Eric Van Buggenhaut <[EMAIL PROTECTED]> writes: > On Wed, Sep 05, 2001 at 02:37:28PM +0200, Florian Weimer wrote: > > Russell Coker <[EMAIL PROTECTED]> 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 [EMAIL PROTECTED] University of Stuttgart http://cert.uni-stuttgart.de/ RUS-CERT +49-711-685-5973/fax +49-711-685-5898