diff --git a/data/hostname/rancher-node-production-worker01.internal.softwareheritage.org.yaml b/data/hostname/rancher-node-production-worker01.internal.softwareheritage.org.yaml
--- a/data/hostname/rancher-node-production-worker01.internal.softwareheritage.org.yaml
+++ b/data/hostname/rancher-node-production-worker01.internal.softwareheritage.org.yaml
@@ -2,6 +2,7 @@
 dns::local_cache: false
 dns::nameservers:
   - 192.168.100.29
+  - ns0.euwest.azure.internal.softwareheritage.org
 
 icinga2::host::vars:
   load: high
diff --git a/data/hostname/rancher-node-production-worker02.internal.softwareheritage.org.yaml b/data/hostname/rancher-node-production-worker02.internal.softwareheritage.org.yaml
--- a/data/hostname/rancher-node-production-worker02.internal.softwareheritage.org.yaml
+++ b/data/hostname/rancher-node-production-worker02.internal.softwareheritage.org.yaml
@@ -2,6 +2,7 @@
 dns::local_cache: false
 dns::nameservers:
   - 192.168.100.29
+  - ns0.euwest.azure.internal.softwareheritage.org
 
 icinga2::host::vars:
   load: high
diff --git a/data/hostname/rancher-node-production-worker03.internal.softwareheritage.org.yaml b/data/hostname/rancher-node-production-worker03.internal.softwareheritage.org.yaml
--- a/data/hostname/rancher-node-production-worker03.internal.softwareheritage.org.yaml
+++ b/data/hostname/rancher-node-production-worker03.internal.softwareheritage.org.yaml
@@ -2,6 +2,7 @@
 dns::local_cache: false
 dns::nameservers:
   - 192.168.100.29
+  - ns0.euwest.azure.internal.softwareheritage.org
 
 icinga2::host::vars:
   load: high
diff --git a/data/hostname/rancher-node-production-worker04.internal.softwareheritage.org.yaml b/data/hostname/rancher-node-production-worker04.internal.softwareheritage.org.yaml
--- a/data/hostname/rancher-node-production-worker04.internal.softwareheritage.org.yaml
+++ b/data/hostname/rancher-node-production-worker04.internal.softwareheritage.org.yaml
@@ -2,6 +2,7 @@
 dns::local_cache: false
 dns::nameservers:
   - 192.168.100.29
+  - ns0.euwest.azure.internal.softwareheritage.org
 
 icinga2::host::vars:
   load: high