diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 792dce0..792cd37 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,11 +11,13 @@ jobs:
         runs-on: ubuntu-22.04
         steps:
             - uses: actions/checkout@v7
+              with:
+                  submodules: 'true'
             - name: build toolchain container
               run: docker build . -t builder
             - uses: ammaraskar/gcc-problem-matcher@master
             - name: build Inkay
-              run: docker run --rm -v ${PWD}:/app -w /app builder
+              run: docker run --rm -v ${PWD}:${PWD} -w ${PWD} builder
             - uses: actions/upload-artifact@v7
               with:
                   name: inkay
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..c40d066
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "src/ext/libplum"]
+	path = src/ext/libplum
+	url = https://github.com/PretendoNetwork/libplum
diff --git a/Makefile b/Makefile
index fa5360d..55b7692 100644
--- a/Makefile
+++ b/Makefile
@@ -21,9 +21,9 @@ WUT_ROOT := $(DEVKITPRO)/wut
 #-------------------------------------------------------------------------------
 TARGET		:=	Inkay-pretendo
 BUILD		:=	build
-SOURCES		:=	src src/patches src/utils src/ext/inih common
+SOURCES		:=	src src/patches src/utils src/ext/inih src/ext/libplum/src common
 DATA		:=	data
-INCLUDES	:=	src src/ext/inih src/lang common
+INCLUDES	:=	src src/ext/inih src/ext/libplum/include/plum src/lang common
 
 #-------------------------------------------------------------------------------
 # options for code generation
diff --git a/common/wut_ac_missing.h b/common/wut_ac_missing.h
new file mode 100644
index 0000000..43f6e82
--- /dev/null
+++ b/common/wut_ac_missing.h
@@ -0,0 +1,8 @@
+#pragma once
+
+#include <nn/ac/ac_c.h>
+
+NNResult ACGetAssignedAlternativeDns(uint32_t *ip);
+NNResult ACGetAssignedGateway(uint32_t *ip);
+NNResult ACGetAssignedPreferedDns(uint32_t *ip); // sic
+NNResult ACGetAssignedSubnet(uint32_t *ip);
diff --git a/src/ext/libplum b/src/ext/libplum
new file mode 160000
index 0000000..79e85e6
--- /dev/null
+++ b/src/ext/libplum
@@ -0,0 +1 @@
+Subproject commit 79e85e61e638e04c10f74f65e1e06957d7658ac7
diff --git a/src/main.cpp b/src/main.cpp
index df482b3..1139f0d 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -23,6 +23,7 @@
 #include "patches/olv_urls.h"
 #include "patches/game_matchmaking.h"
 
+#include <plum.h>
 #include <wums.h>
 
 #include <coreinit/dynload.h>
@@ -189,6 +190,12 @@ WUMS_INITIALIZE() {
     if (NotificationModule_InitLibrary() != NOTIFICATION_MODULE_RESULT_SUCCESS) {
         DEBUG_FUNCTION_LINE("NotificationModule_InitLibrary failed");
     }
+
+    const plum_config_t plum_config = {
+        .log_level = PLUM_LOG_LEVEL_VERBOSE,
+        .log_callback = [](const plum_log_level_t level, const char *message) { DEBUG_FUNCTION_LINE("[PLUM-%d] %s", level, message) },
+    };
+    plum_init(&plum_config);
 }
 
 WUMS_DEINITIALIZE() {
@@ -202,6 +209,8 @@ WUMS_DEINITIALIZE() {
     NotificationModule_DeInitLibrary();
     FunctionPatcher_DeInitLibrary();
 
+    plum_cleanup();
+
     WHBLogCafeDeinit();
     WHBLogUdpDeinit();
 }
@@ -237,6 +246,7 @@ WUMS_ALL_APPLICATION_STARTS_DONE() {
 }
 
 WUMS_APPLICATION_ENDS() {
+    peertopeer_notify_titleswitch();
 }
 
 WUMS_EXPORT_FUNCTION(Inkay_Initialize);
diff --git a/src/patches/dns_hooks.cpp b/src/patches/dns_hooks.cpp
index a4f0840..2fa2bf3 100644
--- a/src/patches/dns_hooks.cpp
+++ b/src/patches/dns_hooks.cpp
@@ -34,6 +34,7 @@ constexpr std::pair<const char *, const char *> dns_replacements[] = {
 
 static const char * replace_dns_name(const char *dns_name) {
     if (!Config::connect_to_network) return dns_name;
+    if (!dns_name) return dns_name;
 
     for (auto [original, replacement] : dns_replacements) {
         if (strcmp(original, dns_name) == 0)
diff --git a/src/patches/game_peertopeer.cpp b/src/patches/game_peertopeer.cpp
index d986f36..3a54018 100644
--- a/src/patches/game_peertopeer.cpp
+++ b/src/patches/game_peertopeer.cpp
@@ -13,6 +13,7 @@
 
 #include <coreinit/title.h>
 #include <coreinit/dynload.h>
+#include <plum.h>
 #include "game_peertopeer.h"
 
 #include "config.h"
@@ -26,6 +27,31 @@
 #include <string_view>
 using namespace std::string_view_literals;
 
+static std::optional<int> upnp_id;
+
+static void upnp_cb(int id, plum_state_t state, const plum_mapping_t *mapping) {
+    DEBUG_FUNCTION_LINE("Plum result %d, %s:%hu", state, mapping->external_host, mapping->external_port);
+}
+
+static void upnp_go() {
+    const plum_mapping_t mapping = {
+        .protocol = PLUM_IP_PROTOCOL_UDP,
+        .internal_port = get_console_peertopeer_port(),
+        .user_ptr = nullptr,
+    };
+    int id = plum_create_mapping(&mapping, upnp_cb);
+    if (id < 0) return;
+
+    upnp_id = id;
+}
+
+static void upnp_stop() {
+    if (!upnp_id) return;
+
+    plum_destroy_mapping(*upnp_id);
+    upnp_id = std::nullopt;
+}
+
 static struct {
     std::array<uint64_t, 3> tid;
     uint16_t version;
@@ -51,24 +77,25 @@ static struct {
     },
 };
 
-static void generic_peertopeer_patch() {
+static bool generic_peertopeer_patch() {
     uint64_t tid = OSGetTitleID();
     uint16_t title_version = 0;
     if (const auto version_opt = get_current_title_version(); !version_opt) {
         DEBUG_FUNCTION_LINE("Failed to detect current title version");
-        return;
+        return false;
     } else {
         title_version = *version_opt;
         DEBUG_FUNCTION_LINE("Title version detected: %d", title_version);
     }
 
+    bool result = false;
     for (const auto &patch: generic_patch_games) {
         if (std::ranges::find(patch.tid, tid) == patch.tid.end()) continue;
 
         std::optional<OSDynLoad_NotifyData> game = search_for_rpl(patch.rpx);
         if (!game) {
             DEBUG_FUNCTION_LINE("Couldn't find game rpx! (%s)", patch.rpx.data());
-            return;
+            return false;
         }
 
         if (title_version != patch.version) {
@@ -85,19 +112,23 @@ static void generic_peertopeer_patch() {
 
         target = (uint16_t *)rpl_addr(*game, patch.max_port_addr);
         replace_unsigned<uint16_t>(target, 0xffff, port);
+
+        result = true;
         break;
     }
+
+    return result;
 }
 
-static void minecraft_peertopeer_patch() {
+static bool minecraft_peertopeer_patch() {
     std::optional<OSDynLoad_NotifyData> minecraft = search_for_rpl("Minecraft.Client.rpx"sv);
     if (!minecraft) {
         DEBUG_FUNCTION_LINE("Couldn't find minecraft rpx!");
-        return;
+        return false;
     }
     if (const auto version_opt = get_current_title_version(); !version_opt || *version_opt != 688) {
         DEBUG_FUNCTION_LINE("Wrong mincecraft version detected");
-        return;
+        return false;
     }
 
     auto port = get_console_peertopeer_port();
@@ -112,6 +143,8 @@ static void minecraft_peertopeer_patch() {
     replace_instruction(&target_func[0], 0x3c600001, 0x3c600000);        // li r3, 0
     replace_instruction(&target_func[1], 0x3863ffff, 0x60630000 | port); // ori r3, r3, port
     // blr
+
+    return true;
 }
 
 void peertopeer_patch() {
@@ -119,13 +152,21 @@ void peertopeer_patch() {
         return;
     }
 
-    uint64_t tid = OSGetTitleID();
+    bool patched;
+    const uint64_t tid = OSGetTitleID();
     if (tid == 0x00050000'101D7500 || // EUR
         tid == 0x00050000'101D9D00 || // USA
         tid == 0x00050000'101DBE00) { // JPN
 
-        minecraft_peertopeer_patch();
+        patched = minecraft_peertopeer_patch();
     } else {
-        generic_peertopeer_patch();
+        patched = generic_peertopeer_patch();
     }
+
+    if (patched)
+        upnp_go();
+}
+
+void peertopeer_notify_titleswitch() {
+    upnp_stop();
 }
diff --git a/src/patches/game_peertopeer.h b/src/patches/game_peertopeer.h
index 8211c00..d8dc714 100644
--- a/src/patches/game_peertopeer.h
+++ b/src/patches/game_peertopeer.h
@@ -14,3 +14,4 @@
 #pragma once
 
 void peertopeer_patch();
+void peertopeer_notify_titleswitch();