
Use the FAQ Luke

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

Post by IPTablesAreHard » 2023/05/05 19:46:28

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

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

Post by tunk » 2023/05/05 22:14:25

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.

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

Post by jlehtone » 2023/05/06 09:01:54

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.

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