From f8a938d365fe8256ae80e2157b9e49625b8bd1b0 Mon Sep 17 00:00:00 2001
From: Christoph <ckubu@oopen.de>
Date: Sun, 14 Feb 2021 02:59:31 +0100
Subject: [PATCH] Add script 'get_sites_with_external_nameservers.sh'.

---
 ...ites_with_external_nameservers.conf.sample |  15 +
 get_sites_with_external_nameservers.sh        | 734 ++++++++++++++++++
 2 files changed, 749 insertions(+)
 create mode 100644 conf/get_sites_with_external_nameservers.conf.sample
 create mode 100755 get_sites_with_external_nameservers.sh

diff --git a/conf/get_sites_with_external_nameservers.conf.sample b/conf/get_sites_with_external_nameservers.conf.sample
new file mode 100644
index 0000000..56d0ab0
--- /dev/null
+++ b/conf/get_sites_with_external_nameservers.conf.sample
@@ -0,0 +1,15 @@
+## ========================================================================
+## - Configuration File for Script "get_sites_with_external_nameservers.sh"
+## ========================================================================
+
+# INTERNAL_NS_SERVER
+#
+# Variable contins your own Nameservers
+#
+# Example:
+#    INTERNAL_NS_SERVER="a.ns.oopen.de b.ns.oopen.de"
+#
+# Blank separated list of nameservers
+#
+#INTERNAL_NS_SERVER=""
+
diff --git a/get_sites_with_external_nameservers.sh b/get_sites_with_external_nameservers.sh
new file mode 100755
index 0000000..b32c169
--- /dev/null
+++ b/get_sites_with_external_nameservers.sh
@@ -0,0 +1,734 @@
+#!/usr/bin/env bash
+
+script_name="$(basename $(realpath $0))"
+working_dir="$(dirname $(realpath $0))"
+
+conf_file="${working_dir}/conf/${script_name%%.*}.conf"
+
+log_file="$(mktemp)"
+random_prefix="$(head -c 300 /dev/urandom | tr -cd 'a-zA-Z0-9' | head -c  8)"
+
+backup_date=$(date +%Y-%m-%d-%H%M)
+
+
+# =============
+# --- Some Variables
+# =============
+
+NEED_APACHE_INFO=false
+NEED_INTERNAL_NAME_SERVER=false
+
+DEFAULT_HTTP_USER="www-data"
+DEFAULT_HTTP_GROUP="www-data"
+
+declare -a site_names_arr
+declare -a sites_external_ns_servers
+declare -a internal_ns_server_arr
+
+# =============
+# --- Some Functions
+# =============
+
+clean_up() {
+
+   # Perform program exit housekeeping
+   rm -f $log_file
+   rm -rf /tmp/*.${random_prefix}
+   blank_line
+   exit $1
+}
+
+echononl(){
+   if $terminal ; then
+      echo X\\c > /tmp/shprompt$$
+      if [ `wc -c /tmp/shprompt$$ | awk '{print $1}'` -eq 1 ]; then
+         echo -e -n "\033[4G[ \033[5m\033[1m....\033[m ]\033[13G$*\\c" 1>&2
+      else
+         echo -e -n "\033[4G[ \033[5m\033[1m....\033[m ]\033[13G$*" 1>&2
+      fi
+      rm /tmp/shprompt$$
+   fi
+}
+echoprompt(){
+   if $terminal ; then
+      echo X\\c > /tmp/shprompt$$
+      if [ `wc -c /tmp/shprompt$$ | awk '{print $1}'` -eq 1 ]; then
+         echo -e -n "\033[4G$*\\c" 1>&2
+      else
+         echo -e -n "\033[4G$*" 1>&2
+      fi
+      rm /tmp/shprompt$$
+   fi
+}
+echo_done() {
+   if $terminal ; then
+      echo -e "\033[4G[ \033[1;32mdone\033[m ]"
+   fi
+}
+echo_ok() {
+   if $terminal ; then
+      echo -e "\033[4G[ \033[1;32mok\033[m ]"
+   fi
+}
+echo_ignore() {
+   if $terminal ; then
+      echo -e "\033[4G[ \033[1;33mignore\033[m ]"
+   fi
+}
+echo_warning() {
+   if $terminal ; then
+      echo -e "\033[4G[ \033[1;33m\033[1mwarn\033[m ]"
+   fi
+}
+echo_failed(){
+   if $terminal ; then
+      echo -e "\033[4G[ \033[1;31mfail\033[m ]"
+   fi
+}
+echo_skipped() {
+   if $terminal ; then
+      echo -e "\033[4G[ \033[1;37mskip\033[m ]"
+   fi
+}
+echo_wait(){
+   if $terminal ; then
+      echo -en "\033[4G[ \033[5m\033[1m...\033[m ]"
+   fi
+}
+fatal (){
+   blank_line
+   if $terminal ; then
+      echo ""
+      echo -e "\033[1m---\033[m"
+      echo ""
+      echo -e "[ \033[31m\033[1mFatal\033[m ]: \033[37m\033[1m$*\033[m"
+      echo ""
+      echo -e "\033[31m\033[1m           Script will be interrupted..\033[m\033[m"
+   else
+      echo ""
+      echo "---"
+      echo ""
+      echo "fatal: $*"
+      echo "Script will be interrupted.."
+   fi
+   clean_up 1
+}
+error(){
+   blank_line
+   if $terminal ; then
+      echo -e "  [ \033[31m\033[1mFehler\033[m ]: $*"
+   else
+      echo ""
+      echo "[ Error ]: $*"
+      echo ""
+   fi
+   blank_line
+}
+
+warn (){
+   if $terminal ; then
+      echo ""
+      echo -e "  [ \033[33m\033[1mWarning\033[m ]: $*"
+      echo ""
+   fi
+}
+
+info (){
+   if $terminal ; then
+      echo ""
+      echo -e "  [ \033[32m\033[1mInfo\033[m ]: $*"
+      echo ""
+   fi
+}
+
+## - Check if a given array (parameter 2) contains a given string (parameter 1)
+## -
+containsElement () {
+   local e
+   for e in "${@:2}"; do [[ "$e" == "$1" ]] && return 0; done
+   return 1
+}
+
+trim() {
+    local var="$*"
+    var="${var#"${var%%[![:space:]]*}"}"   # remove leading whitespace characters
+    var="${var%"${var##*[![:space:]]}"}"   # remove trailing whitespace characters
+    echo -n "$var"
+}
+blank_line() {
+   if $terminal ; then
+      echo ""
+   fi
+}
+
+
+
+# =============
+# --- Jobhandling
+# =============
+
+# - Run 'clean_up' for signals SIGHUP SIGINT SIGTERM
+# -
+trap clean_up SIGHUP SIGINT SIGTERM
+
+
+# =============
+# --- Some Checks
+# =============
+
+# - Running in a terminal?
+# -
+if [[ -t 1 ]] ; then
+   terminal=true
+else
+   terminal=false
+fi
+
+
+# ==========
+# - Begin Main Script
+# ==========
+
+# ----------
+# - Headline
+# ----------
+
+if $terminal ; then
+   echo ""
+   echo -e "\033[1m----------\033[m"
+   echo -e "\033[32m\033[1mRunning script \033[m\033[1m$script_name\033[32m .. \033[m"
+   echo -e "\033[1m----------\033[m"
+   echo ""
+else
+   echo ""
+   echo "----------"
+   echo "Running script '$script_name'.."
+   echo "----------"
+   echo ""
+fi
+
+
+
+# ----------
+#  Read Configurations from $conf_file
+# ----------
+
+if [[ -f "$conf_file" ]]; then
+   source "$conf_file"
+else
+   warn "No configuration file '$conf_file' present.\n
+             Loading default values.."
+fi
+
+[[ -z "$INTERNAL_NS_SERVER" ]] && NEED_INTERNAL_NAME_SERVER=true
+
+
+
+
+echononl "Determin httpd binary .."
+_httpd_binary="$(which httpd)"
+if [[ -z "$_httpd_binary" ]] ; then
+   _httpd_binary="$(which apache2)"
+   if [[ -n "$_httpd_binary" ]] ; then
+      [[ -f "/etc/apache2/envvars" ]] && source "/etc/apache2/envvars"
+   fi
+fi
+if [[ -z "$_httpd_binary" ]]; then
+   _httpd_binary="$(ps -axu | grep httpd |  grep -e "^root" | grep -v grep | awk '{print$11}')"
+   if [[ -z "$_httpd_binary" ]]; then
+      if [[ -x "/usr/local/apache2/bin/httpd" ]]; then
+         _httpd_binary="/usr/local/apache2/bin/httpd"
+         echo_done
+      else
+         echo_failed
+         fatal "Apache2 installation not found!"
+      fi
+   else
+      echo_done
+   fi
+else
+   echo_done
+fi
+HTTPD_COMMAND="$_httpd_binary"
+
+
+echononl "Determin websevers user/group.."
+HTTP_USER="$($_httpd_binary -t -D DUMP_RUN_CFG | grep -i -e "^User" | awk '{print$2}' | cut -d"=" -f2 | tr -d '"')"
+if [[ $? -gt 0 ]]; then
+   echo_failed
+   NEED_APACHE_INFO=true
+else
+   HTTP_GROUP="$($_httpd_binary -t -D DUMP_RUN_CFG | grep -i -e "^Group" | awk '{print$2}' | cut -d"=" -f2 | tr -d '"')"
+   if [[ $? -gt 0 ]]; then
+      echo_failed
+      NEED_APACHE_INFO=true
+   else
+      if [ -z "$HTTP_USER" -o -z "$HTTP_GROUP" ]; then
+         echo_failed
+         NEED_APACHE_INFO=true
+      else
+         echo_done
+      fi
+   fi
+fi
+
+
+echononl "Determin Apache2 version number.."
+APACHE_VERSION="$(trim $($HTTPD_COMMAND -v | head -1 | cut -d ":" -f2))"
+if [[ $? -gt 0 ]]; then
+   echo_failed
+else
+   echo_done
+fi
+
+
+echononl "Determin ServerRoot Directory.."
+APACHE_SERVER_ROOT="$($_httpd_binary -t -D DUMP_RUN_CFG | grep ServerRoot | awk '{print$2}' | tr -d '"')"
+if [[ $? -gt 0 ]]; then
+   echo_failed
+   NEED_APACHE_INFO=true
+else
+   if [[ -z "$APACHE_SERVER_ROOT" ]]; then
+      if [[ -d "$(realpath "/usr/local/apache2/bin")" ]] \
+         && [[ "$(realpath "$(dirname "$_httpd_binary")")" = $(realpath /usr/local/apache2/bin) ]]; then
+         echo_done
+         APACHE_SERVER_ROOT="/usr/local/apache2"
+      else
+         echo_failed
+         NEED_APACHE_INFO=true
+      fi
+   else
+      echo_done
+      if [[ "$(realpath "/usr/local/apache2")" = "${APACHE_SERVER_ROOT}" ]] ; then
+         APACHE_SERVER_ROOT="/usr/local/apache2"
+      fi
+   fi
+fi
+
+
+echononl "Determin VHost directory.."
+if [[ -d "${APACHE_SERVER_ROOT}/sites-enabled" ]]; then
+   APACHE_VHOST_DIR="${APACHE_SERVER_ROOT}/sites-enabled"
+elif [[ -d "${APACHE_SERVER_ROOT}/conf/vhosts" ]]; then
+   APACHE_VHOST_DIR="${APACHE_SERVER_ROOT}/conf/vhosts"
+fi
+if [[ -n "${APACHE_VHOST_DIR}" ]] ; then
+   echo_done
+else
+   echo_failed
+   NEED_APACHE_INFO=true
+fi
+
+if $NEED_INTERNAL_NAME_SERVER && $terminal ; then
+   echo ""
+   echo -e "\033[32m--\033[m"
+   echo ""
+   echo "Insert (your) nameservers the sites will be checked against..."
+   echo ""
+   echo "   Give a blank separated list of nameserver names."
+   echo ""
+   echo ""
+   INTERNAL_NS_SERVER=
+   if [ -z "$INTERNAL_NS_SERVER" ]; then
+      echoprompt "Insert your nameservers: "
+      read INTERNAL_NS_SERVER
+      while [ "X$INTERNAL_NS_SERVER" = "X" ] ; do
+         echo -e "\n\t\033[33m\033[1mEntering the Naserver (s) is required .\033[m\n"
+         echoprompt "Insert your nameservers: "
+         read INTERNAL_NS_SERVER
+      done
+
+   fi
+fi
+for _ns_server in $INTERNAL_NS_SERVER ; do
+   internal_ns_server_arr+=("$_ns_server")
+done
+
+if $NEED_APACHE_INFO && $terminal ; then
+
+   echo ""
+   echo ""
+   echo -e "\033[32m--\033[m"
+   echo ""
+   echo "Give Apache ServerRoot directory."
+   echo ""
+   echo ""
+
+   if [[ -n "$APACHE_SERVER_ROOT" ]]; then
+      DEFAULT_APACHE_SERVER_ROOT="$APACHE_SERVER_ROOT"
+      APACHE_SERVER_ROOT=""
+   fi
+
+   if [[ -n "$DEFAULT_APACHE_SERVER_ROOT" ]] ; then
+      echoprompt "Apache2 ServerRoot directory: [${DEFAULT_APACHE_SERVER_ROOT}]: "
+      read APACHE_SERVER_ROOT
+      [[ -z $APACHE_SERVER_ROOT  ]] && APACHE_SERVER_ROOT="$DEFAULT_APACHE_SERVER_ROOT"
+   else
+      while [[ -z "$APACHE_SERVER_ROOT" ]] ; do
+         echoprompt "Apache2 ServerRoot directory: "
+         read APACHE_SERVER_ROOT
+         if [[ -z "$(trim "$APACHE_SERVER_ROOT")" ]] ; then
+            echo -e "\n\033[4G\033[33m\033[1mApache2 ServerRoot directory is required!\033[m\n"
+            echoprompt "Apache2 ServerRoot directory: "
+         elif [[ ! -d "$(trim "$APACHE_SERVER_ROOT")" ]] ; then
+            echo -e "\n\033[4G\033[33m\033[1mDirectory '$(trim "$APACHE_SERVER_ROOT")' not found!\033[m\n"
+            APACHE_SERVER_ROOT=""
+            echoprompt "Apache2 ServerRoot directory: "
+         fi
+      done
+   fi
+
+   echo ""
+   echo ""
+   echo -e "\033[32m--\033[m"
+   echo ""
+   echo "Give Apache VHost directory."
+   echo ""
+   echo ""
+
+   if [[ -n "$APACHE_VHOST_DIR" ]]; then
+      DEFAULT_APACHE_VHOST_DIR="$APACHE_VHOST_DIR"
+      APACHE_VHOST_DIR=""
+   fi
+
+   if [[ -n "$DEFAULT_APACHE_VHOST_DIR" ]] ; then
+      echoprompt "Apache2 VHost directory: [${DEFAULT_APACHE_VHOST_DIR}]: "
+      read APACHE_VHOST_DIR
+      [[ -z $APACHE_VHOST_DIR  ]] && APACHE_VHOST_DIR="$DEFAULT_APACHE_VHOST_DIR"
+   else
+      while [[ -z "$APACHE_VHOST_DIR" ]] ; do
+         echoprompt "Apache2 VHost directory: "
+         read APACHE_VHOST_DIR
+         if [[ -z "$(trim "$APACHE_VHOST_DIR")" ]] ; then
+            echo -e "\n\033[4G\033[33m\033[1mApache2 ServerRoot directory is required!\033[m\n"
+            echoprompt "Apache2 VHost directory: "
+         elif [[ ! -d "$(trim "$APACHE_VHOST_DIR")" ]] ; then
+            echo -e "\n\033[4G\033[33m\033[1mDirectory '$(trim "$APACHE_VHOST_DIR")' not found!\033[m\n"
+            APACHE_VHOST_DIR=""
+            echoprompt "Apache2 VHost directory: "
+         fi
+      done
+   fi
+
+
+   if [[ -n "$HTTP_USER" ]]; then
+      DEFAULT_HTTP_USER="$HTTP_USER"
+      HTTP_USER=""
+   fi
+
+   if [[ -n "$HTTP_GROUP" ]]; then
+      DEFAULT_HTTP_GROUP="$HTTP_GROUP"
+      HTTP_GROUP=""
+   fi
+
+   echo ""
+   echo ""
+   echo -e "\033[32m--\033[m"
+   echo ""
+   echo "Insert User/Group of apache2 daemon (httpd)."
+   echo ""
+   echo ""
+
+   echoprompt "Apache2 user [${DEFAULT_HTTP_USER}]: "
+   read HTTP_USER
+   [[ -z $HTTP_USER  ]] && HTTP_USER="${DEFAULT_HTTP_USER}"
+
+   echoprompt "Apache2 group [${DEFAULT_HTTP_USER}]: "
+   read HTTP_GROUP
+   [[ -z $HTTP_GROUP ]] && HTTP_GROUP="${DEFAULT_HTTP_GROUP}"
+
+fi
+
+
+
+if $terminal ; then
+   echo ""
+   echo ""
+   echo -e "\033[4G\033[33m\033[1mApache2 Info:\033[m"
+   echo -e "\033[4G\033[33m\033[1m=============\033[m"
+   echo ""
+
+
+   if [[ -n $APACHE_VERSION ]]; then
+      echo -e "\033[4GApache2 version..................: $APACHE_VERSION"
+   else
+      echo -e "\033[4GApache2 version..................: \033[33m-- could not be determined --\033[m"
+   fi
+   echo ""
+   if [[ -n "$APACHE_SERVER_ROOT" ]] ; then
+      echo -e "\033[4GApache2 Root Directory...........: $APACHE_SERVER_ROOT"
+   else
+      echo -e "\033[4GServer Root Directory............: \033[33m-- could not be determined --\033[m"
+   fi
+   echo ""
+   if [[ -x "$HTTPD_COMMAND"  ]] ; then
+      echo -e "\033[4GApache2 daemon ..................: $HTTPD_COMMAND"
+   else
+      echo -e "\033[4GApache2 daemon ..................: \033[33m-- could not be determined --\033[m"
+   fi
+   echo ""
+   if [[ -n "${APACHE_VHOST_DIR}" ]] ; then
+      echo -e "\033[4GApache2 VHost directory..........: $APACHE_VHOST_DIR"
+   else
+      echo -e "\033[4GApache2 VHost directory..........: \033[33m-- could not be determined --\033[m"
+   fi
+   echo ""
+   if [[ -n "$HTTP_USER" ]] ; then
+      echo -e "\033[4GApache2 User.....................: $HTTP_USER"
+   else
+      echo -e "\033[4GApache2 User.....................: \033[33m-- could not be determined --\033[m"
+   fi
+   if [[ -n "$HTTP_GROUP" ]] ; then
+      echo -e "\033[4GApache2 Group....................: $HTTP_GROUP"
+   else
+      echo -e "\033[4GApache2 Group....................: \033[33m-- could not be determined --\033[m"
+   fi
+   echo ""
+   if [[ ${#internal_ns_server_arr[@]} -gt 0 ]] ; then
+      _first=true
+      for _ns_server in ${internal_ns_server_arr[@]} ; do
+         if $_first  ; then
+            echo -e "\033[4GList of nameservers..............: $_ns_server"
+            _first=false
+         else
+            echo -e "\033[39G$_ns_server"
+         fi
+      done
+   else
+      echo -e "\033[4GList of nameservers..............: \033[33m-- Not given --\033[m"
+   fi
+
+else
+
+   echo ""
+   echo "    Apache2 Info:"
+   echo "    ============="
+   echo ""
+
+
+   if [[ -n $APACHE_VERSION ]]; then
+      echo "    Apache2 version..................: $APACHE_VERSION"
+   else
+      echo "    Apache2 version..................: -- could not be determined --"
+   fi
+   echo ""
+   if [[ -n "$APACHE_SERVER_ROOT" ]] ; then
+      echo "    Apache2 Root Directory...........: $APACHE_SERVER_ROOT"
+   else
+      echo "    Server Root Directory............: -- could not be determined --"
+   fi
+   echo ""
+   if [[ -x "$HTTPD_COMMAND"  ]] ; then
+      echo "    Apache2 daemon ..................: $HTTPD_COMMAND"
+   else
+      echo "    Apache2 daemon ..................: -- could not be determined --"
+   fi
+   echo ""
+   if [[ -n "${APACHE_VHOST_DIR}" ]] ; then
+      echo "    Apache2 VHost directory..........: $APACHE_VHOST_DIR"
+   else
+      echo "    Apache2 VHost directory..........: -- could not be determined --"
+   fi
+   echo ""
+   if [[ -n "$HTTP_USER" ]] ; then
+      echo "    Apache2 User.....................: $HTTP_USER"
+   else
+      echo "    Apache2 User.....................: -- could not be determined --"
+   fi
+   if [[ -n "$HTTP_GROUP" ]] ; then
+      echo "    Apache2 Group....................: $HTTP_GROUP"
+   else
+      echo "    Apache2 Group....................: -- could not be determined --"
+   fi
+   echo ""
+   if [[ ${#internal_ns_server_arr[@]} -gt 0 ]] ; then
+      _first=true
+      for _ns_server in ${internal_ns_server_arr[@]} ; do
+         if $_first  ; then
+            echo "    List of nameservers..............: $_ns_server"
+            _first=false
+         else
+            echo "                                       $_ns_server"
+         fi
+      done
+   else
+      echo "    List of nameservers..............: -- Not given --"
+   fi
+
+
+fi
+
+if [[ -z "${APACHE_VHOST_DIR}" ]] ; then
+   echo ""
+   error "Apache2 VHost directory not known.
+
+           Cannot determin sites with external authoritativ nameservers
+   
+           Exiting script now."
+   clean_up 1
+fi
+
+if [[ ${#internal_ns_server_arr[@]} -lt 1 ]] ; then
+   echo ""
+   error "List of internal nameservers not given.
+
+           Cannot determin sites with external authoritativ nameservers
+   
+           Exiting script now."
+   clean_up 1
+fi
+
+
+# Get list of vhost configurations
+#
+declare -a vhost_config_files_arr=()
+for _file in $(ls "${APACHE_VHOST_DIR}/"*.conf) ; do
+   vhost_config_files_arr+=("$(realpath $_file)")
+done
+
+
+sites_external_ns_servers=()
+if [[ ${#vhost_config_files_arr[@]} -gt 0 ]]; then
+
+   for _config_file in "${vhost_config_files_arr[@]}" ; do
+
+      [[ "$(basename "$_config_file")" =~ ^00 ]] && continue
+
+      _server_name=""
+      _server_aliases=""
+
+      site_names_arr=()
+
+      while read line ; do
+
+         # Get ServerName
+         #
+         if echo $line | grep  -e "^\s*ServerName" > /dev/null ; then
+
+            _server_name="$(echo $line | awk '{print$2}')"
+            if [[ ${#site_names_arr[@]} -eq 0 ]]; then
+               site_names_arr+=("${_server_name}")
+            elif [[ "${site_names_arr[0]}" != "$_server_name" ]]; then
+               error "$_config_file: Misconfigured ServerName"
+            fi
+            continue
+               
+         fi
+
+         # Get ServerAlias
+         #
+         if echo $line | grep  -e "^\s*ServerAlias" > /dev/null ; then
+
+            _server_aliases="$(echo $line | sed -e "s/ServerAlias//" | sed "s/^\s*//" | sed "s/\s*$//")"
+
+            for _alias in $_server_aliases ; do
+               if ! containsElement "$_alias"  "${site_names_arr[@]}" ; then
+                  site_names_arr+=("${_alias}")
+               else
+                  continue
+               fi
+            done
+            continue
+
+         fi
+
+      done < "$_config_file"
+
+
+      # Check if all site_names are hosted on O.OPEN Namesevers
+      #
+      for _site_name in "${site_names_arr[@]}" ; do
+
+         [[ "$_site_name" =~ \.\* ]] && continue
+
+         _name="$_site_name"
+
+
+         [[ $(dig +short $_name CNAME) ]] && continue
+
+         authorited_ns_servers="$(dig +short $_name NS)"
+
+         while [[ -z "$authorited_ns_servers" ]] ; do
+            _name="${_name#*.}"
+            authorited_ns_servers="$(dig +short $_name NS)"
+         done
+
+         _found=false
+         for _ns_name in $authorited_ns_servers ; do
+            for _internal_ns_server in ${internal_ns_server_arr[@]} ; do
+               if [[ "$_ns_name" =~ $_internal_ns_server ]] ; then
+                  _found=true
+                  break
+               fi
+            done
+            if $_found ; then
+               break;
+            fi
+         done
+
+         if ! $_found ; then
+            
+            _first=true
+            for _ns_name in $authorited_ns_servers ; do
+               _ns_name="${_ns_name%.}"
+               if $_first ; then
+                  ns_servers="${_ns_name}"
+                  _first=false
+               else
+                  ns_servers="${ns_servers},$_ns_name"
+               fi
+            done
+               
+            sites_external_ns_servers+=("${_config_file}:${_site_name}:${ns_servers}")
+         fi
+
+      done
+
+   done
+
+else
+   warn "No VHost configuration found on this apache2 installation"
+fi
+
+if [[ ${#sites_external_ns_servers[@]} -gt 0 ]] ; then
+
+   if $terminal ; then
+      echo ""
+      echo ""
+      echo -e "\033[4G\033[1m----------\033[m"
+      echo -e "\033[4GSites with external authoritative nameservers"
+      echo -e "\033[4G\033[1m----------\033[m"
+   else
+      echo ""
+      echo ""
+      echo "    ----------"
+      echo "    Sites with external authoritative nameservers"
+      echo "    ----------"
+   fi
+
+
+   for _val in "${sites_external_ns_servers[@]}" ; do
+      IFS=':' read -a _val_arr <<< "${_val}"
+      config_file="${_val_arr[0]}"
+      site_name="${_val_arr[1]}"
+      names_server="${_val_arr[2]}"
+      if [[ "${config_file}" != "${last_config_file}" ]] ; then
+         echo ""
+         if $terminal ; then
+            echo -e "\033[4G\033[33m$(basename "${config_file}")\033[m"
+         else
+            echo "    $(basename "${config_file}")"
+         fi
+         last_config_file="${config_file}"
+      fi
+      if $terminal ; then
+         echo -e "\033[7G${site_name}:\033[45G${names_server}"
+      else
+         echo -e "       ${site_name}: ${names_server}"
+      fi
+   done
+
+fi
+
+
+clean_up 0