Host must filter Bridge Protocol Data Unit (BPDU) packets

OrtaDüzey 1Otomatikvmware

Açıklama

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.

Nasıl denetlenir

Denetim yöntemi: Kabuk komutu

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

Beklenen çıktı: compliant

Nasıl düzeltilir

Düzeltme yöntemi: Kılavuz veya altyapı yaması

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.

Özellikler

İşletim sistemleri: Herhangi biri
Etiketler: vmwareesxinetwork
Referans: CIS VMware ESXi 9.0 Benchmark v1.0.0 - 5.4 Host must filter Bridge Protocol Data Unit (BPDU) packets

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shell

tmaegis scan --target vmware