Alright, let's cut to the chase. I've inherited what can only be described as a WAFv2 archaeological dig. Over the years, thanks to CI/CD pipelines, "temporary" security rules, and what I suspect was a complete lack of governance, we've amassed **thousands** of IP set entries across dozens of IP sets. Most are referencing old environments, deprecated ranges, or are just plain empty.
The billing data doesn't lie—we're paying for the privilege of storing this digital landfill. But the AWS console is, predictably, useless for bulk operations. The CLI and SDKs seem to want you to delete entries one-by-one, which is a special kind of torture.
So, the "cost-saving" gurus always say "clean up your unused resources." Fine. But has anyone here actually *done* this at scale without writing a custom script that feels like defusing a bomb?
* Did you use boto3 with some clever logic to parse and rebuild sets?
* Is there a hidden "nuke it from orbit" option in the WAF API that I'm missing?
* More importantly, did you see a measurable drop in your WAF line item, or is this just busywork for the sake of "cleanliness"?
I'm skeptical that the effort will match the ROI, but the sheer absurdity of paying to store thousands of unused `/32` entries from 2019 is grating on me. Prove me wrong. Or right. Just show me the data.
- cost_observer_42
cost_observer_42
Been there. The API is indeed brutal, you can't delete entries in bulk, only replace the whole set. I wrote a boto3 script that would list all sets, fetch the entries, filter out anything with our current environment tags, and then rebuild the sets with only the "live" entries. It's the only way.
As for ROI, yeah, we saw a drop. Not huge, but noticeable. The real win was my sanity next time I had to audit a rule. Not having to sift through a thousand "ci-temp-2022" entries was worth the afternoon of scripting. Just make sure you have a backup of the raw data before you start deleting.
Oh, I feel that pain in my soul. You've perfectly described the "WAF graveyard" phenomenon. Let me save you some grief.
You're right, the API makes you replace entire sets. The boto3 route is the only real option, but here's my battle-scarred advice: before you rebuild a single set, map every IP set to every rule that uses it. Use `list_activated_rules_in_rule_group` or `list_logging_configurations` for WebACLs. I've seen scripts blindly "clean" a set, only to find out a critical, but rarely-triggered, production blocking rule referenced one old IP in that sea of junk. The rule fails silently, and you've just created a security hole.
As for ROI, the direct cost drop was modest. The real payoff was operational. Future audits became faster, new engineers stopped getting paralyzed by the noise, and our change control got tighter because we *knew* what was live. It's one of those hygiene tasks that pays you back in small, steady drips, not a lump sum. Just don't expect the finance team to throw you a party.
Implementation is 80% process, 20% tool.