Good day,
I am attempting to replicate a setup I have between a router and an Ubuntu
PC, and have
the same setup working on my MacBook (10.6, Snow Leopard).
First, I have a router that has a USB port. When I plug it into my Ubuntu
PC, it creates an RNDIS connection, allowing me to connect to
the router over
the USB cable via an IP connection. When I plug it into my computer via USB, it gets assigned an IP address of 172.16.84.1, and a new adapter appears when I type ifconfig. I can then SSH into
the device via ssh
[email protected].
When I log in to
the device, I flush
the routes, then create
the default route:
admin@localhost> route -f
admin@localhost> route add default 172.16.84.2
Now, in my Ubuntu machine, I use iptables to enable IP masquerading:
root@Valhalla> sudo iptables -t nat -A POSTROUTING -s 172.16.84.2 -j MASQUERADE
Once this is all done,
the router has internet access over
the USB connection to my
PC.
I am trying to replicate this exact setup on my MacBook now (Snow Leopard), but iptables does not exist for OSX, not even a Macports version exists. I have scoured through other questions on StackOverflow that cover
the usage of
the ipfw command, which apparently works as a drop-in replacement for iptables. However,
the syntax is significantly different, and I'm pretty much lost.
Does anyone with some experience with ipfw have some suggestions on how I could accomplish this and create a NAT connection via IP masquerading like I could with my Ubuntu PC?
Thank you for your assistance.
