[operator-nexus] Add iDRAC configuration and firewall rules

Author: Satyanarayanatalluri

articles/operator-nexus/howto-platform-prerequisites.md

@@ -403,8 +403,8 @@ Before deploying AODS software, it’s best for the Operator to set the iDRAC IP
 
    - Assign IPs based on each server’s position within the rack.
    - Use the fourth /24 block from the /19 subnet allocated for fabric.
-   - Start assigning IPs from the bottom server upwards in each rack, beginning with .11.
-   - Continue to assign IPs in sequence to the first server at the bottom of the subsequent rack.
+   - Start assigning IPs from the bottom server upwards in each rack, beginning with 0.11.
+   - Continue to assign IPs in sequence to the first server at the bottom of the subsequent next rack.
 
 ### Example
 
@@ -473,17 +473,18 @@ To establish firewall rules between Azure and the undercloud, the Operator must
 
 | S.No | Source                 | Destination           | Port (TCP/UDP)  | Bidirectional  | Rule Purpose                                             |
 |------|------------------------|-----------------------|-----------------|----------------|----------------------------------------------------------|
-| 1    | Azure virtual Network  | Undercloud            | 22 TCP          | No             | For SSH to undercloud servers from CM subnet             |
-| 2    | Azure virtual Network  | Undercloud            | 443 TCP         | No             | For accessing undercloud nodes iDRAC                     |
+| 1    | Azure virtual Network  | Undercloud            | 22 TCP          | No              | For SSH to undercloud servers from the CM subnet.        |
+| 2    | Azure virtual Network  | Undercloud            | 443 TCP         | No             | To access undercloud nodes iDRAC                         |
 | 3    | Azure virtual Network  | Undercloud            | 5900 TCP        | No             | Gnmi                                                     |
 | 4    | Azure virtual Network  | Undercloud            | 6030 TCP        | No             | Gnmi Certs                                               |
-| 5    | Azure virtual Network  | Undercloud            | 6443 TCP        | No             | For accessing undercloud K8S cluster                     |
+| 5    | Azure virtual Network  | Undercloud            | 6443 TCP        | No             | To access undercloud K8S cluster                         |
 | 6    | Undercloud             | Azure virtual Network | 8080 TCP        | Yes            | For mounting ISO image into iDRAC and NNF runtime upgrade|
 | 7    | Undercloud             | Azure virtual Network | 3128 TCP        | No             | Proxy to connect to public Azure endpoints               |
 | 8    | Undercloud             | Azure virtual Network | 53 TCP and UDP  | No             | DNS                                                      |
 | 9    | Undercloud             | Azure virtual Network | 123 UDP         | No             | NTP                                                      |
-| 10   | Undercloud             | Azure virtual Network | 8888 TCP        | No             | For connecting to Cluster Manager webservice             |
-| 11   | Undercloud             | Azure virtual Network | 514 TCP and UDP | No             | For accessing undercloud logs from Cluster Manager       |
+| 10   | Undercloud             | Azure virtual Network | 8888 TCP        | No             | Connecting to Cluster Manager webservice                 |
+| 11   | Undercloud             | Azure virtual Network | 514 TCP and UDP | No             | To access undercloud logs from the Cluster Manager       |
+
 
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