Hi,
        Sorry for not making it clear. I believe RFC 2644
        actually suggested that routers MUST default to
        disabling directed broadcast except explicitly
        configured to do so. But I guess one can never
        be too careful. :-)

        yushun.

____________________________________________________________________________
Yu-Shun Wang <[EMAIL PROTECTED]>               Information Sciences Institute
                                           University of Southern California

On Thu, 9 Aug 2001, Warner Losh wrote:

> In message <[EMAIL PROTECTED]> Yu-Shun Wang writes:
> :     I think it's specified in RFC 2644. It might be useful
> :     to site it in the comments of the code.
>
> There were several incidents in the early days of the internet when
> this functionality was in place that caused all kinds of problems.
> Look at the trouble that Jordan got into in 1983 (search the RISKS
> archives) when he send a broadcast to all (which sent the wall to the
> entire internet at the time).  While this wasn't exactly a network
> level broadcast, consider carefully the ramifications.
>
> There are many cases where could be useful turns into a security
> nightmare, so I'd be extremely reluctant to include this patch...
>
> Warner
>


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