5 Jul 2017

                                          Installing a Firewall
1. First, go to the following URL: http://www.damnsmalllinux.org (three l's)
2. Scroll down until you see a link that says "Download"
3. Under "Current Full Mirror List", click any that work. Some may not work at any given time. If one doesn't work, simply hit back on your browser and try another one.
4. At the time of this guide, the following url worked: ftp://ftp.is.co.za/linux/distributions/damnsmall/current/
5. Go to the "current" directory if not already in it.
6. Click on the file called: dsl-4.4.10.iso -- If you cannot find this file, choose the file closet to it. A higher version number is fine. The file will probably be about 50 MB
7. The file should take about 5-10 minutes to download based on your connection.
 
(IF THE ABOVE STEPS WORKED FOR YOU, SKIP THIS MINI-SECTION)
 
(If you had trouble with the above steps, read this mini-section)
(With mirrors, it is often the case that a particular mirror site doesn't work. At the time of this writing, several mirrors worked. I am providing detailed instructions for each mirror.)
(Above I have already provided instructions for the mirror)
ftp://ftp.is.co.za
 
MIRROR: http://gd.tuwien.ac.at/opsys/linux/damnsmall
(Go to this URL, and under "Subdirectories" click on "current") if available, select the file called "current.iso" (provided the file is at least 49 MB in size) If not, then choose the closest file to dsl-4.4.10.iso, a higher version # is fine.
 
MIRROR: http://ftp.belnet.be/packages/damnsmalllinux/
(go to "current" directory, obtain either "current.iso" (if 49 MB or higher) or find file closest to "dsl-4.4.10.iso")
 
MIRROR: http://ftp.heanet.ie/mirrors/damnsmalllinux.org/
(go to "current" directory, obtain either "current.iso" (if 49 MB or higher) or find file closest to "dsl-4.4.10.iso")
 
At this point, you should have the file either "current.iso" or "dsl-4.4.10.iso" (or something similar) fully downloaded and saved into your Downloads directory.
 
Now, go ahead and open up VirtualBox again, most likely by clicking it on the task bar.
 
8. Click "New" at the top left, an icon that resembles a many-pointed round star.
9. "Welcome to the New Virtual Machine Wizard", click "Next"
10. "VM Name and OS Type": Under "Name" type in: Firewall
11. For Operating System, choose "Linux"
12. For "Version", choose: "Other Linux"
13. Click "Next"
14. "Memory", select "32 MB" and click Next
15. "Virtual Hard Disk", Uncheck "Boot Hard Disk" and click "Next"
16. If a Warning dialog appears, click "Continue"
17. Click "Finish"
18. Now you will notice "Firewall, Powered Off" visible in your VirtualBox control panel. Make sure it is highlighted (it should be) and then right click it, and select "Settings".
19. Select "Network" in the menu to the left.
20. Click on the "Adapter 2" tab.
21. Check "Enable Network Adapter" and next to where it says "Attached to", select "Internal Network" from the pulldown menu.
22. Click "Ok" at the bottom.
23. Once again, right click "Firewall, Powered Off" and select "Start"
24. Check "Do not show this message again" and click "Ok". This is just letting you know that the "RIGHT CTRL KEY" on your keyboard is the "control" key for this virtual machine.
25. "Welcome to the First Run Wizard", click "Next"
26. "Select Installation Media", under "Media Source" is a pull down menu. To the immediate right of that pull down menu is an icon with a folder. Click that folder icon.
27. Locate "current.iso" or "dsl-4.4.10.iso" (or the similar file name) that you downloaded. When located, click "Open". It is likely in the "Downloads" directory of your home folder.
28. Click "Next"
29. Click "Finish"
 
Now the virtual machine will start to boot up. Simply wait... (This may take up to 5 minutes.)
 
30. One or more new dialogs may come up saying "VirtualBox Information", just click "Do not show this message again" and click "Ok"
 
After a few minutes, the booting will finish and you will be looking at the desktop for your firewall virtual machine. To the right of the window you will see some stats that look something like this:
 
Up: 0 k/s - Down: 0 k/s
Processes: 19
CPU Usage: 10%
RAM Usage: 16.2MB/28.8MB
 
etc.
 
Congratulations! You now have a firewall running.

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