diff --git a/core/controllers/ConfigurationController.py b/core/controllers/ConfigurationController.py
index 2488396..78499d7 100644
--- a/core/controllers/ConfigurationController.py
+++ b/core/controllers/ConfigurationController.py
@@ -103,4 +103,3 @@ class ConfigurationController:
         configuration = ConfigurationController.get_or_new()
         configuration.dns = new_value
         configuration.save()
-
diff --git a/core/services/networking/systemwide/systemwide_wireguard.py b/core/services/networking/systemwide/systemwide_wireguard.py
index e909673..1f902ee 100644
--- a/core/services/networking/systemwide/systemwide_wireguard.py
+++ b/core/services/networking/systemwide/systemwide_wireguard.py
@@ -6,6 +6,7 @@ from core.services.networking.general_connection_tools.config_tools import extra
 from core.services.networking.systemwide import killswitch, dns
 from core.services.networking.systemwide.dns_tools.process_dns_result import orchestrate_dns_check
 from core.services.networking.systemwide.dns_tools.SearchResult import SearchResult, SearchError
+from core.services.networking.systemwide.wireguard.nmcli_tools import setup_nmcli_connection, setup_ipv6_sinkhole
 from core.errors.logger import logger
 
 from core.Constants import Constants
@@ -161,40 +162,6 @@ def terminate_system_connection(
             raise ConnectionTerminationError('The connection could not be terminated.')
 
 
-def setup_nmcli_connection(wg_config_path: str) -> Result:
-    try:
-        process_output = subprocess.check_output(('nmcli', 'connection', 'import', '--temporary', 'type', 'wireguard', 'file', wg_config_path), text=True)
-        return Result(valid=True, data=process_output)
-
-    except CalledProcessError as e:
-        return Result(valid=False, error_type=ResultError.NMCLI, message=f"Called Process error with nmcli: {e}")
-        # raise ConnectionError('The connection could not be established.')
-
-
-def setup_ipv6_sinkhole(process_output: str) -> Result:
-    error_info = "with nmcli setting up the IPv6 sinkhole, error is "
-    try:
-        connection_id = (m := re.search(r'(?<=\()([a-f0-9-]+?)(?=\))', process_output)) and m.group(1)
-        ipv6_method = subprocess.check_output(('nmcli', '-g', 'ipv6.method', 'connection', 'show', connection_id), text=True).strip()
-    except CalledProcessError as e:
-        return Result(valid=False, error_type=ResultError.NMCLI, message=f"Called Process error {error_info}: {e}")
-        # raise ConnectionError('The connection could not be established.')
-
-    if ipv6_method in ('disabled', 'ignore'):
-        try:
-            subprocess.run(('dbus-send', '--system', '--print-reply', '--dest=org.freedesktop.NetworkManager', '/org/freedesktop/NetworkManager', 'org.freedesktop.DBus.Properties.Set', 'string:org.freedesktop.NetworkManager', 'string:ConnectivityCheckEnabled', 'variant:boolean:false'), stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, check=True)
-        except CalledProcessError as e:
-            return Result(valid=False, error_type=ResultError.NMCLI, message=f"Called Process error {error_info}: {e}")
-            # raise ConnectionError('The connection could not be established.')
-
-        try:
-            subprocess.run(('nmcli', 'connection', 'add', 'type', 'dummy', 'save', 'no', 'con-name', 'hv-ipv6-sink', 'ifname', 'hvipv6sink0', 'ipv6.method', 'manual', 'ipv6.addresses', 'fd7a:fd4b:54e3:077c::/64', 'ipv6.gateway', 'fd7a:fd4b:54e3:077c::1', 'ipv6.dns', '::1', 'ipv6.route-metric', '72'), stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, check=True)
-            return Result(valid=True)
-
-        except CalledProcessError:
-            return Result(valid=False, error_type=ResultError.NMCLI, message=f"Called Process error {error_info}")
-            # raise ConnectionError('The connection could not be established.')
-
 
 def __establish_system_connection(
     profile: SystemProfile,
@@ -347,8 +314,8 @@ def establish_system_connection(
 
     # ================= SETTINGS =================
     firewall_setting = get_firewall_setting()
-    dns_setting = True # for testing
-    # dns_setting = get_dns_setting()
+    # dns_setting = True # for testing
+    dns_setting = get_dns_setting()
 
     # ================= CONNECT WG ================
     try:
diff --git a/core/services/networking/systemwide/wireguard/nmcli_tools.py b/core/services/networking/systemwide/wireguard/nmcli_tools.py
new file mode 100644
index 0000000..9e3f263
--- /dev/null
+++ b/core/services/networking/systemwide/wireguard/nmcli_tools.py
@@ -0,0 +1,42 @@
+from core.models.Result import Result, ResultError
+from subprocess import CalledProcessError
+import os
+import re
+import shutil
+import subprocess
+
+
+def setup_nmcli_connection(wg_config_path: str) -> Result:
+    try:
+        process_output = subprocess.check_output(('nmcli', 'connection', 'import', '--temporary', 'type', 'wireguard', 'file', wg_config_path), text=True)
+        return Result(valid=True, data=process_output)
+
+    except CalledProcessError as e:
+        return Result(valid=False, error_type=ResultError.NMCLI, message=f"Called Process error with nmcli: {e}")
+        # raise ConnectionError('The connection could not be established.')
+
+
+def setup_ipv6_sinkhole(process_output: str) -> Result:
+    error_info = "with nmcli setting up the IPv6 sinkhole, error is "
+    try:
+        connection_id = (m := re.search(r'(?<=\()([a-f0-9-]+?)(?=\))', process_output)) and m.group(1)
+        ipv6_method = subprocess.check_output(('nmcli', '-g', 'ipv6.method', 'connection', 'show', connection_id), text=True).strip()
+    except CalledProcessError as e:
+        return Result(valid=False, error_type=ResultError.NMCLI, message=f"Called Process error {error_info}: {e}")
+        # raise ConnectionError('The connection could not be established.')
+
+    if ipv6_method in ('disabled', 'ignore'):
+        try:
+            subprocess.run(('dbus-send', '--system', '--print-reply', '--dest=org.freedesktop.NetworkManager', '/org/freedesktop/NetworkManager', 'org.freedesktop.DBus.Properties.Set', 'string:org.freedesktop.NetworkManager', 'string:ConnectivityCheckEnabled', 'variant:boolean:false'), stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, check=True)
+        except CalledProcessError as e:
+            return Result(valid=False, error_type=ResultError.NMCLI, message=f"Called Process error {error_info}: {e}")
+            # raise ConnectionError('The connection could not be established.')
+
+        try:
+            subprocess.run(('nmcli', 'connection', 'add', 'type', 'dummy', 'save', 'no', 'con-name', 'hv-ipv6-sink', 'ifname', 'hvipv6sink0', 'ipv6.method', 'manual', 'ipv6.addresses', 'fd7a:fd4b:54e3:077c::/64', 'ipv6.gateway', 'fd7a:fd4b:54e3:077c::1', 'ipv6.dns', '::1', 'ipv6.route-metric', '72'), stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL, check=True)
+            return Result(valid=True)
+
+        except CalledProcessError:
+            return Result(valid=False, error_type=ResultError.NMCLI, message=f"Called Process error {error_info}")
+            # raise ConnectionError('The connection could not be established.')
+