Tag Archives: Network address translation

Firewalls 101: Hardware, Software & Web Application Firewalls

 

SVG version of Image:DMZ network diagram 2 fir...
DMZ network diagram 2 firewalls

Firewalls: We all know they are vital for Internet security, but what are their basic purposes and flavors? This series serves as a basic beginner’s guide to firewalls of the three major types: hardware, software, and web application (WAFs).

For this three-part series, we will look at information from several different sources. The primary ones will be “Hardware Firewall vs. Software Firewall,” from the Michigan Cyber Initiative; “Best Practices: Use of Web Application Firewalls,” from the Open Web Application Security Project (OWASP); and “What You Should

Know About Firewalls,” by Michael Desmond for PCWorld. This first part will focus on firewalls generally. The second part will target the differences between hardware and software firewalls; and web application firewalls will be explored in-depth in the third installment.
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An Introduction to Different IP Classes

With the explosive launch of the world’s mobile networks we were facing the prospect of imminent IP address exhaustion. Yes there were only so many IP addresses created and allocated to hosts, and Internet service providers. The long term solution to  address IP address depletion became a serious concern. What was needed was an IP address architecture that could span not just billions of connected devices but hundreds of billions of devices or more. Out of this effort came version 6 of the Internet Protocol, or IPv6.

A Primer on IPv4, IPv6 and Transition

A Primer on IPv4, IPv6 and Transition | How to Grow Your Business Online | Scoop.it

From www.circleid.com – 3 weeks ago

There is something badly broken in today’s Internet. At first blush that may sound like a contradiction in terms. After all, the Internet is a modern day technical marvel.

Juliana Payson‘s insight:

I need a few days to absorb the information in this article. It’s extensive, not so much a primer, but a very in-depth article about the way the internet stands to date in terms of size and transition to the new IPv6.

How and Why All Devices in Your Home Share One IP Address


Tech Go Simple: How and Why All Devices in Your Home Share One IP Address | How to Grow Your Business Online | Scoop.it

From Tech go simple – Today
If you’re like most people, your Internet service provider hands you a single Internet Protocol address and your router shares it amongst all the connected devices in your home. This actually violates the end-to-end principle, which the Internet was designed around. However, there are only so many IP addresses to go around – we’re running out.

Juliana Payson‘s insight:

There are less than 4.2 billion available IPv4 IP addresses. In other words, there are more people owning connected devices on the planet than there are unique, public IP addresses for the devices, let alone the fact that many people will own more than one device. The Internet is running out of IPv4 addresses, even though we’re rationing them. The only way we can have so many devices connected to the internet is to do with something called NAT.

In the following article, using a bit of technical ingenuity a sysadmin demonstrates how he can use his android phone as a connection to the internet for several devices routed through his Linux laptop.

Setting up NAT and MASQUERADE for sharing USB Tether connection over LAN


Setting up NAT and MASQUERADE for sharing USB Tether connection over LAN | How to Grow Your Business Online | Scoop.it

From tuxdna.wordpress.com – Yesterday

I the only source of Internet connection I have currently is my phone. I wanted to share this network with other systems, via a LAN/wireless router. So here is a basic setup: Android Phone with USB…

Juliana Payson‘s insight:

The Laptop, becomes a default gateway for rest of the machines connected to the router – his phone. Given the recent Syrian internet cut off ingenius skills like these may come in handy for those with difficult internet connections. Let me know if you’ve also tried using your phone as a hotspot for the internet. – Juliana