DNS is an online directory which resolves host names to corresponding IP addresses. Google Public DNS is a global DNS (Domain Name System) which is provided as a free service by the search engine giant Google which can be used as alternative DNS instead of using the DNS assigned by your ISP. In order to use Google DNS you should configure your DNS server settings with IP addresses 220.127.116.11, 18.104.22.168 for IPV4 and 2001:4860:4860::8888, 2001:4860:4860::8844 for IPV6. As per the recent reports, Google Public DNS receives around seventy billion requests per day and is largest public DNS.
Majority of DNS service providers do not have the infrastructure to handle high volume of queries, caching and load balance among different servers. But Google Public DNS is based on powerful data center servers of Google with large scale caches, load balancing and can handle millions of concurrent queries in a robust and secure way without any issues.
By using Google Public DNS you can reduce the load on the DNS servers of your ISP. You can also make use of powerful infrastructure and high-speed data center servers of Google. Since DNS is vulnerable to different type of security attacks with can corrupt the name server cache of your DNS, it’s very important that your DNS is secure. Also DNS servers are prone to DoS (Denial of Service) attacks by hackers and illegitimate users. But Google DNS has various security benefits like rate limited of client traffic ad checking the authentic of DNS queries and responses from other servers.
OpenDNS is another free DNS service which provides additional features like phishing protection, auto- correction of spelling and content filtering. It’s an ad-supported service which means relevant advertisements will be displayed when using the free service and if you do not want ads to be displayed, you should opt for a paid service. Open DNS can be configured with IP addresses 22.214.171.124, 126.96.36.199, 188.8.131.52 and 184.108.40.206. For IPV6 addresses you can either use 2620:0:ccd::2 or 2620:0:ccc::2.
Though Google Public DNS can help increase your internet connection speed, Open DNS provides certain added benefits like faster, smarter and safer web browsing. Also, in terms of speed test open DNS can outperform Google public DNS. Open DNS can protect users from scams, botnets and phishing attacks since it’s implemented with advanced security features. As per recent survey, Open DNS is expected to handle more than 20 billion DNS requests per day.
Open supports DNSCurve and Smartcache which is a unique caching technology that ensures guaranteed resolving of your DNS queries and maximum uptime. OpenDNS provides a free service known as PhishTank which permits users to submit and review websites which they suspect to be phishing sites or scams.
When there is an outage of authoritative DNS server, certain major websites can turn offline for several hours or days making it impossible to access those websites. But with Smartcache technology from open DNS you can access those websites despite the outage of the authoritative name server. It also uses a technology called DNSCrypt which encrypts DNS queries coming from the user’s machine towards open DNS servers in different locations which makes it impossible for hackers to steal data using packet capture tools like ethereal.
Open DNS also helps you analyze the traffic in your network and shows detailed statistics of incoming and outgoing packets. It has a sophisticated user-interface and excellent reporting tools which helps users to make changes and rate limit traffic when required. Another important benefit of Open DNS is that it auto-corrects common typos and spelling mistakes in URLs when you surf the web. Hence, even if user mistypes the URLs open DNS can auto-correct it and lead to the right website.
There are other options like parental control, content filtering, DNS rebinding protection by filtering private IP addresses, phishing and scam protection, smart cache technology, auto-correction of URLs, network monitoring and statistics etc. Open DNS is based on cloud technology which could be deployed across diverse geographical locations and does not require any special hardware of software. It helps in reducing your infrastructure, increases network uptime and is scalable and secure.
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