Hi Saad,
Are you migrating from VMware, Hyper-V or physical servers?
For discovery the appliance use:
- TCP/443 for vCenter
- WinRM port 5985 for Hyper-V
- WinRM port 5985 (Windows) and TCP/22 (Linux) for physical servers
For sending data the appliance use TCP/443.
You can find some more details on the links below:
https://learn.microsoft.com/en-us/azure/migrate/migrate-appliance#discovery-and-collection-process
Cheers,
Saulo