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AWS mgn documentation change

Service: mgn · 2026-06-16 · Documentation low

File: mgn/latest/ug/preparing-environments.md

Summary

Added network requirements section for FSx for ONTAP storage integration, including required ports, security group configurations, and package installation prerequisites.

Security assessment

The change documents security configurations (ports 3260/TCP and 443/TCP) and security group requirements for FSx for ONTAP integration but does not address a specific vulnerability or incident. It provides standard operational guidance for secure network setup.

Diff

diff --git a/mgn/latest/ug/preparing-environments.md b/mgn/latest/ug/preparing-environments.md
index e7e7830e4..7acc0bf85 100644
--- a//mgn/latest/ug/preparing-environments.md
+++ b//mgn/latest/ug/preparing-environments.md
@@ -99,0 +100,2 @@ SSL interception should not be applied for communication between replication ser
+  * Network requirements for FSx for ONTAP
+
@@ -261,0 +264,15 @@ Without access to the AL2023 package repository, replication servers may fail to
+### Network requirements for FSx for ONTAP
+
+When using FSx for ONTAP as the target storage type, the following additional network connectivity is required between the target instances and the FSx for ONTAP file system.
+
+Port | Protocol | Direction | Purpose  
+---|---|---|---  
+3260 | TCP | Target instance → FSx for ONTAP | iSCSI data transfer for block storage replication  
+443 | TCP | Target instance → FSx for ONTAP | ONTAP REST API for storage management (certificate-based authentication)  
+  
+These ports must be allowed in the security groups attached to both the target instances and the FSx for ONTAP file system. For detailed security group configuration, see [Step 1: Configure security groups](./fsx-ontap.html#fsx-ontap-step1-security-groups) in the [FSx for ONTAP configuration guide](./fsx-ontap.html).
+
+###### Note
+
+The target instance also requires outbound internet access or access to OS package repositories to install iSCSI initiator and multipath tools. For details, see [Step 6: Configure launch template and launch settings](./fsx-ontap.html#fsx-ontap-step6-launch-settings).
+
@@ -286 +303 @@ These instructions are intended for the default OS firewall and allow outbound c
-  4. If the Enabled status of the rule is **No** , right-click it and select **Enable Rule** from the pop-up menu.
+  4. If the Enabled status of the rule is **No** , open the context menu for it and select **Enable Rule** from the pop-up menu.