In your image above the connection says "Not Secure" this could imply you clicked something a different time saying even though this certificate is bad I'm choosing to trust it, allowing you to proceed to the site. When a browser sees fishy certificates it will normally warn you with something like this. Now you are receiving real google content through the ISP man in the middle proxy. They start a TSL handshake with you from this ip, decrypt your packets send them to google whom they started a TSL handshake with after you connected to the fake site. So you try a TSL handshake with 64.233.185.113. They set up a fake internet in front of your internet. If your ISP were to tamper with this handshake by sitting in the middle of the connection and impersonating both parties then it is possible for them to accomplish what you said above. ![]() Stackoverflow https packet visibility - HTTPS RFC2818 - S-HTTP HTTPS connections are initiated with a handshake where a handshake packet is sent to a destination routed through the internet and a response is sent allowing for identification and creation of means for a secure channel of communication. They have to be able to see at the very least the IP address of where you are sending a packet so it can make it to its destination. ISP is in control of of the content sent to you so I don't understand how it should be too crazy they are able to do this.Īn ISP can examine your traffic. It doesn't matter what server you send your DNS request to if it's on the Internet, your ISP can see and tamper with it.īear in mind, all of the above also applies to a local network attacker (somebody on the same LAN as you, possibly at a business, home, or public WiFi) if they can get a man-in-the-middle position (and it's usually easy). The ISP can do whatever they like there, too. Modify the response, suppress parts of the response, add their own content, redirect you, prevent a redirect, outright impersonate the server.Īlso, DNS requests and responses are (usually) sent unsecured. If the connection is already encrypted (HTTPS), there's less they can do (they can cut the connection, they can probably tell what site you're requesting, they can tell how long your request and response are, they can try to spoof the server and hope you click through the certificate error message), but on an unencrypted connection they can do whatever they want. Remember, your ISP controls everything going between your computer and the Internet. They also stored (either on their side or in a browser cookie on yours) the fact that you'd seen the banner, so future requests to that site got redirected to HTTPS without any content being injected. Your ISP essentially pulled an "SSL Stripping" attack on you they blocked you from getting the redirect, fetched the HTTPS version of the site themselves, slapped their own content on top of the retrieved HTML, and then returned the modified HTML to you in response to your original HTTP request. In this way, the child iframe will reject the promise instead of resolve them.Your screenshot shows an HTTP ("Not Secure") page, not HTTPS. If you want to send an error message to child iframe, you may also add error property to response object. addEventListener ( 'message', handleOnReceiveMessage ) Handling errors ![]() ![]() Child iframe const action = await IframeMessageProxy.
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