Update network-requirements.md

Author: alt-key

articles/azure-arc/resource-bridge/network-requirements.md

@@ -22,7 +22,11 @@ Arc resource bridge communicates outbound securely to Azure Arc over TCP port 44
 
 ## SSL proxy configuration
 
-If using a proxy, Arc resource bridge must be configured for proxy so that it can connect to the Azure services.
+> [!IMPORTANT]
+> Arc Resource Bridge supports only direct (explicit) proxies, including unauthenticated proxies, proxies with basic authentication, SSL terminating proxies, and SSL passthrough proxies.
+>
+
+If using a proxy, the Arc Resource Bridge must be configured to use the proxy in order to connect to Azure services.
 
 - To configure the Arc resource bridge with proxy, provide the proxy certificate file path during creation of the configuration files.
 
@@ -42,9 +46,6 @@ There are only two certificates that should be relevant when deploying the Arc r
 
 In order to deploy Arc resource bridge, images need to be downloaded to the management machine and then uploaded to the on-premises private cloud gallery. If your proxy server throttles download speed, you may not be able to download the required images (~3.5 GB) within the allotted time (90 min).
 
-> [!NOTE]
-> Transparent proxies are currently not supported by Arc resource bridge. Alternative options are to exclude Arc resource bridge traffic from the proxy and not use a proxy for Arc resource bridge or use one of the supported proxy configurations (SSL or non-SSL).
->
 
 ## Exclusion list for no proxy