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IP Masquerade is a networking function in Linux similar to the one-to-many (1:Many) NAT (Network Address Translation) servers found in many commercial firewalls and network routers. For example, if a Linux host is connected to the Internet via PPP, Ethernet, etc., the IP Masquerade feature allows other "internal" computers connected to this Linux box (via PPP, Ethernet, etc.) to also reach the Internet as well. Linux IP Masquerading allows for this functionality even though these internal machines don't have an officially assigned IP address . MASQ allows a set of machines to invisibly access the Internet via the MASQ gateway. To other machines on the Internet, the outgoing traffic will appear to be from the IP MASQ Linux server itself. In addition to the added functionality, IP Masquerade provides the foundation to create a HEAVILY secured networking environment. With a well built firewall, breaking the security of a well configured masquerading sys...

this is tutorial to install nvidia display driver on enterprise linux *all of the command must be executed as root user  1. check the nvidia product type lspci -nn | grep VGA here you will have the infomation what proprietary driver you should download from www.nvidia.com site. 2. install the Development Tools group packages, kernel headers, kernel devel, and dkms yum groupinstall "Development Tools" yum install dkms kerne-devel kernel-headers 3. disable the nouveau driver using your text editor vim /etc/modprobe.d/blacklist.conf #add this line blacklist nouveau 4. go to /boot directory make a copy of initramfs file cd /boot mv initramfs-$(uname -r).img initramfs-$(uname -r).img.bak 5. proceed to create new initramfs file dracut -v initramfs-$(uname -r).img $(uname -r) 6. change inittab to start the system with no X11 vim /etc/inittab change runlevel to 3 7. restart the system reboot 8. login in command line as root, run the script to install t...

in our tour of duty, we are facing another case where the ethernet device on motherboard didn't recognize by linux kernel. here are the specification : motherboard  : GIGABYTE G41MT-S2PT linux operating system :   Scientific Linux 6.0 another enterprise-based linux (centos, oracle linux) will works (i hope). we have try with fedora 14 , but it didn't recognize the device and the driver is not available yet. fortunate we have found the driver in binary (RPM package). first download the package file from the following links : i386 driver : kmod-atl1e-1.0.1.14-1.el6.elrepo.i686.rpm x86_64 driver : kmod-atl1e-1.0.1.14-1.el6.elrepo.x86_64.rpm step 1 install the package by typing  (as root) rpm -ivh kmod-atl1e... .rpm step 2 change directory to /etc/sysconfig/, please check whether there is a file called network, if there isn't create new file with your favourite text editor. cd /etc/sysconfig/ vim network the content of network file : NETWORKING=...