You can override the hostname while configuring a firewall.
Procedure
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From the CommCell Browser, expand Client Computer Groups, right-click the client_group, and then click Properties.
The Client Group Properties dialog box appears.
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Click Network.
The Network Properties dialog box appears.
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On the Network Route Configuration dialog box, select the Configure Network Route Settings check box, and then click Advanced.
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Click OK to acknowledge the warning and continue.
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On the Outgoing Routes tab, click Add.
The Route Settings dialog box appears.
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From the Remote Group/Client list, select a CommServe computer.
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Select Port Forwarding as the Route Type.
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In the Port Forwarder Hostname field, enter the IP address of the NIC that is reachable from the client.
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In the Port Forwarder Tunnel Port field, enter the tunnel port on the CommServe computer.
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Click OK.