You must configure the MediaAgents to receive communications from the client through the Commvault network gateway.
During the network settings configuration, you will perform the following configurations:
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Set incoming connections from the network gateway as Blocked.

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Set an outgoing route from the MediaAgent to the client.
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Remote Group/Client: client or client group
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Route type: Via network gateway
 
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Set an outgoing route from the MediaAgent to the Commvault network gateway.
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Remote Group/Client: Commvault network gateway
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Route type: Direct
 
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Before You Begin
You must have configured the CommServe computer to receive communications from the client. For instructions, see Configuring the CommServe Computer.
Procedure
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From the CommCell Browser, right-click the MediaAgent computer, and then click Properties > Network.
On the Network Route Configuration tab, select the Configure Network Route Settings check box, and on the Incoming Connections tab, click Add.
The Connections to dialog box appears.
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In the From list, select the Commvault network gateway computer. From the State list, select BLOCKED, and then click OK.
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Click the Outgoing Routes tab, and then click Add to create the outgoing connection route from the MediaAgent to the client through the Commvault network gateway.
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Select the client from the Remote Group/Client list, and then select a Route Type of Via Network Gateway.
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Select the Commvault network gateway in Remote Network Gateway, and then click OK.
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Click Add again to create another route, this time the one from the MediaAgent to the Commvault network gateway.
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Select the Commvault network gateway from the Remote Group/Client list. The Direct route type and Regular tunnel connection protocol are selected by default.
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Select the Force all data (along with control) traffic into the tunnel option, and then click OK to add the route and close the Route settings dialog box.
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Confirm that the Outgoing Routes tab shows the following two routes:
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The route from MediaAgent to the network gateway
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The route from MediaAgent to the client through the network gateway
 
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Click OK.
Your MediaAgent is now configured to receive communication from the client through the Commvault network gateway.
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In the CommCell Browser, right-click the MediaAgent computer and then click All Tasks > Push Network Configuration.
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Read the warning, click Continue, and then click OK.
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Check the Event Viewer window to confirm that your network configuration was pushed successfully.