Linux Firewall in floppy disk

Linux under the Firewall (firewall) from the birth to the present, the firewall has experienced four stages of development: the first stage: the firewall based on the router, the second stage of the user Firewall tool sets; Phase III: A firewall built on a common operating system; Phase IV: A firewall with a secure operating system. At present, most of the world's firewall vendors are provided with a secure operating system hardware and software combination of firewalls, such as the famous Neteye, NetScreen, Talentit and so on. There are also a lot of firewall software on Linux operating systems, some are commercial versions of firewalls, and some are completely free and open source code firewalls. Most Linux tutorials mention how to use IPChains to build firewalls on Linux platforms.

Setting up and managing firewalls in the Linux operating system is an important task for network system administrators. In general, configuring firewalls is really a very high-tech job. Whether it's a commercial version of a firewall or a completely free firewall, you need to configure the hardware and software in the Linux platform.

Is there a handy Linux firewall that you can carry with you? The answer is yes, and now I'd like to introduce a Linux firewall that can be installed in a normal floppy disk. The Linux firewall named FLOPPYFW can be stored in a normal floppy disk and run independently in RAM memory. It enables you to start your computer, use IPChains to filter out unwanted IP packets, and use it to configure IP camouflage (IP masquerade), the monitoring port, through which you can use the host to remotely control computers in other networks. The FLOPPYFW function is very powerful, but it requires a very low hardware environment, in addition to a floppy disk, as long as 8MB of memory is enough.

The most hardware devices required by FLOPPYFW are as follows:

Minimum 8MB memory

3.5 "Floppy Drive

Display Card

Keyboard

Display

Some Linux system load two network card, can make floppyfw normal work, this requires each network card IRQ and memory address are correct. Configuring a dual NIC in a Linux system is a trusted system administrator.

The FLOPPYFW supports the following network adapters.

3Com 3c509

NE2000 compatibles

Tulip-based

Intel EtherExpress PCI

About Software:

It is very easy to make a floppy disk that can be guided by FLOPPYFW. But you have to go to http://www.zelow.no/floppyfw/download/first to download FLOPPYFW to your computer's hard disk. FLOPPYFW the latest version should be 1.0.5 or higher, FLOPPYFW is a mirrored file that can be used

# dd if=floppyfw-1.0.5.img of=/dev/fd0 bs=72k This command to extract the mirrored file and write it on a prepared floppy disk.

About settings:

It should be noted that the normal floppy disk format is a DOS (FAT) format. In order to start the Linux system smoothly, we need to make some changes on this floppy disk. It is recommended that you use a different computer to modify this floppy disk, preferably if you modify it using the Mtools tool in your Linux system.