diff --git a/ReleaseNotes.txt b/ReleaseNotes.txt
index 6fb70d7..df4fb90 100644
--- a/ReleaseNotes.txt
+++ b/ReleaseNotes.txt
@@ -1,10 +1,11 @@
 ------------------------------------------------------------------------------------------------------------------------------------
-Network Tools V 1.2.0 - A. GIBERT - 2026/04/20
+Network Tools V 1.2.0 - A. GIBERT - 2026/04/23
 ------------------------------------------------------------------------------------------------------------------------------------
 
 - Split repository to remove the Rx3 configuration part and push it to rx3-config repo,
 - Switch this repository to public,
 - Migrate Network Tools to the new Rx3 Base Bash library,
+- Add ip library,
 - Move usr/lib, usr/sbin & var/www to lib, sbin & www,
 - Add dns_host_update() to dns library,
 - Add RPM Spec & bash completion files,
diff --git a/SPECS/network_tools.spec b/SPECS/network_tools.spec
index 7175e09..7564e4e 100644
--- a/SPECS/network_tools.spec
+++ b/SPECS/network_tools.spec
@@ -50,7 +50,8 @@ Packager:                               Arnaud G. GIBERT <arnaud@rx3.net>
 
 BuildArch:                              noarch
 
-Requires:                               rx3-base
+Requires:                               %{name}-libs
+
 
 %description
 These tools aims to manage network operation on Rx3 systems. This include:
@@ -69,6 +70,17 @@ This release support IPTables and OpenVPN.
 
 
 
+%package                                libs
+Summary:                                Rx3 Network Tools Libraries
+Requires:                               rx3-base
+Requires:                               bind-utils
+
+
+%description                            libs
+These tools aims to manage network operation on Rx3 systems.
+This is the bash libraires.
+
+
 
 
 #-----------------------------------------------------------------------------------------------------------------------------------
@@ -106,7 +118,6 @@ cp etc/sysconfig/*                      %{buildroot}%{_sysconfdir}/sysconfig
 %{__mkdir_p}                            %{buildroot}%{_unitdir}
 cp etc/systemd/system/*                 %{buildroot}%{_unitdir}
 
-
 # Bash completion
 %{__mkdir_p}                            %{buildroot}%{_sysconfdir}/bash_completion.d
 cp etc/bash_completion.d/*              %{buildroot}%{_sysconfdir}/bash_completion.d
@@ -142,7 +153,8 @@ cp www/cgi-bin/*.cgi                    %{buildroot}%{_webcgi}
 #-----------------------------------------------------------------------------------------------------------------------------------
 
 %post
-%_post_service %{name}
+%_post_service rx3-network
+%_post_service rx3-vpn
 
 
 
@@ -153,7 +165,8 @@ cp www/cgi-bin/*.cgi                    %{buildroot}%{_webcgi}
 #-----------------------------------------------------------------------------------------------------------------------------------
 
 %preun
-%_preun_service %{name}
+%_preun_service rx3-vpn
+%_preun_service rx3-network
 
 
 
@@ -170,11 +183,16 @@ cp www/cgi-bin/*.cgi                    %{buildroot}%{_webcgi}
 %defattr(644,root,root)
                                         %{_sysconfdir}/bash_completion.d/*
                                         %{_unitdir}/*.service
-                                        %{_prefix}/lib/rx3/*
 %defattr(0755,root,root)
                                         %{_sbindir}/*
                                         %{_webcgi}/*.cgi
 
+%files libs
+%doc                                    ReadMe.txt ReleaseNotes.txt ToDo.txt
+%license                                COPYING COPYING.LESSER GNU_GPL-3.0.txt GNU_LGPL-3.0.txt GNU_FDL-1.3.txt
+%defattr(644,root,root)
+                                        %{_prefix}/lib/rx3/*
+
 
 
 
@@ -184,5 +202,5 @@ cp www/cgi-bin/*.cgi                    %{buildroot}%{_webcgi}
 #-----------------------------------------------------------------------------------------------------------------------------------
 
 %changelog
-* Mon Apr 20 2026 Arnaud G. GIBERT <arnaud@rx3.net> - 1.2.0-1rx3.mga9
+* Tue Apr 21 2026 Arnaud G. GIBERT <arnaud@rx3.net> - 1.2.0-1rx3.mga9
 - Create initial SPEC file for 1.2.0 on Mageia 9
diff --git a/lib/rx3/dns.bash b/lib/rx3/dns.bash
index 68602c5..71f86f8 100644
--- a/lib/rx3/dns.bash
+++ b/lib/rx3/dns.bash
@@ -36,7 +36,7 @@ fi
 #-----------------------------------------------------------------------------------------------------------------------------------
 
 : "${RX3_LIB_DIR:=/usr/lib/rx3}"
-. "${RX3_LIB_DIR}/base.bash"
+. "${RX3_LIB_DIR}/ip.bash"
 
 
 
@@ -47,13 +47,13 @@ fi
 #-----------------------------------------------------------------------------------------------------------------------------------
 
 declare -Ag DNS_A_TAB
-declare -g  DNS_A_ID_LIST
+declare -g  DNS_A_ID_LIST=""
 
 declare -Ag DNS_PTR_TAB
-declare -g  DNS_PTR_ID_LIST
+declare -g  DNS_PTR_ID_LIST=""
 
-declare -g  DNS_CACHE_FILE
-declare -g  DNS_CACHE_LOCK
+declare -g  DNS_CACHE_FILE=""
+declare -g  DNS_CACHE_LOCK=""
 #declare -g  DNS_CACHE_LOCK="${DNS_CACHE_FILE}"
 
 declare -g  DNS_CACHE_UPDATED=0
@@ -224,19 +224,19 @@ dns_lookup()
 
     if [[ "${dl_flag}" != "NOCACHE" ]]
     then
-	dns_tab_get ${dl_type} ${dl_key}
+        { dns_tab_get ${dl_type} ${dl_key}; rc=$?; } || true
     else
-	false
+        rc=1
     fi
 
-    if [[ "$?" != "0" ]]
+    if [[ "${rc}" != "0" ]]
     then
-	log_trace "DNS" "Out of Cache: Type: [${dl_type}]   Key: [${dl_key}]   Flag: [${dl_flag}]"
+	#log_trace "DNS" "Out of Cache: Type: [${dl_type}]   Key: [${dl_key}]   Flag: [${dl_flag}]"
 	
 	case ${dl_type}
 	in
 	    "A")
-		dns_value="$( dig +short    ${dl_key} 2>/dev/null)"   
+		dns_value="$( dig +short    ${dl_key} 2>/dev/null | ip_ip_filter)"   
 		;;
 	    
 	    "PTR")
@@ -333,8 +333,8 @@ dns_host_update()
 
 dns_init()
 {
-    file_dir_init ${DNS_CACHE_FILE} root apache
-    file_dir_init ${DNS_CACHE_LOCK} root apache
+    file_dir_init "${DNS_CACHE_FILE}" root apache
+    file_dir_init "${DNS_CACHE_LOCK}" root apache
 }
 
 
diff --git a/lib/rx3/ip.bash b/lib/rx3/ip.bash
new file mode 100644
index 0000000..721f3ac
--- /dev/null
+++ b/lib/rx3/ip.bash
@@ -0,0 +1,145 @@
+#!/bin/bash
+#-----------------------------------------------------------------------------------------------------------------------------------
+# 
+# Rx3 IP Library
+# 
+# Copyright (C) 2025-2026 Arnaud G. GIBERT
+# mailto:arnaud@rx3.net
+# 
+# This is free software: you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as published
+# by the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+# 
+# You should have received a copy of the GNU Lesser General Public
+# License along with this program; If not, see
+# <https://www.gnu.org/licenses/>.
+# 
+#-----------------------------------------------------------------------------------------------------------------------------------
+
+if [[ "${RX3_IP_LIB}" != "" ]]
+then
+    return
+else
+    declare -g RX3_IP_LIB=1
+fi
+
+
+
+#-----------------------------------------------------------------------------------------------------------------------------------
+# Includes
+#-----------------------------------------------------------------------------------------------------------------------------------
+
+: "${RX3_LIB_DIR:=/usr/lib/rx3}"
+. "${RX3_LIB_DIR}/base.bash"
+
+
+
+
+
+#-----------------------------------------------------------------------------------------------------------------------------------
+# Global Variable
+#-----------------------------------------------------------------------------------------------------------------------------------
+
+
+
+
+
+#--------------------------------------------------------------------------------------------------------------------------
+# Is Valid Ip
+#--------------------------------------------------------------------------------------------------------------------------
+
+ip_is_valid_ip()
+{
+    local ip=$1
+    local regex='^([0-9]{1,3}\.){3}[0-9]{1,3}$'
+    
+
+    if [[ $ip =~ $regex ]]
+    then
+        IFS='.' read -r o1 o2 o3 o4 <<< "$ip"
+	
+        for octet in $o1 $o2 $o3 $o4
+	do
+            if (( octet < 0 || octet > 255 ))
+	    then
+                return 1
+            fi
+        done
+	
+        return 0
+    else
+        return 1
+    fi
+}
+
+
+
+
+
+#--------------------------------------------------------------------------------------------------------------------------
+# Ip To Num
+#--------------------------------------------------------------------------------------------------------------------------
+
+ip_ip_to_num()
+{
+    local ip="$1"
+    local a
+    local b
+    local c
+    local d
+    
+    IFS=. read -r a b c d <<< "${ip}"
+    
+    echo $(( (a << 24) + (b << 16) + (c << 8) + d ))
+}
+
+
+
+
+
+#--------------------------------------------------------------------------------------------------------------------------
+# Num To Ip
+#--------------------------------------------------------------------------------------------------------------------------
+
+ip_num_to_ip()
+{
+    local num="$1"
+
+    
+    # Optional safety check
+    if (( num < 0 || num > 4294967295 ))
+    then
+        echo_error "num_to_ip: value out of range (0‑4294967295)"
+        return 1
+    fi
+
+    # Extract each byte by shifting and masking
+    local a=$(( (num >> 24) & 255 ))
+    local b=$(( (num >> 16) & 255 ))
+    local c=$(( (num >>  8) & 255 ))
+    local d=$((  num        & 255 ))
+
+    printf '%d.%d.%d.%d\n' "$a" "$b" "$c" "$d"
+}
+
+
+
+
+
+#-----------------------------------------------------------------------------------------------------------------------------------
+# IP Filter
+#-----------------------------------------------------------------------------------------------------------------------------------
+
+ip_ip_filter()
+{
+    grep -E '^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$'
+}
+
+
+
diff --git a/lib/rx3/network.bash b/lib/rx3/network.bash
index 17d9282..2f8c7e0 100644
--- a/lib/rx3/network.bash
+++ b/lib/rx3/network.bash
@@ -79,88 +79,6 @@ declare -g  NETWORK_NC_TIMEOUT
 
 
 
-#--------------------------------------------------------------------------------------------------------------------------
-# is_valid_ip
-#--------------------------------------------------------------------------------------------------------------------------
-
-is_valid_ip()
-{
-    local ip=$1
-    local regex='^([0-9]{1,3}\.){3}[0-9]{1,3}$'
-    
-
-    if [[ $ip =~ $regex ]]
-    then
-        IFS='.' read -r o1 o2 o3 o4 <<< "$ip"
-	
-        for octet in $o1 $o2 $o3 $o4
-	do
-            if (( octet < 0 || octet > 255 ))
-	    then
-                return 1
-            fi
-        done
-	
-        return 0
-    else
-        return 1
-    fi
-}
-
-
-
-
-
-#--------------------------------------------------------------------------------------------------------------------------
-# ip_to_num
-#--------------------------------------------------------------------------------------------------------------------------
-
-ip_to_num()
-{
-    local ip="$1"
-    local a
-    local b
-    local c
-    local d
-    
-    IFS=. read -r a b c d <<< "${ip}"
-    
-    echo $(( (a << 24) + (b << 16) + (c << 8) + d ))
-}
-
-
-
-
-
-#--------------------------------------------------------------------------------------------------------------------------
-# num_to_ip
-#--------------------------------------------------------------------------------------------------------------------------
-
-num_to_ip()
-{
-    local num="$1"
-
-    
-    # Optional safety check
-    if (( num < 0 || num > 4294967295 ))
-    then
-        echo_error "num_to_ip: value out of range (0‑4294967295)"
-        return 1
-    fi
-
-    # Extract each byte by shifting and masking
-    local a=$(( (num >> 24) & 255 ))
-    local b=$(( (num >> 16) & 255 ))
-    local c=$(( (num >>  8) & 255 ))
-    local d=$((  num        & 255 ))
-
-    printf '%d.%d.%d.%d\n' "$a" "$b" "$c" "$d"
-}
-
-
-
-
-
 #--------------------------------------------------------------------------------------------------------------------------
 # network_common_load
 #--------------------------------------------------------------------------------------------------------------------------
@@ -658,7 +576,7 @@ network_src_tab_load()
 
     log_trace "Network" "Loading Src tab..."
 
-    ip_base=$( ip_to_num ${NETWORK_SRC_LOCAL_ADDRESS})
+    ip_base=$( ip_ip_to_num ${NETWORK_SRC_LOCAL_ADDRESS})
     
     while IFS= read -r line
     do
@@ -691,7 +609,7 @@ network_src_tab_load()
 #		    [[ $nstl_host_name =~ ([0-9]+) ]]
 #		    nstl_device="${NETWORK_SRC_LOCAL_DEVICE}-${BASH_REMATCH[1]}"
 
-                          ip_num=$(ip_to_num ${nstl_ip})
+                          ip_num=$(ip_ip_to_num ${nstl_ip})
                       device_num="$(( ( ${ip_num} - ${ip_base}) / 4))"
                     
                     nstl_device="${NETWORK_SRC_LOCAL_DEVICE}-${device_num}"
@@ -1214,7 +1132,7 @@ network_dst_address_refresh()
                     dst_ip_new="$( nc -w "${NETWORK_NC_TIMEOUT}" "${proxy_host}" "${proxy_port}" 2>/dev/null)"
                  fi
 
-                if is_valid_ip "${dst_ip_new}"
+                if ip_is_valid_ip "${dst_ip_new}"
                 then
                     if [[ "${dst_ip}" != "${dst_ip_new}" ]]
                     then