In some email I received from Nicolai Petri, sie wrote:
> On Fri, 18 Jun 1999, Brian Fundakowski Feldman wrote:
> > On Fri, 18 Jun 1999, Ruslan Ermilov wrote:
> > 
> > > Let's join our efforts in this area!
> > > IPFW code is very ugly...
> > 
> >    Which is basically due to it being hacked on for years without a cleanup.
> > Now's the time (between major versions) to do this, I think. How's this:
> > let's organize a small group to bounce ideas off eachother, first of all
> > (I'm forwarding this to hackers to perhaps elicit a response of more 
> > people.)
> > We should get ideas on what people think is wrong with the current
> > implementation, what new features should be added, and where we should
> > rearchitect.
> 
> What about support for protocol verification ?? (Example : Blocking of
> malformed ftp commands.) 

Surely you jest...

> Wich layer would it be logically to implement this in ?

5 and above.

> Is a userland proxy the only way ?

With a 100% reliability, yes.



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