Enable DNSSEC Validation

SrednjaNivo 1Automatskabind

Opis

DNS Security Extensions or DNSSEC for short provides authentication of the name servers through public key cryptography. With DNSSEC, the name server signs its responses with its private key. This allows other name servers that have the public key of the name server to verify the integrity and authenticity of the response. The audit fails when dnssec-validation or dnssec-enable is set to no (the BIND 9.11 defaults validate); the PDF also suggests the delv @127.0.0.1 isc.org "fully validated" test. 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).

Kako se proverava

Metod provere: Komanda ljuske

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' "$flat" | grep -Eq '[{; ]dnssec-validation no;' && { echo 'dnssec-validation no'; exit 1; }
printf '%s\n' "$flat" | grep -Eq '[{; ]dnssec-enable no;' && { echo 'dnssec-enable no'; exit 1; }
echo compliant

Očekivani izlaz: compliant

Kako se ispravlja

Metod ispravke: Smernica ili zakrpa infrastrukture

Perform the following for remediation: ; Check the BIND configuration files, and in the global options set the option dnssec- enable to yes, and option dnssec-validation to either yes or auto as shown below. The auto setting is generally preferred as the trust anchor will not need to be manually configured. dnssec-enable yes dnssec-validation auto ; Restart the named server.

Svojstva

Operativni sistemi: Bilo koji
Oznake: binddnsdnssec
Referenca: CIS ISC BIND DNS Server 9.11 Benchmark v1.0.0 - 7.2 Enable DNSSEC Validation

Proverite ovaj računar

Pokrenite ovo na računaru za koji imate dozvolu za proveru. Skeniranje radi u režimu samo za čitanje.

shell

tmaegis scan --target bind