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Unit 5: Connecting to Internet

The IANA has allocated IP addresses in the range of 192.168.0.0 to 192.168.255.255 for private notes
networks.
Helpful tools
Network Calculators: Subnet mask calculator, node calculator, mask inverter, ...
IP subnet calculator

5.2 connecting to Lan

For this step, work is needed both on the GNU/Linux host and on the iPAQ.
usB networking on the gnu/Linux Host

You need to have a supported USB hub in your PC, and have the kernel module installed for
it. You should also obtain the kernel module named usbnet, which is bundled in Linux kernel
since version 2.4.10, but working version is only bundled since 2.4.13. However, I found the
experimental module in my stock Red Hat 7.2 distribution (kernel 2.4.7), and it seems not to
behave too badly...

It is normally found as /lib/modules/kernel_version/kernel/drivers/usb.
If you cannot find the module, but have a supported kernel, you need to enable the CONFIG_
USB_USBNET option in the kernel config (from the main config menu, go into “USB Support”,
you may need the “Code maturity level option” set to “EXPERIMENTAL”), and compile it with
a command line like:

bash$ gcc -O2 -I /usr/src/linux/include -DMODULE -D__KERNEL__ -c usbnet.c

Note You must have gcc and correct kernel headers installed in order for this to
work.
Otherwise, consider upgrading your kernel. As an alternative, you can continue to download all
the required files using the serial method, it will only be slower.
Once the module is compiled, copy usbnet.o into the module directories and update the module
dependencies with:

bash# cp build_dir/usbnet.o /lib/modules/kernel_version/kernel/drivers/usb
bash# depmod -a
You can then insert it with:

bash# modprobe usbnet

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