🔒 Closed how to identify free sites using queryingweb server

[Habibyo]

Hi am always ask question but no one helps me ger i am again

I cant find free sites of my is.
What method can I use to identify or find my isp free sites?

How can I identify my isp servers if they are free to open by using
http heder
server type like ngnix, apchcoyete bigip etc
by querying the web servers on some ports using nmap or other tools