Hello Maanvi,
Sorry for the delayed response. The process to change or add a default gateway in your agent's machines greatly depends on the OS each of them are using.
For example, if you are using a Linux machine, you could use the route commands as seen here to define new default routes:
On Windows, you could edit the network settings to enable IPv4, like seen in Microsoft's official documentation:
I apologize for the inconvience this delay may have caused. Do let us know if you need anything else.
Regards,
Gonzalo