---
title: "Discussion on \"The Firewall That Was Never On — CSF Test Mode and 150 Full Apache Workers\" | Hashnode"
description: "Discussion on \"The Firewall That Was Never On — CSF Test Mode and 150 Full Apache Workers\". CSF in Test Mode means no firewall at all. A 2-second scanner burst filled 150 Apache workers. How to check TESTING, set CONNLIMIT and verify lfd."
url: "https://hashnode.com/posts/the-firewall-that-was-never-on-csf-test-mode-and-150-full-apache-workers/6ad8f3df7fbfa6664a27adb0"
---

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# [The Firewall That Was Never On — CSF Test Mode and 150 Full Apache Workers](https://quabin.hashnode.dev/the-firewall-that-was-never-on-csf-test-mode-and-150-full-apache-workers?utm_source=hashnode&utm_medium=feed)

CSF in Test Mode means no firewall at all. A 2-second scanner burst filled 150 Apache workers. How to check TESTING, set CONNLIMIT and verify lfd.

Oct 21 · 12 min read · quabin.hashnode.dev  
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-   [#linux](https://hashnode.com/tag/linux)
-   [#security](https://hashnode.com/tag/security)
-   [#apache](https://hashnode.com/tag/apache)
-   [#cpanel](https://hashnode.com/tag/cpanel)

## Written by

[Daanial Farrukh](https://hashnode.com/@daanial)

@daanial

  
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