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VMware ESXi

TMA-ESXI9-5.10

Host must restrict the use of Virtual Guest Tagging (VGT) on standard virtual switches

MittelStufe 1Automatisiertvmware

Beschreibung

When a port group is set to VLAN 4095 on standard virtual switches, it enables Virtual Guest Tagging (VGT), letting all network frames pass to the attached virtual machines (VMs) without altering the VLAN tags. This requires VMs to process VLAN information themselves via an 802.1Q driver. The audit lists standard port groups and fails any using VLAN ID 4095 (Virtual Guest Tagging); document the exception when VGT is required. Runs in the ESXi Shell (busybox sh) as root.

So wird geprüft

Prüfmethode: Shell-Befehl

shell
out=$(esxcli --formatter=csv network vswitch standard portgroup list 2>/dev/null) || exit 1
bad=$(printf '%s\n' "$out" | awk -F, 'NR==1 {for (i = 1; i <= NF; i++) {if ($i == "Name") n = i; if ($i == "VLANID") l = i}; next} n && l && $l == "4095" {print $n}')
[ -z "$bad" ] && echo compliant || { echo 'port groups on VLAN 4095 (VGT):'; printf '%s\n' "$bad"; }
Erwartete Ausgabe
compliant

So wird behoben

Behebungsmethode: Anleitung oder Infrastruktur-Patch

To set port groups to values other than 4095 and 0 unless VGT is required, perform the following: 1. From the vSphere Web Client, select the host. 2. Click Configure then expand Networking. 3. Select Virtual switches. 4. Expand the Standard vSwitch. 5. View the topology diagram of the switch, which shows the various port groups associated with that switch. 6. For each port group on the vSwitch, verify and record the VLAN IDs used. 7. If a VLAN ID change is needed, click the name of the port group in the topology diagram of the virtual switch. 8. Click the Edit settings option. 9. In the Properties section, enter an appropriate name in the Network label field. 10.

Eigenschaften

Betriebssysteme
Beliebig
Tags
vmwareesxinetwork
Referenz
CIS VMware ESXi 9.0 Benchmark v1.0.0 - 5.10 Host must restrict the use of Virtual Guest Tagging (VGT) on standard virtual switches

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