DNS diagnostic tool

dns/scripts/test_dns_service.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+echo '--- Ping the DNS container...'
+ping -c 4 wireguard-webadmin-dns
+echo ''
+echo ''
+echo '--- Checking firewall rules...'
+iptables -t nat -L WGWADM_PREROUTING -nv |grep -e pkts -e dpt:53
+
+output=$(iptables -t nat -L WGWADM_PREROUTING -nv | grep -e dpt:53)
+if [[ -z "$output" ]]; then
+  echo ''
+  echo '=== ERROR: No firewall rules redirecting the DNS service were found.'
+else
+  if [[ "$output" == *"127.0.0.250"* ]]; then
+    echo ''
+    echo '=== ERROR: The firewall script failed to resolve the DNS service name.'
+    echo '=== The IP 127.0.0.250 is a fallback address.'
+  fi
+fi
+echo ''
+echo ''
+echo '--- Testing the DNS resolution...'
+echo 'Resolving google.com...'
+dig @wireguard-webadmin-dns google.com +short
+echo ''
+echo ''
+echo '--- Testing getent hosts...'
+getent hosts wireguard-webadmin-dns
+DNS_IP=$(getent hosts wireguard-webadmin-dns | awk '{ print $1 }')
+if [ -z "$DNS_IP" ]; then
+    DNS_IP="127.0.0.250"
+fi
+echo "DNS IP: $DNS_IP"

dns/views.py

@@ -8,14 +8,19 @@ from .functions import generate_dnsmasq_config
 from django.conf import settings
 
 
-@login_required
-def view_apply_dns_config(request):
+def export_dns_configuration():
     dns_settings, _ = DNSSettings.objects.get_or_create(name='dns_settings')
     dns_settings.pending_changes = False
     dns_settings.save()
     dnsmasq_config = generate_dnsmasq_config()
     with open(settings.DNS_CONFIG_FILE, 'w') as f:
         f.write(dnsmasq_config)
+    return
+
+
+@login_required
+def view_apply_dns_config(request):
+    export_dns_configuration()
     messages.success(request, 'DNS settings applied successfully')
     return redirect('/dns/')