A cheap and cheerful way to reduce Internet surprises

Anyone who has kids in their home worries about how easy it is to access the seamier side of the Internet, even if by accident. Indeed, it is thrust upon us in our email in-boxes daily in the form of misspelled spam with links that only a fool would click.

Another issue altogether is the spam email that is carefully crafted to appear as if it has come from your bank, saying cheerfully “Your statement for May is available online, just click here to access!” … but whoever clicks will inevitably be providing their secrets to some ne’er-do-well in New Zealand who will promptly empty their accounts.

Here is a simple, quick, and free way to avoid phishing attacks as well as casual/accidental exposure to unwanted adult content.

OpenDNS

The service I am referring to is OpenDNS, a free domain name lookup service that you can use in lieu of your Internet Service Provider’s own DNS servers.

When your computer goes to a web site, the name of the web site must be converted to a numeric address, in much the same way that you use a telephone directory to look up a friend’s number.

This lookup service is typically provided by a server owned by your Internet Service Provider. The address to this server is automatically configured when your cable modem connects to the network the first time.

The way OpenDNS works is you change the Domain Name Server (DNS) setting in your router to now point to the OpenDNS servers instead of your ISP servers. By doing this, you have changed the default telephone directory used by your home network.

A Phone book with the Bad Numbers Missing

To take the phone book analogy further, imagine that in your new phone book, all of the phone numbers for shady businesses such as escort services and massage parlors have been replaced with a special number. When you dial that number, a pleasant older woman gives you a gentle scolding for trying to call such a business.

This is pretty much what happens with OpenDNS: when your browser asks for a page from www.naughtystuff.com, the OpenDNS server points you to a different place, a nice page from OpenDNS that says that the page is blocked and explains why.

One fix for your Entire Network

There are many options available for “net nanny” style software that can be installed on individual machines, such as the kids’ machine. These features are also embedded in modern versions of Windows and OS X. But, what about all of the little portable devices that find themselves into kids’ hands? How about their gaming consoles?

Since you configure OpenDNS at the network entry point to your home, the router, any device attached to your network is automatically covered.

Customizable Blocking

You can use OpenDNS without an account, just by pointing your router to their servers, but the real power comes when you register with them (for free) and make your own choices about what you want to see.

You can choose which parts of the Internet you don’t want to see using their online configuration tool. You can either use their “High/Moderate/Medium/Low/Minimal” options or you can pick and choose individual bits of stuff to allow or block.

Here’s a look at the categories available when you choose the custom blocking level:

Basic Setup (about 20 minutes)

• Configure your router to use the OpenDNS servers for DNS lookups.
• Create a free OpenDNS account.
• Install their small updater program on one machine on your network.
• Log in to your OpenDNS Dashboard on the web and configure your blocking settings to taste.

Why do you need the updater utility?

In order to provide the custom blocking, the OpenDNS servers need to know your main IP address assigned by your Internet Server Provider. The desktop utility simply informs OpenDNS of your new IP address if it ever changes.

What do users see if they go to a blocked page?

They see a page that indicates the site that was blocked, along with a short reason and a link they can click if they want access to the page. If they click that link and fill out the short form, you will get an email from OpenDNS with the user’s request.

The remainder of the “blocked” page is a search form with some sponsored links.

You can customize the message as well as the image shown on the web page. When someone reaches a blocked page in my network, they are greeted by a picture of our calico cat, Roxy.

Keeping the Honest People Honest

This approach to blocking unwanted web sites is not a complete solution for keeping your kids from where they shouldn’t go; it is more like a simple padlock: it keeps the honest people honest. A determined individual can easily get around this product using various techniques, but they have to make a conscious effort to do so.

The real strength of OpenDNS is that it helps avoid accidental exposure to unwanted web content and phishing sites.