Changing TOS of forwarded packets?

[Julian Elischer]

On Wed, 4 Feb 2004, Dominik Lupinski wrote:

> On Wed, Feb 04, 2004 at 11:04:52AM +0300, Vladimir B. Grebenschikov wrote:
> > ? ??, 04.02.2004, ? 03:17, Julian Elischer ?????:
> 
> > > here's a suggestion..
> > > I have not done this but it might work:
> > 
> > I have tried such scheme (second, with two divert sockets, tee not
> > necessary). It works, only thing you should care about - packet should
> > not enter to this chain twice or kernel will panic.
> 
>   Thanks, both of you, for the input. Seems like I found the proper way for
>   dealing with ip packets in the stack. (Yes, I also think that tee node was
>   redundant in the second example).

yeah the tee node was  a cut-n-paste error :-)


> 
> > ps:
> >   change action for ipfw2 will be funny enough, like:
> >     ipfw add X change iptos congestion ....
> >     ipfw add Y change src-ip 1.1.1.1 ...
> >   may be it is not bad feature for ipfw2 ?
> 
>   At least it's high time to have such thing natively in FreeBSD...
> 
> -- 
> "...they build you up only to tear you down."
>