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Is it possible to spoof the IP once a TCP handshake was performed successfully? No. A TCP session is defined by four items: Source IP address Source IP port Destination IP address Destination port This comes from RFC 793: To provide for unique addresses within each TCP, we concatenate an internet address identifying the TCP with a port ...


5

So, how can I (the user) feed (spoof) the VPN IP address (which I have in a text file) to any JS that might run so that it all looks the same to the web server? The detection of local IP addresses you refer to depends on WebRTC. There is no way to spoof the addresses returned during the WebRTC discovery without changing either the browser code or ...


3

As explained by the answer of gowenfawr you can not change the IP of a TCP session. However there are some options to have a TCP connection while spoofing the source IP. All that IP-spoofing does is change the Source IP address of the packet you send. This is done on the routing (IP) layer of the network stack. The server will threat this spoofed packet as ...


1

It's hard to say what your definition of "OK" is, but generally, I'd say, no, you're not ok with your current setup. I'll cover your points individually. The data being transferred is strongly encrypted. This is good. In other words, you could put the file with a download link up on a public website. If you trust the encryption, then your data is ...


1

I don't see a risk for most of the cases. The JavaScript will return the address of the machine, which is useless if it is communicating behind something like proxy, router, Wifi AP or NAT.



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