Re: Linux 2.2.16 through 2.2.18preX TCP hang bug triggered by rsync

[James Sutherland]

On Thu, 25 Jan 2001, Matthias Andree wrote:

> On Wed, 24 Jan 2001, Andi Kleen wrote:
> 
> > It's mostly for security to make it more difficult to nuke connections
> > without knowing the sequence number.
> > 
> > Remember RFC is from a very different internet with much less DoS attacks.
> 
> If you're deliberately breaking compatibility by violating the specs,
> you're making your own DoS if your machines can't chat to each other. If
> you insist on breaking the RFC, make a sysctl for this behaviour that
> defaults to "off".

This isn't a violation - the section quoted does not REQUIRE the
behaviour, it only RECOMMENDS it as being a good idea. Since implementing
it apparently makes DoS attacks easier, NOT implementing it is now a
better idea...

James.