Re: RFC2385 (MD5 signature in TCP packets) support

David S. Miller (davem@redhat.com)
Fri, 15 Mar 2002 15:16:28 -0800 (PST)


From: David Schwartz <davids@webmaster.com>
Date: Fri, 15 Mar 2002 15:13:59 -0800

There is no problem with MD5 that makes it unsuitable for this
particular application. A SHA signature would enlarge each packet,
further reducing the effective MTU. This would increase the cost of
what was intended to be a simple mechanism to solve a specific
problem (spoofed SYNs/RSTs).

Ignoring valid RST frames breaks TCP.

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