diff --git a/build/fietsje/main.go b/build/fietsje/main.go
index 55fc238..f227d9b 100644
--- a/build/fietsje/main.go
+++ b/build/fietsje/main.go
@@ -102,7 +102,12 @@
 	// Used by //core/cmd/nanoswitch
 	p.collect("github.com/google/nftables", "7127d9d22474b437f0e8136ddb21855df29790bf").use(
 		"github.com/koneu/natend",
+	)
+
+	// used by //core//kubernetes/clusternet
+	p.collect("golang.zx2c4.com/wireguard/wgctrl", "ec7f26be9d9e47a32a2789f8c346031978485cbf").use(
 		"github.com/mdlayher/netlink",
+		"github.com/mdlayher/genetlink",
 	)
 
 	// First generate the repositories starlark rule into memory. This is because rendering will lock all unlocked
diff --git a/core/BUILD b/core/BUILD
index 23cb537..5328671 100644
--- a/core/BUILD
+++ b/core/BUILD
@@ -36,8 +36,7 @@
         # Containerd config files
         "//core/internal/containerd:runsc.toml": "/containerd/conf/runsc.toml",
         "//core/internal/containerd:config.toml": "/containerd/conf/config.toml",
-        "//core/internal/containerd:loopback.json": "/containerd/conf/cni/99-loopback.conf",
-        "//core/internal/containerd:ptp.json": "/containerd/conf/cni/10-ptp.conf",
+        "//core/internal/containerd:cnispec.gojson": "/containerd/conf/cnispec.gojson",
 
         # CNI Plugins
         "@com_github_containernetworking_plugins//plugins/main/loopback": "/containerd/bin/cni/loopback",
diff --git a/core/internal/common/setup.go b/core/internal/common/setup.go
index fa5cd59..6510774 100644
--- a/core/internal/common/setup.go
+++ b/core/internal/common/setup.go
@@ -34,6 +34,7 @@
 	MasterServicePort   = 7833
 	ExternalServicePort = 7836
 	DebugServicePort    = 7837
+	WireGuardPort       = 7838
 	KubernetesAPIPort   = 6443
 	DebuggerPort        = 2345
 )
diff --git a/core/internal/containerd/BUILD.bazel b/core/internal/containerd/BUILD.bazel
index 56c2822..a1deae0 100644
--- a/core/internal/containerd/BUILD.bazel
+++ b/core/internal/containerd/BUILD.bazel
@@ -15,6 +15,5 @@
 exports_files([
     "config.toml",
     "runsc.toml",
-    "loopback.json",
-    "ptp.json",
+    "cnispec.gojson",
 ])
diff --git a/core/internal/containerd/cnispec.gojson b/core/internal/containerd/cnispec.gojson
new file mode 100644
index 0000000..0057036
--- /dev/null
+++ b/core/internal/containerd/cnispec.gojson
@@ -0,0 +1,29 @@
+{{- /*gotype: github.com/containerd/cri/pkg/server.cniConfigTemplate*/ -}}
+{
+    "name": "k8s-pod-network",
+    "cniVersion": "0.3.1",
+    "plugins": [
+        {
+            "type": "ptp",
+            "mtu": 1420,
+            "ipam": {
+                "type": "host-local",
+                "dataDir": "/containerd/run/ipam",
+                "ranges": [
+                    {{range $i, $range := .PodCIDRRanges}}{{if $i}},
+            {{end}}[
+            {
+                "subnet": "{{$range}}"
+            }
+        ]
+        {{end}}
+    ],
+    "routes": [
+        {{range $i, $route := .Routes}}{{if $i}},
+    {{end}}{
+    "dst": "{{$route}}"
+}{{end}}]
+}
+}
+]
+}
\ No newline at end of file
diff --git a/core/internal/containerd/config.toml b/core/internal/containerd/config.toml
index 5a7e2f6..415391a 100644
--- a/core/internal/containerd/config.toml
+++ b/core/internal/containerd/config.toml
@@ -90,8 +90,8 @@
     [plugins."io.containerd.grpc.v1.cri".cni]
       bin_dir = "/containerd/bin/cni"
       conf_dir = "/containerd/conf/cni"
-      max_conf_num = 1
-      conf_template = ""
+      max_conf_num = 0
+      conf_template = "/containerd/conf/cnispec.gojson"
     [plugins."io.containerd.grpc.v1.cri".registry]
       [plugins."io.containerd.grpc.v1.cri".registry.mirrors]
         [plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]
diff --git a/core/internal/containerd/loopback.json b/core/internal/containerd/loopback.json
deleted file mode 100644
index f375c5d..0000000
--- a/core/internal/containerd/loopback.json
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-  "cniVersion": "0.3.0",
-  "type": "loopback"
-}
diff --git a/core/internal/containerd/ptp.json b/core/internal/containerd/ptp.json
deleted file mode 100644
index d95da5d..0000000
--- a/core/internal/containerd/ptp.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-  "name": "k8s-pod-network",
-  "cniVersion": "0.3.1",
-  "type": "ptp",
-  "mtu": 1420,
-  "ipam": {
-    "type": "host-local",
-    "subnet": "192.168.198.0/24",
-    "routes": [{ "dst": "0.0.0.0/0" }],
-    "dataDir": "/containerd/run/ipam"
-  }
-}
diff --git a/core/internal/kubernetes/BUILD.bazel b/core/internal/kubernetes/BUILD.bazel
index 97387df..0a7fa22 100644
--- a/core/internal/kubernetes/BUILD.bazel
+++ b/core/internal/kubernetes/BUILD.bazel
@@ -18,6 +18,7 @@
         "//core/internal/common:go_default_library",
         "//core/internal/common/supervisor:go_default_library",
         "//core/internal/consensus:go_default_library",
+        "//core/internal/kubernetes/clusternet:go_default_library",
         "//core/internal/kubernetes/pki:go_default_library",
         "//core/internal/kubernetes/reconciler:go_default_library",
         "//core/internal/storage:go_default_library",
diff --git a/core/internal/kubernetes/apiserver.go b/core/internal/kubernetes/apiserver.go
index 0a740dd..26c258a 100644
--- a/core/internal/kubernetes/apiserver.go
+++ b/core/internal/kubernetes/apiserver.go
@@ -103,7 +103,7 @@
 				pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: config.kubeletClientCert})),
 			args.FileOpt("--kubelet-client-key", "kubelet-client-key.pem",
 				pem.EncodeToMemory(&pem.Block{Type: "PRIVATE KEY", Bytes: config.kubeletClientKey})),
-			"--kubelet-preferred-address-types=Hostname",
+			"--kubelet-preferred-address-types=InternalIP",
 			args.FileOpt("--proxy-client-cert-file", "aggregation-client-cert.pem",
 				pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: config.aggregationClientCert})),
 			args.FileOpt("--proxy-client-key-file", "aggregation-client-key.pem",
diff --git a/core/internal/kubernetes/clusternet/BUILD.bazel b/core/internal/kubernetes/clusternet/BUILD.bazel
new file mode 100644
index 0000000..484439c
--- /dev/null
+++ b/core/internal/kubernetes/clusternet/BUILD.bazel
@@ -0,0 +1,27 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "clusternet.go",
+        "netlink_compat.go",
+    ],
+    importpath = "git.monogon.dev/source/nexantic.git/core/internal/kubernetes/clusternet",
+    visibility = ["//core:__subpackages__"],
+    deps = [
+        "//core/internal/common:go_default_library",
+        "//core/internal/common/supervisor:go_default_library",
+        "//core/pkg/jsonpatch:go_default_library",
+        "@com_github_vishvananda_netlink//:go_default_library",
+        "@com_zx2c4_golang_wireguard_wgctrl//:go_default_library",
+        "@com_zx2c4_golang_wireguard_wgctrl//wgtypes:go_default_library",
+        "@io_k8s_api//core/v1:go_default_library",
+        "@io_k8s_apimachinery//pkg/apis/meta/v1:go_default_library",
+        "@io_k8s_apimachinery//pkg/types:go_default_library",
+        "@io_k8s_client_go//informers:go_default_library",
+        "@io_k8s_client_go//informers/core/v1:go_default_library",
+        "@io_k8s_client_go//kubernetes:go_default_library",
+        "@io_k8s_client_go//tools/cache:go_default_library",
+        "@org_uber_go_zap//:go_default_library",
+    ],
+)
diff --git a/core/internal/kubernetes/clusternet/clusternet.go b/core/internal/kubernetes/clusternet/clusternet.go
new file mode 100644
index 0000000..aa3e7ce
--- /dev/null
+++ b/core/internal/kubernetes/clusternet/clusternet.go
@@ -0,0 +1,266 @@
+// Copyright 2020 The Monogon Project Authors.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package clusternet implements a WireGuard-based overlay network for Kubernetes. It relies on controller-manager's
+// IPAM to assign IP ranges to nodes and on Kubernetes' Node objects to distribute the Node IPs and public keys.
+//
+// It sets up a single WireGuard network interface and routes the entire ClusterCIDR into that network interface,
+// relying on WireGuard's AllowedIPs mechanism to look up the correct peer node to send the traffic to. This means
+// that the routing table doesn't change and doesn't have to be separately managed. When clusternet is started
+// it annotates its WireGuard public key onto its node object.
+// For each node object that's created or updated on the K8s apiserver it checks if a public key annotation is set and
+// if yes a peer with that public key, its InternalIP as endpoint and the CIDR for that node as AllowedIPs is created.
+package clusternet
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"net"
+	"os"
+
+	"github.com/vishvananda/netlink"
+	"go.uber.org/zap"
+	"golang.zx2c4.com/wireguard/wgctrl"
+	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/client-go/informers"
+	coreinformers "k8s.io/client-go/informers/core/v1"
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/tools/cache"
+
+	"git.monogon.dev/source/nexantic.git/core/internal/common"
+	"git.monogon.dev/source/nexantic.git/core/internal/common/supervisor"
+	"git.monogon.dev/source/nexantic.git/core/pkg/jsonpatch"
+)
+
+const (
+	clusterNetDeviceName = "clusternet"
+	publicKeyAnnotation  = "node.smalltown.nexantic.com/wg-pubkey"
+
+	privateKeyPath = "/data/kubernetes/clusternet.key"
+)
+
+type clusternet struct {
+	nodeName     string
+	wgClient     *wgctrl.Client
+	nodeInformer coreinformers.NodeInformer
+	logger       *zap.Logger
+}
+
+// ensureNode creates/updates the corresponding WireGuard peer entry for the given node objet
+func (c *clusternet) ensureNode(newNode *corev1.Node) error {
+	if newNode.Name == c.nodeName {
+		// Node doesn't need to connect to itself
+		return nil
+	}
+	pubKeyRaw := newNode.Annotations[publicKeyAnnotation]
+	if pubKeyRaw == "" {
+		return nil
+	}
+	pubKey, err := wgtypes.ParseKey(pubKeyRaw)
+	if err != nil {
+		return fmt.Errorf("failed to parse public-key annotation: %w", err)
+	}
+	var internalIP net.IP
+	for _, addr := range newNode.Status.Addresses {
+		if addr.Type == corev1.NodeInternalIP {
+			if internalIP != nil {
+				c.logger.Warn("More than one NodeInternalIP specified, using the first one")
+				break
+			}
+			internalIP = net.ParseIP(addr.Address)
+			if internalIP == nil {
+				c.logger.Warn("failed to parse Internal IP")
+			}
+		}
+	}
+	if internalIP == nil {
+		return errors.New("node has no Internal IP")
+	}
+	var allowedIPs []net.IPNet
+	for _, podNetStr := range newNode.Spec.PodCIDRs {
+		_, podNet, err := net.ParseCIDR(podNetStr)
+		if err != nil {
+			c.logger.Warn("Node PodCIDR failed to parse, ignored", zap.Error(err), zap.String("node", newNode.Name))
+			continue
+		}
+		allowedIPs = append(allowedIPs, *podNet)
+	}
+	c.logger.Debug("Adding/Updating WireGuard peer node", zap.String("node", newNode.Name),
+		zap.String("endpointIP", internalIP.String()), zap.Any("allowedIPs", allowedIPs))
+	// WireGuard's kernel side has create/update semantics on peers by default. So we can just add the peer multiple
+	// times to update it.
+	err = c.wgClient.ConfigureDevice(clusterNetDeviceName, wgtypes.Config{
+		Peers: []wgtypes.PeerConfig{{
+			PublicKey:         pubKey,
+			Endpoint:          &net.UDPAddr{Port: common.WireGuardPort, IP: internalIP},
+			ReplaceAllowedIPs: true,
+			AllowedIPs:        allowedIPs,
+		}},
+	})
+	if err != nil {
+		return fmt.Errorf("failed to add WireGuard peer node: %w", err)
+	}
+	return nil
+}
+
+// removeNode removes the corresponding WireGuard peer entry for the given node object
+func (c *clusternet) removeNode(oldNode *corev1.Node) error {
+	if oldNode.Name == c.nodeName {
+		// Node doesn't need to connect to itself
+		return nil
+	}
+	pubKeyRaw := oldNode.Annotations[publicKeyAnnotation]
+	if pubKeyRaw == "" {
+		return nil
+	}
+	pubKey, err := wgtypes.ParseKey(pubKeyRaw)
+	if err != nil {
+		return fmt.Errorf("node public-key annotation not decodable: %w", err)
+	}
+	err = c.wgClient.ConfigureDevice(clusterNetDeviceName, wgtypes.Config{
+		Peers: []wgtypes.PeerConfig{{
+			PublicKey: pubKey,
+			Remove:    true,
+		}},
+	})
+	if err != nil {
+		return fmt.Errorf("failed to remove WireGuard peer node: %w", err)
+	}
+	return nil
+}
+
+// EnsureOnDiskKey loads the private key from disk or (if none exists) generates one and persists it.
+func EnsureOnDiskKey() (*wgtypes.Key, error) {
+	privKeyRaw, err := ioutil.ReadFile(privateKeyPath)
+	if os.IsNotExist(err) {
+		privKey, err := wgtypes.GeneratePrivateKey()
+		if err != nil {
+			return nil, fmt.Errorf("failed to generate private key: %w", err)
+		}
+		if err := ioutil.WriteFile(privateKeyPath, []byte(privKey.String()), 0600); err != nil {
+			return nil, fmt.Errorf("failed to store newly generated key: %w", err)
+		}
+		return &privKey, nil
+	} else if err != nil {
+		return nil, fmt.Errorf("failed to load on-disk key: %w", err)
+	}
+	privKey, err := wgtypes.ParseKey(string(privKeyRaw))
+	if err != nil {
+		return nil, fmt.Errorf("invalid private key in file: %w", err)
+	}
+	return &privKey, nil
+}
+
+// Run runs the ClusterNet service. See package description for what it does.
+func Run(informerFactory informers.SharedInformerFactory, clusterNet net.IPNet, clientSet kubernetes.Interface, key *wgtypes.Key) supervisor.Runnable {
+	return func(ctx context.Context) error {
+		logger := supervisor.Logger(ctx)
+		nodeName, err := os.Hostname()
+		if err != nil {
+			return fmt.Errorf("failed to determine hostname: %w", err)
+		}
+		wgClient, err := wgctrl.New()
+		if err != nil {
+			return fmt.Errorf("failed to connect to netlink's WireGuard config endpoint: %w", err)
+		}
+
+		nodeAnnotationPatch := []jsonpatch.JsonPatchOp{{
+			Operation: "add",
+			Path:      "/metadata/annotations/" + jsonpatch.EncodeJSONRefToken(publicKeyAnnotation),
+			Value:     key.PublicKey().String(),
+		}}
+
+		nodeAnnotationPatchRaw, err := json.Marshal(nodeAnnotationPatch)
+		if err != nil {
+			return fmt.Errorf("failed to encode JSONPatch: %w", err)
+		}
+
+		if _, err := clientSet.CoreV1().Nodes().Patch(ctx, nodeName, types.JSONPatchType, nodeAnnotationPatchRaw, metav1.PatchOptions{}); err != nil {
+			return fmt.Errorf("failed to set ClusterNet public key for node: %w", err)
+		}
+
+		nodeInformer := informerFactory.Core().V1().Nodes()
+		wgInterface := &Wireguard{LinkAttrs: netlink.LinkAttrs{Name: clusterNetDeviceName, Flags: net.FlagUp}}
+		if err := netlink.LinkAdd(wgInterface); err != nil {
+			return fmt.Errorf("failed to add WireGuard network interfacee: %w", err)
+		}
+		defer netlink.LinkDel(wgInterface)
+
+		listenPort := common.WireGuardPort
+		if err := wgClient.ConfigureDevice(clusterNetDeviceName, wgtypes.Config{
+			PrivateKey: key,
+			ListenPort: &listenPort,
+		}); err != nil {
+			return fmt.Errorf("failed to set up WireGuard interface: %w", err)
+		}
+
+		if err := netlink.RouteAdd(&netlink.Route{
+			Dst:       &clusterNet,
+			LinkIndex: wgInterface.Index,
+		}); err != nil && !os.IsExist(err) {
+			return fmt.Errorf("failed to add cluster net route to Wireguard interface: %w", err)
+		}
+
+		cnet := clusternet{
+			wgClient:     wgClient,
+			nodeInformer: nodeInformer,
+			logger:       logger,
+			nodeName:     nodeName,
+		}
+
+		nodeInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
+			AddFunc: func(new interface{}) {
+				newNode, ok := new.(*corev1.Node)
+				if !ok {
+					logger.Error("Received non-node item in node event handler", zap.Reflect("item", new))
+					return
+				}
+				if err := cnet.ensureNode(newNode); err != nil {
+					logger.Warn("Failed to sync node", zap.Error(err))
+				}
+			},
+			UpdateFunc: func(old, new interface{}) {
+				newNode, ok := new.(*corev1.Node)
+				if !ok {
+					logger.Error("Received non-node item in node event handler", zap.Reflect("item", new))
+					return
+				}
+				if err := cnet.ensureNode(newNode); err != nil {
+					logger.Warn("Failed to sync node", zap.Error(err))
+				}
+			},
+			DeleteFunc: func(old interface{}) {
+				oldNode, ok := old.(*corev1.Node)
+				if !ok {
+					logger.Error("Received non-node item in node event handler", zap.Reflect("item", oldNode))
+					return
+				}
+				if err := cnet.removeNode(oldNode); err != nil {
+					logger.Warn("Failed to sync node", zap.Error(err))
+				}
+			},
+		})
+		supervisor.Signal(ctx, supervisor.SignalHealthy)
+		nodeInformer.Informer().Run(ctx.Done())
+		return ctx.Err()
+	}
+}
diff --git a/core/internal/kubernetes/clusternet/netlink_compat.go b/core/internal/kubernetes/clusternet/netlink_compat.go
new file mode 100644
index 0000000..a90cc47
--- /dev/null
+++ b/core/internal/kubernetes/clusternet/netlink_compat.go
@@ -0,0 +1,33 @@
+// Copyright 2020 The Monogon Project Authors.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Can be removed once https://github.com/vishvananda/netlink/pull/464 lands
+package clusternet
+
+import "github.com/vishvananda/netlink"
+
+// Wireguard represent links of type "wireguard", see https://www.wireguard.com/
+type Wireguard struct {
+	netlink.LinkAttrs
+}
+
+func (wg *Wireguard) Attrs() *netlink.LinkAttrs {
+	return &wg.LinkAttrs
+}
+
+func (wg *Wireguard) Type() string {
+	return "wireguard"
+}
diff --git a/core/internal/kubernetes/controller-manager.go b/core/internal/kubernetes/controller-manager.go
index 0934ae1..8a85a99 100644
--- a/core/internal/kubernetes/controller-manager.go
+++ b/core/internal/kubernetes/controller-manager.go
@@ -41,6 +41,8 @@
 	serverKey             []byte
 }
 
+var clusterNet = net.IPNet{IP: net.IP{10, 0, 0, 0}, Mask: net.IPMask{255, 255, 0, 0}}
+
 func getPKIControllerManagerConfig(ctx context.Context, kv clientv3.KV, kpki *pki.KubernetesPKI) (*controllerManagerConfig, error) {
 	var config controllerManagerConfig
 	var err error
@@ -84,7 +86,10 @@
 				pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: config.serverCert})),
 			args.FileOpt("--tls-private-key-file", "server-key.pem",
 				pem.EncodeToMemory(&pem.Block{Type: "PRIVATE KEY", Bytes: config.serverKey})),
+			"--allocate-node-cidrs",
+			"--cluster-cidr="+clusterNet.String(),
 		)
+
 		if args.Error() != nil {
 			return fmt.Errorf("failed to use fileargs: %w", err)
 		}
diff --git a/core/internal/kubernetes/service.go b/core/internal/kubernetes/service.go
index 826e2d8..ccfb41c 100644
--- a/core/internal/kubernetes/service.go
+++ b/core/internal/kubernetes/service.go
@@ -24,18 +24,18 @@
 	"os"
 	"time"
 
-	"k8s.io/client-go/informers"
-	"k8s.io/client-go/tools/clientcmd"
-
 	"go.etcd.io/etcd/clientv3"
 	"go.uber.org/zap"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
+	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/tools/clientcmd"
 
 	schema "git.monogon.dev/source/nexantic.git/core/generated/api"
 	"git.monogon.dev/source/nexantic.git/core/internal/common/supervisor"
 	"git.monogon.dev/source/nexantic.git/core/internal/consensus"
+	"git.monogon.dev/source/nexantic.git/core/internal/kubernetes/clusternet"
 	"git.monogon.dev/source/nexantic.git/core/internal/kubernetes/pki"
 	"git.monogon.dev/source/nexantic.git/core/internal/kubernetes/reconciler"
 	"git.monogon.dev/source/nexantic.git/core/internal/storage"
@@ -181,6 +181,11 @@
 			return fmt.Errorf("could not created kubelet config: %w", err)
 		}
 
+		key, err := clusternet.EnsureOnDiskKey()
+		if err != nil {
+			return fmt.Errorf("failed to ensure cluster key: %w", err)
+		}
+
 		for _, sub := range []struct {
 			name     string
 			runnable supervisor.Runnable
@@ -192,6 +197,7 @@
 			{"reconciler", reconciler.Run(clientSet)},
 			{"csi-plugin", runCSIPlugin(s.storageService)},
 			{"pv-provisioner", runCSIProvisioner(s.storageService, clientSet, informerFactory)},
+			{"clusternet", clusternet.Run(informerFactory, clusterNet, clientSet, key)},
 		} {
 			err := supervisor.Run(ctx, sub.name, sub.runnable)
 			if err != nil {
diff --git a/core/internal/network/main.go b/core/internal/network/main.go
index 2466e05..ac9ce46 100644
--- a/core/internal/network/main.go
+++ b/core/internal/network/main.go
@@ -19,6 +19,7 @@
 import (
 	"context"
 	"fmt"
+	"io/ioutil"
 	"net"
 	"os"
 
@@ -135,6 +136,10 @@
 		s.logger.Fatal("Failed to list network links", zap.Error(err))
 	}
 
+	if err := ioutil.WriteFile("/proc/sys/net/ipv4/ip_forward", []byte("1\n"), 0644); err != nil {
+		s.logger.Panic("Failed to enable IPv4 forwarding", zap.Error(err))
+	}
+
 	var ethernetLinks []netlink.Link
 	for _, link := range links {
 		attrs := link.Attrs()
diff --git a/core/pkg/jsonpatch/BUILD.bazel b/core/pkg/jsonpatch/BUILD.bazel
new file mode 100644
index 0000000..c54fcfa
--- /dev/null
+++ b/core/pkg/jsonpatch/BUILD.bazel
@@ -0,0 +1,14 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["jsonpatch.go.go"],
+    importpath = "git.monogon.dev/source/nexantic.git/core/pkg/jsonpatch",
+    visibility = ["//visibility:public"],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = ["jsonpatch_test.go"],
+    embed = [":go_default_library"],
+)
diff --git a/core/pkg/jsonpatch/jsonpatch.go.go b/core/pkg/jsonpatch/jsonpatch.go.go
new file mode 100644
index 0000000..9682980
--- /dev/null
+++ b/core/pkg/jsonpatch/jsonpatch.go.go
@@ -0,0 +1,44 @@
+// Copyright 2020 The Monogon Project Authors.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package jsonpatch contains data structures and encoders for JSON Patch (RFC 6902) and JSON Pointers (RFC 6901)
+package jsonpatch
+
+import "strings"
+
+// JSON Patch operation (RFC 6902 Section 4)
+type JsonPatchOp struct {
+	Operation string      `json:"op"`
+	Path      string      `json:"path"` // Technically a JSON Pointer, but called Path in the RFC
+	From      string      `json:"from,omitempty"`
+	Value     interface{} `json:"value,omitempty"`
+}
+
+// EncodeJSONRefToken encodes a JSON reference token as part of a JSON Pointer (RFC 6901 Section 2)
+func EncodeJSONRefToken(token string) string {
+	x := strings.ReplaceAll(token, "~", "~0")
+	return strings.ReplaceAll(x, "/", "~1")
+}
+
+// PointerFromParts returns an encoded JSON Pointer from parts
+func PointerFromParts(pathParts []string) string {
+	var encodedParts []string
+	encodedParts = append(encodedParts, "")
+	for _, part := range pathParts {
+		encodedParts = append(encodedParts, EncodeJSONRefToken(part))
+	}
+	return strings.Join(encodedParts, "/")
+}
diff --git a/core/pkg/jsonpatch/jsonpatch_test.go b/core/pkg/jsonpatch/jsonpatch_test.go
new file mode 100644
index 0000000..33a56ba
--- /dev/null
+++ b/core/pkg/jsonpatch/jsonpatch_test.go
@@ -0,0 +1,66 @@
+// Copyright 2020 The Monogon Project Authors.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package jsonpatch
+
+import (
+	"testing"
+)
+
+func TestEncodeJSONRefToken(t *testing.T) {
+	tests := []struct {
+		name  string
+		token string
+		want  string
+	}{
+		{"Passes through normal characters", "asdf123", "asdf123"},
+		{"Encodes simple slashes", "a/b", "a~1b"},
+		{"Encodes tildes", "m~n", "m~0n"},
+		{"Encodes bot tildes and slashes", "a/m~n", "a~1m~0n"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := EncodeJSONRefToken(tt.token); got != tt.want {
+				t.Errorf("EncodeJSONRefToken() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestPointerFromParts(t *testing.T) {
+	type args struct {
+		pathParts []string
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{"Empty path", args{[]string{}}, ""},
+		{"Single level path", args{[]string{"foo"}}, "/foo"},
+		{"Multi-level path", args{[]string{"foo", "0"}}, "/foo/0"},
+		{"Path starting with empty key", args{[]string{""}}, "/"},
+		{"Path with part containing /", args{[]string{"a/b"}}, "/a~1b"},
+		{"Path with part containing spaces", args{[]string{" "}}, "/ "},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := PointerFromParts(tt.args.pathParts); got != tt.want {
+				t.Errorf("PointerFromParts() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
diff --git a/third_party/go/repositories.bzl b/third_party/go/repositories.bzl
index b011d53..c4e21c6 100644
--- a/third_party/go/repositories.bzl
+++ b/third_party/go/repositories.bzl
@@ -1001,10 +1001,16 @@
         sum = "h1:lez6TS6aAau+8wXUP3G9I3TGlmPFEq2CTxBaRqY6AGE=",
     )
     go_repository(
+        name = "com_github_mdlayher_genetlink",
+        importpath = "github.com/mdlayher/genetlink",
+        version = "v1.0.0",
+        sum = "h1:OoHN1OdyEIkScEmRgxLEe2M9U8ClMytqA5niynLtfj0=",
+    )
+    go_repository(
         name = "com_github_mdlayher_netlink",
         importpath = "github.com/mdlayher/netlink",
-        version = "v0.0.0-20191009155606-de872b0d824b",
-        sum = "h1:W3er9pI7mt2gOqOWzwvx20iJ8Akiqz1mUMTxU6wdvl8=",
+        version = "v1.1.0",
+        sum = "h1:mpdLgm+brq10nI9zM1BpX1kpDbh3NLl3RSnVq6ZSkfg=",
     )
     go_repository(
         name = "com_github_mdlayher_raw",
@@ -1529,6 +1535,12 @@
         sum = "h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=",
     )
     go_repository(
+        name = "com_zx2c4_golang_wireguard_wgctrl",
+        importpath = "golang.zx2c4.com/wireguard/wgctrl",
+        version = "v0.0.0-20200515170644-ec7f26be9d9e",
+        sum = "h1:fqDhK9OlzaaiFjnyaAfR9Q1RPKCK7OCTLlHGP9f74Nk=",
+    )
+    go_repository(
         name = "org_gonum_v1_gonum",
         importpath = "gonum.org/v1/gonum",
         version = "v0.6.2",
diff --git a/third_party/go/shelf.pb.text b/third_party/go/shelf.pb.text
index fbd8670..85372be 100644
--- a/third_party/go/shelf.pb.text
+++ b/third_party/go/shelf.pb.text
@@ -1504,11 +1504,18 @@
   semver: "v0.0.0-20190606142754-0394541c37b7"
 >
 entry: <
+  import_path: "github.com/mdlayher/genetlink"
+  version: "v1.0.0"
+  bazel_name: "com_github_mdlayher_genetlink"
+  sum: "h1:OoHN1OdyEIkScEmRgxLEe2M9U8ClMytqA5niynLtfj0="
+  semver: "v1.0.0"
+>
+entry: <
   import_path: "github.com/mdlayher/netlink"
-  version: "v0.0.0-20191009155606-de872b0d824b"
+  version: "v1.1.0"
   bazel_name: "com_github_mdlayher_netlink"
-  sum: "h1:W3er9pI7mt2gOqOWzwvx20iJ8Akiqz1mUMTxU6wdvl8="
-  semver: "v0.0.0-20191009155606-de872b0d824b"
+  sum: "h1:mpdLgm+brq10nI9zM1BpX1kpDbh3NLl3RSnVq6ZSkfg="
+  semver: "v1.1.0"
 >
 entry: <
   import_path: "github.com/mdlayher/raw"
@@ -2393,6 +2400,13 @@
   semver: "v0.0.0-20191204190536-9bdfabe68543"
 >
 entry: <
+  import_path: "golang.zx2c4.com/wireguard/wgctrl"
+  version: "ec7f26be9d9e47a32a2789f8c346031978485cbf"
+  bazel_name: "com_zx2c4_golang_wireguard_wgctrl"
+  sum: "h1:fqDhK9OlzaaiFjnyaAfR9Q1RPKCK7OCTLlHGP9f74Nk="
+  semver: "v0.0.0-20200515170644-ec7f26be9d9e"
+>
+entry: <
   import_path: "gonum.org/v1/gonum"
   version: "v0.6.2"
   bazel_name: "org_gonum_v1_gonum"