By Andrew Armstrong 
Add Custom Drivers to VMware vSphere in 2025
VMware vSphere 8.0 Update 2 rules virtualization in 2025, but some hardware, like Realtek NICs, still needs custom drivers, especially for homelabs. This guide walks you through injecting drivers into ESXi for modern setups.
Step 1: Gather Tools
Download the vSphere 8.0 U2 ISO from VMware Customer Connect (login required). Grab the latest ESXi-Customizer-PS script from GitHub and your driver VIB (e.g., Realtek’s net55-r8168 from VIBs Depot).
Step 2: Build the Custom ISO
In PowerShell 7.4, run:.\ESXi-Customizer-PS.ps1 -v80 -vib "net55-r8168-8.045a-napi.vib" -outDir "C:\CustomISO"
This merges the Realtek driver into the vSphere 8.0 ISO. Takes 5-10 minutes.
Step 3: Deploy
Burn the ISO to USB with Rufus 4.5, boot your server, and install as usual. Verify the NIC loads via esxcli network nic list in the ESXi shell: look for “r8168”.
2025 Context: Licensing Shift
Post-Broadcom acquisition (2023), free ESXi is gone. vSphere Essentials ($500/year) is the entry point in 2025: worth it for homelabs over hacky workarounds.
Check our PowerShell Disk Space Guide for monitoring tips.
Recommended: A USB Network Adapter
If your hardware’s built-in NIC isn’t on VMware’s compatibility list and you’d rather not mess with custom drivers at all, a well-supported USB-to-Ethernet adapter is often the simpler workaround for lab and home-lab boxes.
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Gear We Recommend
Running this in a home lab? Here’s the gear that keeps our test environment reliable.
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VMWare VIB Package for Additional Network Card Drivers is available as a free download.
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