diff --git a/deployment/scripts/sync_initial_messages.py b/deployment/scripts/sync_initial_messages.py
new file mode 100644
index 000000000..a2151c9a6
--- /dev/null
+++ b/deployment/scripts/sync_initial_messages.py
@@ -0,0 +1,43 @@
+import requests
+import json
+import logging
+
+logging.basicConfig(level=logging.DEBUG)
+logger = logging.getLogger(__name__)
+
+initial_messages_list = [
+    # Diagnostic VMs
+    "cad11970efe9b7478300fd04d7cc91c646ca0a792b9cc718650f86e1ccfac73e",  # Initial program
+    "3fc0aa9569da840c43e7bd2033c3c580abb46b007527d6d20f2d4e98e867f7af",  # DiagVM
+    "67705389842a0a1b95eaa408b009741027964edc805997475e95c505d642edd8",  # Legacy Diag VM
+    # Volumes like runtimes, data, code, etc
+    "6b8618f5b8913c0f582f1a771a154a556ee3fa3437ef3cf91097819910cf383b",  # Diag VM code volume
+    "f873715dc2feec3833074bd4b8745363a0e0093746b987b4c8191268883b2463",  # Diag VM runtime volume
+    "a92c81992e885d7a554fa78e255a5802404b7fdde5fbff20a443ccd13020d139",  # Legacy Diag VM code volume
+    "bd79839bf96e595a06da5ac0b6ba51dea6f7e2591bb913deccded04d831d29f4",  # Legacy Diag VM runtime volume
+]
+
+FROM_CCN = "http://api1.aleph.im"
+TO_CCN = "http://api2.aleph.im"
+PUB_SUB_TOPIC = "ALEPH-TEST"
+item_hashes_to_sync = ",".join(initial_messages_list)
+
+logger.debug(f"Fetching messages from {FROM_CCN}...")
+m1 = requests.get(f"{FROM_CCN}/api/v0/messages.json?pagination=50000&refs={item_hashes_to_sync}")
+m1 = m1.json()['messages']
+logger.debug(f"Fetched {len(m1)} messages from {FROM_CCN}")
+
+logger.debug(f"Fetching messages from {TO_CCN}")
+m2 = requests.get(f"{TO_CCN}/api/v0/messages.json?pagination=50000&refs={item_hashes_to_sync}")
+m2 = m2.json()['messages']
+logger.debug(f"Fetched {len(m2)} messages from {TO_CCN}")
+
+m1_hashes = set(m["item_hash"] for m in m1)
+m2_hashes = set(m["item_hash"] for m in m2)
+hashes_to_sync = m1_hashes - m2_hashes
+messages_to_sync = (m for m in m1 if m["item_hash"] in hashes_to_sync)  # Use a generator to avoid memory issues
+
+logger.info(f"Messages to sync to {TO_CCN}: {len(hashes_to_sync)}")
+for message in messages_to_sync:
+    requests.post(f"{TO_CCN}/api/v0/ipfs/pubsub/pub",
+                  json={"topic": PUB_SUB_TOPIC, "data": json.dumps(message)})
diff --git a/docs/guides/private_net.rst b/docs/guides/private_net.rst
index 567b71976..840e9810d 100644
--- a/docs/guides/private_net.rst
+++ b/docs/guides/private_net.rst
@@ -105,3 +105,15 @@ Here is a config file that summarizes the different requirements to create your
 
 
 Refer to the install guide for explanations on how to set up your node(s).
+
+Initial messages synchronization
+-------------------
+
+There are some messages needed to run a private CRN, like the diagnostic VM, standard runtimes, etc.
+Running this python script, it will sync this initial messages to the private node.
+
+
+.. code-block:: bash
+
+    python3 ./deployment/scripts/sync_initial_messages.py
+