possibility to multiply packets?

possibility to multiply packets?

[Marcus Graf]

Hello everyone,

a friend of mine is working for some weeks in a foreign country. Now we
have the problem that at the company there he's got a lot of bandwidth
but we have a very bad connection. At some times we have a packet loss
over 20%. It looks like the packets are dropped randomly at an
overloaded or misconfigured router somwhere in between.

As a quick temporary solution we've thought of sending every packet
twice. Is there any possibility to intentionally (mis)configure
netfilter to duplicate packets?

Thanks
Marcus

-- 
Hail Eris! Hail Discordia!

RE: possibility to multiply packets?

[Kelvin Proctor]

> Is there any possibility to intentionally (mis)configure
> netfilter to duplicate packets?

Marcus,

I needed to do something a bit crazy like this recently. I was wanting
to get packets to be re-transmitted to multiple interfaces.

I have found the ROUTE target module to be really great for this
purpose.  If you use the --tee option a duplicate of the packet is
create and routed in some manner that you select.

This would certainly be an option.

I was using a Fedora Code 5 box which unfortunately does not have the
ROUTE module patched into the kernel, but in this case patch-o-matic is
your friend.

For more details see:

http://www.netfilter.org/projects/patch-o-matic/pom-extra.html#pom-extra
-ROUTE

for more information.

Hope this helps,

Kelvin