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What Reaction to Packet Loss Reveals About VPN
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- 1 Intro
- 2 OpenVPN, each 5th packet
- 3 Once upon a time...
- 4 Behind the scenes...
- 5 Packet timings: routers
- 6 PortBunny: kernels
- 7 Nagle's algorithm vs delayed ACK
- 8 Just your normal VPN...
- 9 Experiment
- 10 100-packet timings for OpenVPN UDP, each 5th packet dropped
- 11 IPSec fingerprints
- 12 Netcat is sneaky
- 13 What about chaining mode?
- 14 Slow data (across US)
- 15 It's all about queues
- 16 What is going on?
- 17 Profiling attempt
- 18 Non-intuitive take-away?
- 19 Future work
