Host must block network traffic by default

MittelStufe 1Automatisiertvmware

Beschreibung

By default, the host is configured to block all incoming and outgoing network traffic, except for the traffic pertaining to services enabled in the host security profile. This configuration is pivotal in reducing the attack surface and averting unauthorized access to the host. The audit runs esxcli network firewall get and requires "Enabled: true" and "Default Action: DROP"; review enabled rulesets as well. Runs in the ESXi Shell (busybox sh) as root.

So wird geprüft

Prüfmethode: Shell-Befehl

shell

out=$(esxcli network firewall get 2>/dev/null) || exit 1
a=$(printf '%s\n' "$out" | sed -n 's/^ *Default Action: *//p' | head -n 1)
e=$(printf '%s\n' "$out" | sed -n 's/^ *Enabled: *//p' | head -n 1)
[ "$a" = DROP ] && [ "$e" = true ] && echo compliant || echo "firewall enabled=$e default action=$a"

Erwartete Ausgabe: compliant

So wird behoben

Behebungsmethode: Anleitung oder Infrastruktur-Patch

1. Enable the ESXi firewall if disabled and disable unnecessary rulesets. 2. Use: esxcli network firewall set --enabled true 3. Configure only the required rulesets for documented services.

Eigenschaften

Betriebssysteme: Beliebig
Tags: vmwareesxinetwork
Referenz: CIS VMware ESXi 9.0 Benchmark v1.0.0 - 5.2 Host must block network traffic by default

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shell

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