Sharing internet using iptables

I am explaining how two share internet from one connection to other, here i am using one connection on my ethernet port to share with the wireless add hoc network.

settings at ethernet port (eth0)
IP : 192.168.1.9
MASK : 255.255.255.0
Gateway : 192.168.1.1

my laptop is configured to get internet from modem connected through LAN port and IP address of Modem is 192.168.1.1

settings for my Wifi Adaptor(wan0)
IP : 192.168.0.1
MASK : 255.255.255.0
Gateway : 192.168.1.1

now after this i have created an add hoc network so the systems connecting to my WiFi add hoc network must have following configuration
IP : 192.168.0.[2-254]
MASK : 255.255.255.0
Gateway : 192.168.0.1
DNS  : 192.168.0.1

Now configuration part is done, next we need to setup sharing, first of all we will enable ip forwarding by issuing following command as root user
sysctl -w net.ipv4.ip_forward=1

To enable it in system startup, edit the file /etc/sysctl.conf and set

net.ipv4.ip_forward = 1

now for sharing do the following commands. this should again be done as root user

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
service iptables save

I use open DNS for better resolution, you can also tryout same
208.67.222.222
208.67.220.220

Add graphics to fedora 10 boot screen

In order to see the graphical boot, you must enable a mode setting for your video. Most users will find vesafb allows most standard VGA resolutions. Some (older) examples are in Linux Kernel Documentation / fb / vesafb.txt. You must have a proper Kernel mode number. For example I selected: 0x318 for 1024x768x16M resolution on a desktop CRT monitor.

As 'root', edit /boot/grub/grub.conf, and add 'vga=0x318' to the end of the kernel line. For example:

title Fedora (2.6.27.5-117.fc10.i686)
root (hd0,9)
kernel /boot/vmlinuz-2.6.27.5-117.fc10.i686 ro root=UUID=bb061789-157b-4cb2-85c8-633026e8df1e rhgb quiet vga=0x318
initrd /boot/initrd-2.6.27.5-117.fc10.i686.img


The graphic modes are NOT in the list which you get if you boot with vga=ask and hit return. The mode you wish to use is derived from the VESA mode number. Here are those VESA mode numbers:

| 640x480 800x600 1024x768 1280x1024
----+-------------------------------------
256 | 0x101 0x103 0x105 0x107
32k | 0x110 0x113 0x116 0x119
64k | 0x111 0x114 0x117 0x11A
16M | 0x112 0x115 0x118 0x11B

The video mode number of the Linux kernel is the VESA mode number plus 0x200. Linux_kernel_mode_number = VESA_mode_number + 0x200

So the table for the Kernel mode numbers are:

| 640x480 800x600 1024x768 1280x1024
----+-------------------------------------
256 | 0x301 0x303 0x305 0x307
32k | 0x310 0x313 0x316 0x319
64k | 0x311 0x314 0x317 0x31A
16M | 0x312 0x315 0x318 0x31B