two NICs and speed issues

[Chadley Wilson]

On Mon, 2004-07-19 at 16:36, sam at illawarra.org wrote:
> 220.x.x.x   0.0.0.0         255.255.255.255 UH    0      0        0 ppp0
> 192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
> 192.168.0.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1
> 169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 eth1
> 0.0.0.0         220.x.x.x   0.0.0.0         UG    0      0        0 ppp0
> 
> ^i get the same slowdown when i am connected to the internet or not,
> iptables is only activated when i am online, so do not see how this would
> be relevant.
> 
The way I understand this is that if you picture it this way you have a
PC with modem connecting to the internet, that is your server and all
your clients are connecting to it as a gateway to the www. If you have
used (deliberate or by mistake) the server as the gateway all packets on
your network will route through the server, but if the servers gateway
is assigned to the isp then the packets are going to go out to theisp
and back again that will cause an unusual speed reading in the
connections of the clients as you are experiencing.

I could be wrong as I have never been in your situation, but I have
forced clients to pass all packets through a gateway for traffic
monitoring purposes.
Some one with more hands on experience will need to help you here, 
Keep talking to the list.
but send us the routing tables from the clients as well.
-- 
******************************************************************
Chadley Wilson
Soon 2 B RHCE
Linux Rocks
Welcome to my world.
Enjoy the adventures of Linux 
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Linux is easy, lazy people criticise, curse and fail.