diff --git a/groups/all.py b/groups/all.py
index 51eb6b9..428676c 100644
--- a/groups/all.py
+++ b/groups/all.py
@@ -2,8 +2,13 @@ groups['all'] = {
     'member_patterns': {
         r".*",
     },
+    'subgroups': {
+        # This is only needed because we're overriding stuff in the group.
+        'home',
+    },
     'bundles': {
         'apt',
+        'backup-client',
         'cron',
         'hostname',
         'postfix',
@@ -19,6 +24,9 @@ groups['all'] = {
                 'mail': 'hostmaster@kunsmann.eu',
             },
         },
+        'backup-client': {
+            'server': 'franzi-home.kunbox.net',
+        },
     },
     'pip_command': 'pip3',
 }
diff --git a/groups/locations.py b/groups/locations.py
index ad40492..0a64000 100644
--- a/groups/locations.py
+++ b/groups/locations.py
@@ -55,6 +55,9 @@ groups['home'] = {
             # than our own domains.
             'relayhost': '[mx0.kunbox.net]:2525',
         },
+        'backup-client': {
+            'server': '172.19.138.20',
+        },
     },
 }
 
diff --git a/nodes/gce/dns02.py b/nodes/gce/dns02.py
index 7e2120f..2fbb6ca 100644
--- a/nodes/gce/dns02.py
+++ b/nodes/gce/dns02.py
@@ -17,6 +17,9 @@ nodes['gce.dns02'] = {
             },
         },
         'external_ipv4': '35.187.109.249',
+        'backups': {
+            'exclude_from_backups': True,
+        },
         'powerdns': {
             'my_hostname': 'ns-2.kunbox.net',
         },
diff --git a/nodes/gce/dns03.py b/nodes/gce/dns03.py
index 60d31c4..3259f17 100644
--- a/nodes/gce/dns03.py
+++ b/nodes/gce/dns03.py
@@ -17,6 +17,9 @@ nodes['gce.dns03'] = {
             },
         },
         'external_ipv4': '35.228.143.71',
+        'backups': {
+            'exclude_from_backups': True,
+        },
         'powerdns': {
             'my_hostname': 'ns-3.kunbox.net',
         },
diff --git a/nodes/htz-cloud/pirmasens.py b/nodes/htz-cloud/pirmasens.py
index b48fbc7..f6e08d6 100644
--- a/nodes/htz-cloud/pirmasens.py
+++ b/nodes/htz-cloud/pirmasens.py
@@ -25,9 +25,6 @@ nodes['htz-cloud.pirmasens'] = {
                 'redis': {},
             },
         },
-        'cron': {
-            'backup': '0 2 * * *    root    /root/backup.sh',
-        },
         'nginx': {
             'vhosts': {
                 'mail.kunsmann.info': {
diff --git a/nodes/htz/ex42-1048908.py b/nodes/htz/ex42-1048908.py
index 05741cf..39cddbc 100644
--- a/nodes/htz/ex42-1048908.py
+++ b/nodes/htz/ex42-1048908.py
@@ -70,9 +70,16 @@ nodes['htz.ex42-1048908'] = {
                 },
             },
         },
+        'backups': {
+            'paths': {
+                '/home/kunsi/.weechat',
+                '/opt/matrix/matrix-dimension',
+                '/opt/matrix/matrix-media-repo',
+                '/var/matrix',
+            },
+        },
         'cron': {
             # TODO move to a proper bundle
-            'backup': '0 1 * * *    root    /root/backup.sh',
             'restart_mautrix_whatsapp': '0 3 * * *    root    systemctl restart matrix-bridge-whatsapp.service',
             'telekom_nervkram': vault.decrypt('encrypt$gAAAAABfqXi23M96wrSLhqlbhqgePYX06LjPXfyQU2y_07kqYYLztj_PhS1-dk4r5FiiL2Ofmx5iCKW1sZNqiQSuHj2uKaitH0GnwHqj5CI2JwkAS9HrFxw=').format_into('0 0 * * *    root    date | mail -s \'daily test mail \' -r postmaster@mx0.kunbox.net {}'),
         },
diff --git a/nodes/rx300.py b/nodes/rx300.py
index 7232492..616c5cd 100644
--- a/nodes/rx300.py
+++ b/nodes/rx300.py
@@ -24,6 +24,9 @@ nodes['rx300'] = {
                 'dhcp': True,
             },
         },
+        'backups': {
+            'exclude_from_backups': True,
+        },
         'zfs': {
             'module_options': {
                 'zfs_arc_max_mb': 16384, # 16GB