TMA-BIND-3.1

Ignore Erroneous or Unwanted Queries

OrtaDüzey 1Otomatikbind

Açıklama

BIND can be configured to ignore requests originating from specified network segments. This is accomplished by implementing the blackhole option in named.conf. It is recommended that this feature be implemented to ignore requests that originate outside of expected network segments. The audit requires a non-empty blackhole address list in the global options. The audit parses the effective configuration printed by named-checkconf -p (all include files resolved) from /etc/named.conf (RHEL; chroot /var/named/chroot is detected) or /etc/bind/named.conf (Debian/Ubuntu).

Nasıl denetlenir

Denetim yöntemi: Kabuk komutu

shell

if [ -f /var/named/chroot/etc/named.conf ]; then out=$(named-checkconf -t /var/named/chroot -p /etc/named.conf 2>/dev/null) || exit 1
else conf=/etc/named.conf; [ -f "$conf" ] || conf=/etc/bind/named.conf
  out=$(named-checkconf -p "$conf" 2>/dev/null) || exit 1; fi
flat=$(printf '%s\n' "$out" | tr '\t\n' '  ' | tr -s ' ')
opts=$(printf '%s\n' "$out" | awk '/^options[ \t]*\{/{f=1} f{print} f&&/^\};/{exit}' | tr '\t\n' '  ' | tr -s ' ')
printf '%s\n' "$opts" | grep -Eq '[{; ]blackhole \{ *[^} ]' && echo compliant || echo 'no blackhole list in options'

Beklenen çıktı: compliant

Nasıl düzeltilir

Düzeltme yöntemi: Kılavuz veya altyapı yaması

Add a blackhole option for multicast and link local addresses, and all private RFC 1918 addresses that are not being used. blackhole { // Private RFC 1918 addresses 10/8; 192.168/16; 172.16/12; // Multicast 224/8; // Link Local 169.254/16; };

Özellikler

İşletim sistemleri: Herhangi biri
Etiketler: binddnsaccess-control
Referans: CIS ISC BIND DNS Server 9.11 Benchmark v1.0.0 - 3.1 Ignore Erroneous or Unwanted Queries

Bu ana makineyi denetle

Bunu denetleme izniniz olan bir makinede çalıştırın. Tarama salt okunurdur.

shell

tmaegis scan --target bind