diff --git a/lib/filters/nodefilter.js b/lib/filters/nodefilter.js
index e4e979d..920352d 100644
--- a/lib/filters/nodefilter.js
+++ b/lib/filters/nodefilter.js
@@ -24,7 +24,7 @@ define([], function () {
       })
 
       n.graph.links = data.graph.links.filter( function (d) {
-        return filteredIds.has(d.source.id) && filteredIds.has(d.target.id)
+        return !d.sourceid || (filteredIds.has(d.source.id) && filteredIds.has(d.target.id))
       })
 
       return n
diff --git a/lib/forcegraph.js b/lib/forcegraph.js
index 2cf49f3..995fd8a 100644
--- a/lib/forcegraph.js
+++ b/lib/forcegraph.js
@@ -685,7 +685,7 @@ define(["d3"], function (d3) {
         d.source.neighbours[d.target.o.id] = {node: d.target, link: d}
         d.target.neighbours[d.source.o.id] = {node: d.source, link: d}
 
-        if (d.o.source.node && d.o.target.node)
+        if (d.o.source && d.o.target)
           linksDict[d.o.id] = d
       })
 
diff --git a/lib/infobox/link.js b/lib/infobox/link.js
index acbb432..df91163 100644
--- a/lib/infobox/link.js
+++ b/lib/infobox/link.js
@@ -1,10 +1,13 @@
 define(function () {
   return function (config, el, router, d) {
+    var unknown = !(d.source.node)
     var h2 = document.createElement("h2")
     var a1 = document.createElement("a")
-    a1.href = "#"
-    a1.onclick = router.node(d.source.node)
-    a1.textContent = d.source.node.nodeinfo.hostname
+    if (!unknown) {
+      a1.href = "#"
+      a1.onclick = router.node(d.source.node)
+    }
+    a1.textContent = unknown ? d.source.id : d.source.node.nodeinfo.hostname
     h2.appendChild(a1)
     h2.appendChild(document.createTextNode(" → "))
     var a2 = document.createElement("a")
@@ -20,7 +23,7 @@ define(function () {
     attributeEntry(attributes, "TQ", showTq(d))
     attributeEntry(attributes, "Entfernung", showDistance(d))
     attributeEntry(attributes, "Typ", d.type)
-    var hw1 = dictGet(d.source.node.nodeinfo, ["hardware", "model"])
+    var hw1 = unknown ? null : dictGet(d.source.node.nodeinfo, ["hardware", "model"])
     var hw2 = dictGet(d.target.node.nodeinfo, ["hardware", "model"])
     attributeEntry(attributes, "Hardware", (hw1 != null ? hw1 : "unbekannt") + " – " + (hw2 != null ? hw2 : "unbekannt"))
 
diff --git a/lib/infobox/node.js b/lib/infobox/node.js
index 90b00d8..39b8183 100644
--- a/lib/infobox/node.js
+++ b/lib/infobox/node.js
@@ -326,6 +326,7 @@ define(["moment", "numeral", "tablesort", "tablesort.numeric"],
       var tbody = document.createElement("tbody")
 
       d.neighbours.forEach( function (d) {
+        var unknown = !(d.node)
         var tr = document.createElement("tr")
 
         var td1 = document.createElement("td")
@@ -335,12 +336,13 @@ define(["moment", "numeral", "tablesort", "tablesort.numeric"],
         var td2 = document.createElement("td")
         var a1 = document.createElement("a")
         a1.classList.add("hostname")
-        a1.textContent = d.node.nodeinfo.hostname
-        a1.href = "#"
-        a1.onclick = router.node(d.node)
+        a1.textContent = unknown ? d.id : d.node.nodeinfo.hostname
+        if (!unknown)
+          a1.href = "#"
+          a1.onclick = router.node(d.node)
         td2.appendChild(a1)
 
-        if (has_location(d.node)) {
+        if (!unknown && has_location(d.node)) {
           var span = document.createElement("span")
           span.classList.add("icon")
           span.classList.add("ion-location")
diff --git a/lib/linklist.js b/lib/linklist.js
index e195dde..1fc8574 100644
--- a/lib/linklist.js
+++ b/lib/linklist.js
@@ -1,6 +1,6 @@
 define(["sorttable", "virtual-dom"], function (SortTable, V) {
   function linkName(d) {
-    return d.source.node.nodeinfo.hostname + " – " + d.target.node.nodeinfo.hostname
+    return (d.source.node ? d.source.node.nodeinfo.hostname : d.source.id) + " – " + d.target.node.nodeinfo.hostname
   }
 
   var headings = [{ name: "Knoten",
diff --git a/lib/main.js b/lib/main.js
index e12cd92..38f85e3 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -66,10 +66,7 @@ function (moment, Router, L, GUI, numeral) {
       })
 
       graph.links.forEach( function (d) {
-        if (graph.nodes[d.source].node)
-          d.source = graph.nodes[d.source]
-        else
-          d.source = undefined
+        d.source = graph.nodes[d.source]
 
         if (graph.nodes[d.target].node)
           d.target = graph.nodes[d.target]
@@ -78,14 +75,19 @@ function (moment, Router, L, GUI, numeral) {
       })
 
       var links = graph.links.filter( function (d) {
-        return d.source !== undefined && d.target !== undefined
+        return d.target !== undefined
       })
 
       links.forEach( function (d) {
-        var ids = [d.source.node.nodeinfo.node_id, d.target.node.nodeinfo.node_id]
-        d.id = ids.sort().join("-")
+        var unknown = (d.source.node === undefined)
+        var ids
+        if (unknown)
+          ids = [d.source.id.replace(/:/g, ""), d.target.node.nodeinfo.node_id]
+        else
+          ids = [d.source.node.nodeinfo.node_id, d.target.node.nodeinfo.node_id]
+        d.id = ids.join("-")
 
-        if (!("location" in d.source.node.nodeinfo && "location" in d.target.node.nodeinfo))
+        if (unknown || !("location" in d.source.node.nodeinfo && "location" in d.target.node.nodeinfo))
           return
 
         d.latlngs = []
@@ -100,10 +102,6 @@ function (moment, Router, L, GUI, numeral) {
       })
 
       links.forEach( function (d) {
-        d.source.node.neighbours.push({ node: d.target.node, link: d, incoming: false })
-        d.target.node.neighbours.push({ node: d.source.node, link: d, incoming: true })
-        if (d.type !== "tunnel")
-          d.source.node.meshlinks = d.source.node.meshlinks ? d.source.node.meshlinks + 1 : 1
         if (d.type === "tunnel")
           d.type = "VPN"
         else if (d.type === "wireless")
@@ -112,6 +110,15 @@ function (moment, Router, L, GUI, numeral) {
           d.type = "Kabel"
         else
           d.type = "N/A"
+        var unknown = (d.source.node === undefined)
+        if (unknown) {
+          d.target.node.neighbours.push({ id: d.source.id, link: d, incoming: true })
+          return
+        }
+        d.source.node.neighbours.push({ node: d.target.node, link: d, incoming: false })
+        d.target.node.neighbours.push({ node: d.source.node, link: d, incoming: true })
+        if (d.type !== "VPN")
+          d.source.node.meshlinks = d.source.node.meshlinks ? d.source.node.meshlinks + 1 : 1
       })
 
       links.sort( function (a, b) {
diff --git a/lib/title.js b/lib/title.js
index 372dd75..e9377a4 100644
--- a/lib/title.js
+++ b/lib/title.js
@@ -20,7 +20,7 @@ define(function () {
 
     this.gotoLink = function (d) {
       if (d)
-        setTitle(d.source.node.nodeinfo.hostname + " – " + d.target.node.nodeinfo.hostname)
+        setTitle((d.source.node ? d.source.node.nodeinfo.hostname : d.source.id) + " – " + d.target.node.nodeinfo.hostname)
     }
 
     this.gotoLocation = function() {