Using Fiddler to capture traffic from smart tv

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gatzkerob

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Feb 2, 2014
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- I've set up Fiddler to capture HTTPS CONNECTs and decrypt HTTPS traffic using a certificate. Also enabled "Allow remote computers to connect" and set up the proxy on both Fiddler and my tv.

- It captures traffic just fine when I run Sony Entertainment Network, but fails for some reason on Netflix.

- When I run Netflix on my tv, all I get in Fiddler is "Tunnel to ssm3.internet.sony.tv:443", followed by a connection error on my tv.

- I also run Wireshark while connecting to Netflix and Wireshark captures EVERYTHING.

- How can I make Fiddler run as good as Wireshark?

- Windows 7 - Motherboard has dual Ethernet ports and sits between the router and the tv.
 
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bill001g

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Aug 9, 2012
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Wireshark is completely passive you could actually capture and analyses with a different machines. To decode the HTTPS you of course need to have access to export the certificates. Fiddler is a man in the middle attack. It is uses a proxy along with the ability to compromise the security of the certificates used to encrypt the data. The machine fiddler is running on has been configured to ignore the certificate warning. This does not mean other devices in the communication path can not detect this and refuse to work. Then again it could be as simple as netflix has a issue running though certain proxy servers. Many video streaming services do not run though proxy
 
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gatzkerob

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Feb 2, 2014
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I've also tried disabling the proxy on the TV but then Fiddler sees nothing at all from the TV, while Wireshark sees everything. I have Wireshark set up to capture on the Ethernet port connected to the TV - is there a way to specify which Ethernet port / device to capture from using Fiddler? Fiddler can see all other traffic from the PC - just not from the TV once the TV's proxy is disabled.
 
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