Configure a Logging File Channel

보통레벨 1자동bind

설명

To capture logs to a local file, setup a channel for the file, in the logging configuration section. It's often helpful to have one log file for security related logs, and a second one with a dynamic severity level to be used as needed for debugging. The audit requires a logging channel with a file destination. 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).

점검 방법

감사 방식: 셸 명령

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 'channel "?[^ ]+"? \{[^}]*[{; ]file "' && echo compliant || echo 'no logging file channel'

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

In named.conf, configure a channel for a local security log file with the categories config, dnssec, network, security, updates, xfer-in and xfer-out. The local log file will be within the chroot directory. logging { . . . channel local_security_log { file "/var/run/named/secure.log" versions 10 size 20m; severity debug; print-time yes; }; // Config file processing category config { local_security_log; }; // Processing signed responses category dnssec { local_security_log; }; // Network Operations category network { local_security_log; }; // Approved or unapproved requests category security { local_security_log; }; // dynamic updates category update { local_security_log; }

속성

운영 체제: 모두
태그: binddnsoperations
참고 자료: CIS ISC BIND DNS Server 9.11 Benchmark v1.0.0 - 9.2 Configure a Logging File Channel

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shell

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