Andi Kleen wrote:
We've recently had a long discussion about the CVE-2005-0356 time stamp
denial-of-service
attack. It turned out that Linux is only vunerable to this problem when
tcp_tw_recycle
is enabled (which it is not by default).
In general these two options are not really usable in today's internet because
they
make the (often false) assumption that a single IP address has a single TCP
time stamp /
PAWS clock. This assumption breaks both NAT/masquerading and also opens Linux
to denial
of service attacks (see the CVE description)
Due to these numerous problems I propose to remove this code for 2.6.26
We use these features to enable creating very high numbers of short-lived
TCP connections, primarily used as a test tool for other network
devices.
Perhaps just document the adverse affects and/or have it print out a warning
on the console whenever the feature is enabled?
Thanks,
Ben
--
Ben Greear <[EMAIL PROTECTED]>
Candela Technologies Inc http://www.candelatech.com
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