fix(rpn): fix rpn-san doc for esxi (#4850)

Author: bene2k1

pages/dedibox-rpn/how-to/use-rpn-san-esxi-v7.mdx

@@ -59,7 +59,8 @@ We suggest considering alternative hypervisors such as Proxmox. You can learn ho
     <Lightbox src="scaleway-vmkernel_nic.webp" width="400" alt="" />
 
     <Message type="note">
-      Make sure to configure Jumboframes (MTU 9000) both for the switch and the NIC.
+      * Make sure to configure Jumboframes (MTU 9000) both for the switch and the NIC.
+      * Make sure the DHCP server IP is set to `[YOUR_RPN_GATEWAY_IP]` and no firewall rules are blocking external DHCP or iSCSI client packets.
     </Message>
 5. Connect to your server using SSH. The SSH credentials are identical to those for the web interface.
 6. Locate the MAC address of the network card connected to the RPN (MTU 9000):
@@ -74,7 +75,7 @@ We suggest considering alternative hypervisors such as Proxmox. You can learn ho
     ```
     vi vmknics.json
     ```
-9. Replace the MAC address of your RPN VMkernel NIC with your [virtual MAC](/dedibox-ip-failover/how-to/create-virtual-mac/).
+9. Replace the MAC address of your RPN VMkernel NIC with your server's private interface MAC address (displayed in your Dedibox console interface).
     <Lightbox src="scaleway-esxi7-vmnic.webp" />
 10. Import the new configuration:
     ```
@@ -94,9 +95,9 @@ We suggest considering alternative hypervisors such as Proxmox. You can learn ho
     <Message type="tip"> 
       You can find the RPN gateway either on your server's overview page in the Dedibox console or by following [this guide](/dedibox-rpn/how-to/find-rpn-gateway/).
     </Message>
-4. Ping the RPN-SAN to check if the RPN connection is working properly:
+4. Ping a RPN-SAN (`san-1.rpn.online.net`, `10.90.254.113`) to check if the RPN connection is working properly:
     ```
-    ping san-1.rpn.online.net
+    ping 10.90.254.113
     ```
 5. Open the file `/etc/rc.local.d/local.sh` in a text editor and add the following lines to it to configure the RPN route automatically during boot:
     ```