[Whonix-devel] Testers wanted! New FIN ACK / RST ACK Leak Test

Whonix | Privacy and Anonymity OS newblogpost at whonix.org
Fri Apr 11 17:20:57 CEST 2014

Mike Perry recently discovered a leak bug in custom transparent proxies (not related to Whonix!) and published his findings on the tor-talk mailing list:

This leak test has been adapted for Whonix and documented here:

Fortunately, I wasn't able to reproduce this leak using Whonix. Probably because the Linux version Whonix is using isn't affected by this bug and/or because Whonix's Firewall uses iptables default policy drop for input-, output-, fowardchain and only allows the Tor user to establish external connections. However, other users using different host operating systems and setups than I should repeat the test.

Please feel encouraged,
- to comprehend the original thread on the tor-talk mailing list
- verify yourself that this leak test doesn't find a leak and share your results
- check if upstream (Linux kernel / iptables) consider this a bug and if it has already been reported (this is not clear yet)

This post has been automatically cross-posted by whonix.org/blog To see the original (including links), go to https://www.whonix.org/blog/testers-wanted-new-fin-ack-rst-ack-leak-test

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