diff --git a/data/hostname/cassandra01.internal.softwareheritage.org.yaml b/data/hostname/cassandra01.internal.softwareheritage.org.yaml
index e17741b2..7dc8c7b5 100644
--- a/data/hostname/cassandra01.internal.softwareheritage.org.yaml
+++ b/data/hostname/cassandra01.internal.softwareheritage.org.yaml
@@ -1,6 +1,9 @@
 # local cache is not compatible with rancher in docker
 dns::local_cache: false
 
 swh::apt_config::enable_non_free: true
 packages:
   - zfs-dkms
+
+dns::nameservers:
+  - 192.168.100.29
diff --git a/data/hostname/cassandra02.internal.softwareheritage.org.yaml b/data/hostname/cassandra02.internal.softwareheritage.org.yaml
index e17741b2..7dc8c7b5 100644
--- a/data/hostname/cassandra02.internal.softwareheritage.org.yaml
+++ b/data/hostname/cassandra02.internal.softwareheritage.org.yaml
@@ -1,6 +1,9 @@
 # local cache is not compatible with rancher in docker
 dns::local_cache: false
 
 swh::apt_config::enable_non_free: true
 packages:
   - zfs-dkms
+
+dns::nameservers:
+  - 192.168.100.29
diff --git a/data/hostname/cassandra03.internal.softwareheritage.org.yaml b/data/hostname/cassandra03.internal.softwareheritage.org.yaml
index e17741b2..7dc8c7b5 100644
--- a/data/hostname/cassandra03.internal.softwareheritage.org.yaml
+++ b/data/hostname/cassandra03.internal.softwareheritage.org.yaml
@@ -1,6 +1,9 @@
 # local cache is not compatible with rancher in docker
 dns::local_cache: false
 
 swh::apt_config::enable_non_free: true
 packages:
   - zfs-dkms
+
+dns::nameservers:
+  - 192.168.100.29
diff --git a/data/hostname/cassandra04.internal.softwareheritage.org.yaml b/data/hostname/cassandra04.internal.softwareheritage.org.yaml
index e17741b2..7dc8c7b5 100644
--- a/data/hostname/cassandra04.internal.softwareheritage.org.yaml
+++ b/data/hostname/cassandra04.internal.softwareheritage.org.yaml
@@ -1,6 +1,9 @@
 # local cache is not compatible with rancher in docker
 dns::local_cache: false
 
 swh::apt_config::enable_non_free: true
 packages:
   - zfs-dkms
+
+dns::nameservers:
+  - 192.168.100.29
diff --git a/data/hostname/cassandra05.internal.softwareheritage.org.yaml b/data/hostname/cassandra05.internal.softwareheritage.org.yaml
index e17741b2..7dc8c7b5 100644
--- a/data/hostname/cassandra05.internal.softwareheritage.org.yaml
+++ b/data/hostname/cassandra05.internal.softwareheritage.org.yaml
@@ -1,6 +1,9 @@
 # local cache is not compatible with rancher in docker
 dns::local_cache: false
 
 swh::apt_config::enable_non_free: true
 packages:
   - zfs-dkms
+
+dns::nameservers:
+  - 192.168.100.29
diff --git a/data/hostname/cassandra06.internal.softwareheritage.org.yaml b/data/hostname/cassandra06.internal.softwareheritage.org.yaml
index e17741b2..7dc8c7b5 100644
--- a/data/hostname/cassandra06.internal.softwareheritage.org.yaml
+++ b/data/hostname/cassandra06.internal.softwareheritage.org.yaml
@@ -1,6 +1,9 @@
 # local cache is not compatible with rancher in docker
 dns::local_cache: false
 
 swh::apt_config::enable_non_free: true
 packages:
   - zfs-dkms
+
+dns::nameservers:
+  - 192.168.100.29
diff --git a/data/hostname/rancher-node-cassandra1.internal.softwareheritage.org.yaml b/data/hostname/rancher-node-cassandra1.internal.softwareheritage.org.yaml
index d5948c40..551a0587 100644
--- a/data/hostname/rancher-node-cassandra1.internal.softwareheritage.org.yaml
+++ b/data/hostname/rancher-node-cassandra1.internal.softwareheritage.org.yaml
@@ -1,2 +1,5 @@
 # local cache is not compatible with rancher in docker
 dns::local_cache: false
+
+dns::nameservers:
+  - 192.168.100.29
diff --git a/data/hostname/rancher-node-cassandra2.internal.softwareheritage.org.yaml b/data/hostname/rancher-node-cassandra2.internal.softwareheritage.org.yaml
index d5948c40..551a0587 100644
--- a/data/hostname/rancher-node-cassandra2.internal.softwareheritage.org.yaml
+++ b/data/hostname/rancher-node-cassandra2.internal.softwareheritage.org.yaml
@@ -1,2 +1,5 @@
 # local cache is not compatible with rancher in docker
 dns::local_cache: false
+
+dns::nameservers:
+  - 192.168.100.29
diff --git a/data/hostname/rancher-node-cassandra3.internal.softwareheritage.org.yaml b/data/hostname/rancher-node-cassandra3.internal.softwareheritage.org.yaml
index d5948c40..551a0587 100644
--- a/data/hostname/rancher-node-cassandra3.internal.softwareheritage.org.yaml
+++ b/data/hostname/rancher-node-cassandra3.internal.softwareheritage.org.yaml
@@ -1,2 +1,5 @@
 # local cache is not compatible with rancher in docker
 dns::local_cache: false
+
+dns::nameservers:
+  - 192.168.100.29