May 04, 2012

What are the advantages and drawbacks of using OpenDNS?

I've been thinking about signing up for OpenDNS for a while, and a friend just told me that if I was using OpenDNS I wouldn't have to even think of Flashback. Is that true? I thought OpenDNS was mostly for filtering web sites, which is significant issue with two 14 year old boys in my house. I never considered it as a security tool per se. Is it also useful for that?  Also, are there any drawback to OpenDNS?  Does it significantly slow download speeds, for example? Thanks for your help.



faster, reliable and secure simple installation, and easy interface helps in malware and botnet protection...



Sandeep Seeram





OpenDNS prevents Flashback infection, and if your machine has already been infected, it will at least prevent the malware from connecting back to its command and control server.  My next door neighbor, who has two teenage children like the OP, uses OpenDNS to keep his shorties from becoming pr0n junkies, and he and I use each others WiFi pretty regularly when we are hanging out.  As far as speed goes, I haven't noticed anything negative.  He has a cable connection and I have DSL, and he still has faster download speeds with OpenDNS.  The only thing that I actually notice is the filtering blocks access to a very broad range of web sites, some of which I have no idea why, but that is due to his strict filtering.  As far as malware/botnet security goes, OpenDNS will prevent DNS request to malicious servers; DNS responses containing IP addresses listed in RFC1918 will be filtered out.  Sites known to be vehicles for distributing malware or phishing are also filtered out.  It's a pretty comprehensive service, and it is probably worth a try for you.  

Here's some background. It sounds like it could be a useful service.


"OpenDNS secures the networks used by more than 30 million people to connect to the Internet. Across all continents, in Fortune 50 enterprises and small businesses alike, at one in every three U.S. schools and hundreds of thousands of homes. Our services are smart and lightweight, yet more powerful than anything else available. They require no software or hardware, and can be set up in just minutes, immediately taking effect across all devices that connect to the Internet -- tablets, smartphones, even gaming consoles. Ask anyone who's deployed a network service across an enterprise and they'll tell you just how revolutionary that is. We're changing the face of Internet security."
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