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this post was submitted on 19 Oct 2024
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We probably need more details as to what exactly you're attempting to accomplish and how you're attempting to accomplish it.
The main issue is that each rule you add to a firewall has a performance penalty: each packet is checked against each rule before it's passed.
Ten rules require 10x more cpu than 1 rule, 100 rules need 10x more than 10 rules, and so on.
Depending on how much traffic and how many rules we're talking about and what kind of expectation you have for performance as well as anything else (eg. vpn endpoint), "small and cheap" may not be fast enough, and you might have to lean into higher performance hardware.