Use DNS resolving instead of the IP reported by the host agent

Description

Starting with Parallels RAS version 21.1, the default behavior is to use the IP reported by the host agent to connect, rather than the Connection Broker resolving the host IP.

This prevents connection issues when a host's IP address cannot be resolved.

Resolution

To explicitly use the DNS resolving, follow these steps to change the value of UseRASAgentIP in the Windows Registry of all Connection Broker servers across the Farm.

1. Open Registry Editor

2. Navigate to : HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Parallels\2XController

3. Locate the UseRASAgentIP DWORD value

4. Change the value :

- 1 = Use Agent-reported IP

- 0 = Use DNS resolution

In this case we need to use value = 0

5. Apply the change on all Connection Brokers

6. Restart the Parallels RAS Connection Broker service (or reboot the Connection Broker) for the change to take effect.

Expected Result

RAS will use DNS resolution to determine the host address when establishing connections to  published resources.