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the simplest solution ist to get two cheap wifi routers. the first has to be configured in client mode - that means it connects to the community wifi as if it was a computer/smartphone/whatever. If it is configured correctly you can plug your computer in via a ethernet and you will be assigned an ip address and redirected to the captive portal as if you ...
You can use a packet sniffer (like Wireshark), or an HTTP proxy (like Fiddler on Windows.) Either will show you the requests, answers, and things like cookies and other headers.
Chrome and Internet Explorer have a developer mode built into them. You access this by hitting F12.In the developer options you can select network and see client to server communication. For more information on developer mode for these two browsers, you can check out the links below. I find that if I just want to monitor communication or inspect elements, ...
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