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A comment on Critical: Vulnerabilities in Windows TCP/IP Could Allow Remote Code Execution.

Re:Critical: Vulnerabilities in Windows TCP/IP Could Allow R... by NathanKP on Thursday September 10, 2009 @11:51AM (#815471)
I wonder if this particular vulnerability can be stopped by a firewall.
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Re:Critical: Vulnerabilities in Windows TCP/IP Could Allow R... by tptacek on Thursday September 10, 2009 @12:28PM (#815556)
If it's IP timestamps, then certainly yes --- your firewall should be blocking this by default.
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Re:Critical: Vulnerabilities in Windows TCP/IP Could Allow R... by hedgehog on Thursday September 10, 2009 @12:11PM (#815520)
PF can do it:

scrub in all reassemble tcp

http://www.openbsd.org/faq/pf/scrub.html

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