To enable a basic auto-bhop on your own server, open the console and enter the following:

The most popular plugin for this is by coleo (available on AlliedModders). To install it:

Simple AutoHotkey (AHK) scripts and mouse macros generally do not trigger a VAC ban because they do not inject code into the game's memory. However, internal cheat software (.dll injectors) that features "Internal Bhop Hack" will result in a permanent VAC ban.

You likely are not using the server-side plugin correctly. The key benefit of the VSP is that it removes the "camera-shaking" effect that Valve added to jumping. If you see shaking, the plugin is not active.

In Left 4 Dead 2, bunny hopping is particularly effective for:

Bunny hopping (bhopping) in Left 4 Dead 2 is a technique that transforms movement from a leisurely jog into a high-speed, momentum-driven sprint, allowing survivors to outpace hordes, reach saferooms faster, or evade the Tank. While manual bhopping requires precise timing, streamlines this, allowing you to hold a single button to maintain speed.

Similarly, the video tutorial by “L4D2 AutoBhop Explained” strongly warns viewers:

: Launch the game, open the console ( ~ key), and type plugin_load autobhop . If successful, you’ll see a green confirmation message.

Example:

Jerky mouse movements will cause you to lose speed. Aim for a fluid, sweeping motion. Risks, Bans, and Anti-Cheat Rules

To run advanced auto-bhop scripts that require external plugins, you may need to launch the game in Launch Options