diff --git a/docs/_data/navigation.yml b/docs/_data/navigation.yml
index 0bdfae9a..ca0048ec 100644
--- a/docs/_data/navigation.yml
+++ b/docs/_data/navigation.yml
@@ -55,8 +55,13 @@
       url: "/housekeeping-repo-location"
     - title: "Forks"
       url: "/housekeeping-forks"
-    - title: "Failed Webhooks"
-      url: "/housekeeping-failed-webhooks"
+- title: "Failures"
+  url: "/failures-failed-authentication"
+  subnavigation:
+    - title: "Authentication"
+      url: "/failures-failed-authentication"
+    - title: "Webhooks"
+      url: "/failures-failed-webhooks"
 - title: "Recommendations"
   url: "/recommendations-tokenless-auth"
   subnavigation:
diff --git a/docs/demo-data/failed-auth-detailed.tsv b/docs/demo-data/failed-auth-detailed.tsv
new file mode 100644
index 00000000..0cac0931
--- /dev/null
+++ b/docs/demo-data/failed-auth-detailed.tsv
@@ -0,0 +1,13 @@
+user	count
+tom	105
+mary	96
+jane	48
+mike	48
+bob	40
+bill	33
+sue	16
+cindy	9
+joe	3
+buildbot	3
+deploybot	3
+testbot	3
diff --git a/docs/demo-data/failed-auth.tsv b/docs/demo-data/failed-auth.tsv
new file mode 100644
index 00000000..37624b36
--- /dev/null
+++ b/docs/demo-data/failed-auth.tsv
@@ -0,0 +1,7 @@
+date	failed authentication
+2020-12-01	1005
+2020-12-02	352
+2020-12-03	564
+2020-12-04	410
+2020-12-05	455
+2020-12-06	407
diff --git a/docs/failures-failed-authentication.html b/docs/failures-failed-authentication.html
new file mode 100644
index 00000000..40308020
--- /dev/null
+++ b/docs/failures-failed-authentication.html
@@ -0,0 +1,59 @@
+---
+layout: default
+title: Failed Authentication
+permalink: /failures-failed-authentication
+---
+
+<div class="chart-placeholder">
+	<h3>Failed Authentication</h3>
+	<canvas
+		data-url="{{ site.dataURL }}/failed-auth.tsv"
+		data-type="history"
+		data-config='{
+			"views":
+			[
+				{
+					"label": "2 m",
+					"tooltip": "Show the last 2 months",
+					"aggregate": false,
+					"slice": [0, 61],
+					"default": true
+				},
+				{
+					"label": "2 y",
+					"tooltip": "Show the last 2 years",
+					"aggregate":
+					{
+						"period": "week",
+						"method": "sum"
+					},
+					"slice": [0, 106]
+				},
+				{
+					"label": "all",
+					"tooltip": "Show all data",
+					"aggregate":
+					{
+						"period": "week",
+						"method": "sum"
+					}
+				}
+			]
+		}'></canvas>
+	<div class="info-box">
+		<p>
+			Looking at failed authentication attempts across the system is helpful in spotting misconfigured systems that may be tying up authentication workers.
+		</p>
+		<p>
+			For example, users may have changed credentials used to access GitHub, however they failed to update CI/CD systems using those credentials. Another example is that a CI/CD system
+			may be configured with a user account which is no longer active in GitHub and/or your company.
+		</p>
+		<p>
+			Therefore, you should try to reduce them.
+		</p>
+	</div>
+</div>
+
+<div class="chart-placeholder">
+	<table data-url="{{ site.dataURL }}/failed-auth-detailed.tsv" data-type="table"></table>
+</div>
diff --git a/docs/housekeeping-failed-webhooks.html b/docs/failures-failed-webhooks.html
similarity index 98%
rename from docs/housekeeping-failed-webhooks.html
rename to docs/failures-failed-webhooks.html
index 30231d5d..bc06e0a1 100644
--- a/docs/housekeeping-failed-webhooks.html
+++ b/docs/failures-failed-webhooks.html
@@ -1,7 +1,7 @@
 ---
 layout: default
 title: Failed Webhooks
-permalink: /housekeeping-failed-webhooks
+permalink: /failures-failed-webhooks
 ---
 
 <div class="chart-placeholder">
diff --git a/updater/reports/ReportFailedAuth.py b/updater/reports/ReportFailedAuth.py
new file mode 100644
index 00000000..4916785f
--- /dev/null
+++ b/updater/reports/ReportFailedAuth.py
@@ -0,0 +1,19 @@
+from .ReportDaily import *
+
+# Report how many failed authentication attempts
+class ReportFailedAuth(ReportDaily):
+	def name(self):
+		return "failed-auth"
+
+	def updateDailyData(self):
+		self.detailedHeader, newData = self.parseData(
+			self.executeScript(self.scriptPath("failed-auth.sh")))
+		self.header = ["date", "failed authentication"]
+		self.data.append(
+			[
+				str(self.yesterday()),
+				sum(map(lambda x: int(x[4] if len(x) > 3 else 0), newData)),
+			])
+		self.detailedData = newData[:25]
+		self.truncateData(self.timeRangeTotal())
+		self.sortDataByDate()
diff --git a/updater/scripts/failed-auth.sh b/updater/scripts/failed-auth.sh
new file mode 100755
index 00000000..0162d225
--- /dev/null
+++ b/updater/scripts/failed-auth.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+#
+# List failed authentication attempts
+#
+
+echo -e "user\tcount"
+
+zcat -f /var/log/github/auth.log.1* |
+	 grep -hF 'at=failure' |
+	 grep -vF 'raw_login=nil' |
+	 grep -oP ' login=.+?(?=raw_login)' |
+	 grep -v 'https' |
+	 grep -vF 'login=nil' |
+	 grep -vF 'login=api' |
+	 grep -vF 'login=git' |
+	 perl -lape 's/login=//' |
+	 sort |
+	 uniq -ic |
+	 sort -rn |
+	 awk '{printf("%s\t%s\n",$2,$1)}'
diff --git a/updater/update-stats.py b/updater/update-stats.py
index 3998e7aa..e75cb668 100755
--- a/updater/update-stats.py
+++ b/updater/update-stats.py
@@ -12,6 +12,7 @@
 from reports.ReportAPIRequestsByUser import *
 from reports.ReportContributorsByOrg import *
 from reports.ReportContributorsByRepo import *
+from reports.ReportFailedAuth import *
 from reports.ReportFailedWebhooks import *
 from reports.ReportForksToOrgs import *
 from reports.ReportGitDownload import *
@@ -81,6 +82,7 @@ def main():
 	ReportAPIRequestsByUser(configuration, dataDirectory, metaStats).update()
 	ReportContributorsByOrg(configuration, dataDirectory, metaStats).update()
 	ReportContributorsByRepo(configuration, dataDirectory, metaStats).update()
+	ReportFailedAuth(configuration, dataDirectory, metaStats).update()
 	ReportFailedWebhooks(configuration, dataDirectory, metaStats).update()
 	ReportForksToOrgs(configuration, dataDirectory, metaStats).update()
 	ReportGitDownload(configuration, dataDirectory, metaStats).update()