Date: Tue, 28 May 2002 17:14:31 -0700 From: "Albuquerque, Marcelo M" <marcelo.m.albuquerque@boeing.com> To: "'freebsd-questions@FreeBSD.ORG'" <freebsd-questions@FreeBSD.ORG> Subject: configuring dummynet/ipfw in bridging mode Message-ID: <F10E013C394AD411A2F10008C75DF4823D4383@xch-knt-01.nw.nos.boeing.com>
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I am using FreeBSD 4.5 and have 3 NIC cards installed. Traffic is being
bridged between the three interfaces. I am trying to configure ipfw such
that I can have different impairments (delay, losses, etc..) between each
possible pair of NIC cards. It seems to be a simple setup but I'm having
problems getting it to work. The following is my testbed setup:
___________________
| |
192.168.1.1 ------------ | FreeBSD 4.5 Bridge | ------------
192.168.1.2
|___________________|
|
|
192.168.1.3
The following command works fine: ' ipfw add 100 deny ip from any to any
in recv fxp0 '
The result is that when I ping from or to the ip address connected to fxp0
it will timeout.
I expected the same to happen with the following command: ' ipfw add 100
deny ip from any to any out xmit fxp0 '
The result is that pings from or to the ip address connected to fxp0 are
successful. The same happens if I replace 'xmit' with 'recv'
My ultimate goal is to use the following command: ' ipfw add 100 deny ip
from any to any out recv fxp0 xmit fxp0 '
This will also fail like in the previous case, even though this command is
shown as an example in the ipfw(8) documentation. This will allow me to have
a set of impairments for each pair of NICs, in each direction.
The same thing happen if a pipe is created and configured with impairments
such as a 100ms delay.
Can anyone help me figure out what is wrong with my setup/configuration.
Thanks.
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