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Re: TOS copying considered harmful



> First, copying TOS is a security leak:  it permits an eavesdropper to

Not more so than keeping the same packet size (rounded up to a multiple
of 8).  To the extent that someone wants to rely on the TOS field, they  
should be able to do so.  ANyone running a tunnel paranoid enough to
be worried about potential TA based on the TOS field will also know enough
to pad packets and blot out the TOS field.

I say leave it alone.

/ji

--
 /\  ASCII ribbon  |  John Ioannidis * Secure Systems Research Department
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