Re: sysctl should disable ECN by default
Eric Van Buggenhaut <firstname.lastname@example.org> writes:
> On Wed, Sep 05, 2001 at 02:37:28PM +0200, Florian Weimer wrote:
> > Russell Coker <email@example.com> writes:
> > > Why should the default configuration be changed to account for the
> > > diminishing number of broken routers on the net?
> > >From a technical behavior, throwing away packets with unknown protocol
> > flags is perfectly acceptable in any case and even reasonable in some
> > environments.
> No it's not, you're violating RFC 793.
I was indeed wrong, but not because of RFC 793. IIRC, there isn't
such a required in this standard. But RFC 1812 explicitly requires
routers not to check or otherwise deal with unused IP header fields,
and I think this might be extended by analogy to TCP.
OTOH, anyone is free to do anything with packets passing through his
systems. Internet is not a right. ;-)
Florian Weimer Florian.Weimer@RUS.Uni-Stuttgart.DE
University of Stuttgart http://cert.uni-stuttgart.de/
RUS-CERT +49-711-685-5973/fax +49-711-685-5898