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how to see if wifi is blocking access to a specific website?

asked 2020-02-03 17:57:38 +0000

yourdonefor gravatar image

I'm sorry that I am a wireshark noob here. There are some websites in which my request times out when I try to access them and if I turn on my vpn, that same website works just fine. What can I look for in wireshark to see if its the router/wifi refusing connection to the website or something else that's causing it? (I am not here to learn how to circumvent restrictions, I just want to know what to look for in wireshark to confirm my suspicions?

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Make a capture to a web site that works. This should/may show the TCP handshake, TLS negotiation (if HTTPS), data transfer and eventually closing the TCP connection. With this as a baseline, repeat for one of the sites that doesn't work. How far does it get in the process?

Chuckc gravatar imageChuckc ( 2020-02-03 18:48:18 +0000 )edit

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answered 2020-02-04 07:24:53 +0000

Jaap gravatar image

If you're lucky, on your request you get an ICMP destination unreachable message with code 13: Communication administratively prohibited (administrative filtering prevents packet from being forwarded). But the request might also simply be black holed, hence the timeout.

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Asked: 2020-02-03 17:57:38 +0000

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Last updated: Feb 04