CHECK_ID_check311="" 
CHECK_TITLE_check311="" 
CHECK_SCORED_check311="" 
CHECK_TYPE_check311="" 
CHECK_ALTERNATE_check311="check311" 
 
check311(){
  # "Ensure a log metric filter and alarm exist for changes to Network Access Control Lists (NACL) (Scored)"
  textTitle "$ID311" "$TITLE311" "SCORED" "LEVEL2"
  CLOUDWATCH_GROUP=$($AWSCLI cloudtrail describe-trails $PROFILE_OPT --region $REGION --query 'trailList[*].CloudWatchLogsLogGroupArn' --output text | tr '	' '
' | awk -F: '{ print $7 }')
  if [[ $CLOUDWATCH_GROUP ]];then
    for group in $CLOUDWATCH_GROUP; do
      CLOUDWATCH_LOGGROUP_REGION=$($AWSCLI cloudtrail describe-trails $PROFILE_OPT --region $REGION --query 'trailList[*].CloudWatchLogsLogGroupArn' --output text | awk -F: '{ print $4 }')
      METRICFILTER_SET=$($AWSCLI logs describe-metric-filters --log-group-name $group $PROFILE_OPT --region $CLOUDWATCH_LOGGROUP_REGION --query 'metricFilters' | grep -E 'CreateNetworkAcl.*CreateNetworkAclEntry.*DeleteNetworkAcl.*DeleteNetworkAclEntry.*ReplaceNetworkAclEntry.*ReplaceNetworkAclAssociation')
      if [[ $METRICFILTER_SET ]];then
        HAS_ALARM_ASSOCIATED=$($AWSCLI cloudwatch describe-alarms $PROFILE_OPT --region $CLOUDWATCH_LOGGROUP_REGION --query 'MetricAlarms[].MetricName' --output text | awk 'BEGIN {IGNORECASE=1}; /NetworkAcl/;')
        if [[ $HAS_ALARM_ASSOCIATED ]];then
          textOK "CloudWatch group $group found with metric filters and alarms for changes to NACLs"
        else
          textWarn "CloudWatch group $group found with metric filters but no alarms associated"
        fi
      else
        textWarn "CloudWatch group $group found but no metric filters or alarms associated"
      fi
    done
  else
    textWarn "No CloudWatch group found for CloudTrail events"
  fi
}