Hi @yk.fyi 

Refer SupportAssist User Guide https://dl.dell.com/topicspdf/dell-supportassist-pcs-tablets_release-notes4_en-us.pdf for more details.

Below ports and URLs must be enabled at your firewall

● 5700—to open the SupportAssist user interface

● 9012—to communicate with Dell SupportAssist service

● 8883, 8884, 8885, or 8886—to communicate with Dell support website

● 28283—to pair your Dell PC to any other PC for data migration

● 28100–28700—to migrate your data to your Dell PC from any other PC.

The PC must be able to connect to the following destinations:

● https://saservices.dell.com

● https://apidp.dell.com

● https://fuslite.dell.com

● https://cs-is.dell.com

● https://techdirect.dell.com

● https://api.dell.com

● https://downloads.dell.com

● https://www.dell.com

● https://dl.dell.com

● http://content.dellsupportcenter.com