I read these lines somewhere -
There are more then 400 Computers in your Office. You are appointed as a System Administrator. But you don't have Router. So, you are going to use your One Linux Server as a Router. How will you enable IP packets forward?
Answer and Explanation:
1. /proc is the virtual filesystem, we use /proc to modify the kernel value at running time. So For Current Session:
echo "1" >/proc/sys/net/ipv4/ip_forward
2. /etc/sysctl.conf when System Reboot on next time, /etc/rc.d/rc.sysinit scripts reads the file /etc/sysctl.conf.
So if you want to permanently set the IP forwarding enable, You should set:
Here 0 means disable, 1 means enable
Can anyone help me in understanding why we need router ?