Arch Linux

DasFox

Member

Registered: 2010-11-24

Posts: 107

Is There A Way From Preventing Clock Skew From Showing Online?

I've read some interesting information on Clock Skew and how this can be fingerprinted and exploited back to you, I believe through the TCP Stack...

I'd like to know if there's a way to just prevent Clock Skew from appearing when you're online and preventing this?

I ran across this;

http://www.wilderssecurity.com/showthread.php?t=131075

I wonder if this has to do with the TCP timestamps is all and by disabling this, you're good?

In  /etc/sysctl.conf  I have this;

net.ipv4.tcp_timestamps = 0

THANKS

Last edited by DasFox (2011-12-18 22:34:44)

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Leonid.I

Member

From: Aethyr

Registered: 2009-03-22

Posts: 999

Re: Is There A Way From Preventing Clock Skew From Showing Online?

Yes, disabling tcp_timestamps should be enough, according to man 7 tcp. But this will come at some performance penalty.

I guess, by "physical identity" those people meant MAC? I wonder if plain spoofing it via ifconfig/rc.local would work.

Finally, this belongs to general discussions...

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