From bb0099cb74d6cf9fa62fb178bc7d6c40cc7e3d90 Mon Sep 17 00:00:00 2001
From: Mykola Baibuz <mykola.baibuz@gmail.com>
Date: Sun, 18 May 2025 19:36:35 +0300
Subject: [PATCH] Don't setup secondary DNS for OpenVPN with AmneziaDNS

---
 client/configurators/openvpn_configurator.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/client/configurators/openvpn_configurator.cpp b/client/configurators/openvpn_configurator.cpp
index eca81afd..9dddef95 100644
--- a/client/configurators/openvpn_configurator.cpp
+++ b/client/configurators/openvpn_configurator.cpp
@@ -118,6 +118,12 @@ QString OpenVpnConfigurator::processConfigWithLocalSettings(const QPair<QString,
         QRegularExpression regex("redirect-gateway.*");
         config.replace(regex, "");
         
+        // We don't use secondary DNS if primary DNS is AmneziaDNS
+        if (dns.first.contains(protocols::dns::amneziaDnsIp)) {
+            QRegularExpression dnsRegex("dhcp-option DNS " + dns.second);
+            config.replace(dnsRegex, "");
+        }
+
         if (!m_settings->isSitesSplitTunnelingEnabled()) {
             config.append("\nredirect-gateway def1 ipv6 bypass-dhcp\n");
 
@@ -169,6 +175,12 @@ QString OpenVpnConfigurator::processConfigWithExportSettings(const QPair<QString
     QRegularExpression regex("redirect-gateway.*");
     config.replace(regex, "");
 
+    // We don't use secondary DNS if primary DNS is AmneziaDNS
+    if (dns.first.contains(protocols::dns::amneziaDnsIp)) {
+        QRegularExpression dnsRegex("dhcp-option DNS " + dns.second);
+        config.replace(dnsRegex, "");
+    }
+
     config.append("\nredirect-gateway def1 ipv6 bypass-dhcp\n");
 
     // Prevent ipv6 leak