In message <Pine.GSO.4.10.9904061107330.16718-100000@tardis-a2.ee.ethz.ch>  Lukas Ruf wrote:

[...]

> 
> My Questions:
> *************
> Can you give me the solution to:
> 	- why can I do A <-> C and B <-> C but not A <-> B (via C) ??

    Because C doesn't forward the packets

> 	- what's the reason that C doest not forward all packets with 
> 	  destination other destination than C itself ?

    Because forwarding is turned off  (either in your kernel is compiled
    without the GATEWAY option, or forwarding is turned of during 
    startup).
    do a 
    sysctl net.inet.ip.forwarding
    I guess it will respond:
    net.inet.ip.forwarding = 0

> 	- what's the solution to this problem, do you give it to me if
> 	  possible ?

    do a 
    sysctl -w  net.inet.ip.forwarding=1

    You have to this every time you reboot (this can go into /etc/netstart)
    unless you compile your kernel with the GATEWAY option set.

If this is not in the FAQ it should be there .....

> 
> Kind Regards,
> 
> Lukas
> 

Stefan

--
Stefan Grefen                                Tandem Computers Europe Inc.
grefen@hprc.tandem.com                       High Performance Research Center
 --- Hacking's just another word for nothing left to kludge. ---