Host must filter Bridge Protocol Data Unit (BPDU) packets

SedangLevel 1Otomatisvmware

Deskripsi

To prevent cascading lockout of uplink interfaces from the ESXi host, the Net.BlockGuestBPDU parameter can be set to 1, enabling BPDU Filter to drop BPDU packets sent from virtual machines to the physical switch. This is crucial as ESXi's Standard and Distributed Virtual Switches do not support STP, making them prone to network loops if BPDUs are unfiltered. The audit reads Net.BlockGuestBPDU with esxcli and requires 1. Runs in the ESXi Shell (busybox sh) as root.

Cara pemeriksaan

Metode audit: Perintah shell

shell

out=$(esxcli system settings advanced list -o /Net/BlockGuestBPDU 2>/dev/null) || exit 1
v=$(printf '%s\n' "$out" | awk '$1=="Int" && $2=="Value:" {print $3; exit}')
case "$v" in ''|*[!0-9-]*) echo '/Net/BlockGuestBPDU: no integer value'; exit 1 ;; esac
if [ "$v" -eq 1 ]; then echo compliant; else echo "/Net/BlockGuestBPDU = $v (expected 1)"; fi

Output yang diharapkan: compliant

Cara perbaikan

Metode perbaikan: Panduan atau patch infrastruktur

From an administrative PowerCLI session: Execute - Get-VMHost | Get-AdvancedSetting -Name Net.BlockGuestBPDU | Set- AdvancedSetting -Value 1 -Confirm:$false. Validate network appliances/virtual switching workloads before enforcing this setting.

Properti

Sistem operasi: Apa saja
Tag: vmwareesxinetwork
Referensi: CIS VMware ESXi 8.0 Benchmark v1.4.0 - 5.4 Host must filter Bridge Protocol Data Unit (BPDU) packets

Periksa host ini

Jalankan ini pada mesin yang diizinkan untuk Anda audit. Pemindaian bersifat hanya baca.

shell

tmaegis scan --target vmware