Public DNS servers offer public service. They are servers that are provided by a company known as Granite Canyon Group, LLC. The service is offered to any user that needs it whether primary or secondary DNS without any charge. This service maintains the UPS, which is protected by FreeBSD servers that are used to satisfy any DNS queries. Public DNS serves several purposes and is useful to the user in various ways. When inside a firewall and there is need to access public name servers that are outside the firewall, when in need of names servers, which are closer to ideal internet backbones such as those for North America and when in need of secondary DNS servers. Users that are not able to acquire free services from an ISP and do not want to do it themselves, benefit from public DNS servers. Most of these DNS servers are privately owned, which means they offer their services to only those people that own and configure them. Public DNS servers on the other hand freely serve anyone in need. Their basic function involves translating hostnames into IP addresses. They are easily available on the net and provide users with the needed response.
People prefer to use public DNS servers so as to speed up their personal internet browsing. If a person looks at their IP configuration address they will find their current IP address DNS server and can easily change their IP to an IP address that suits their needs. Users need to be careful about public DNS servers since some have been found to be vulnerable to Kaminisky flaw. This flaw allows various hackers to succeed in sabotaging DNS servers. Once they do this they then send web visitors and users to various sites, which have been set up with the intention of hacking into the users systems.
Some users prefer fast DNS servers but unfortunately, public DNS servers are not as fast as most users would prefer them to be. One major reason for their being slow is that they are slow in direct proportion to how far they are located from the user. Increase in speed can only be possible with privately owned DNS servers that have forwarders to the users ISP’s servers. However, there are a few public DNS servers that have been noted to be speedy and efficient such as OpenDNS, janderso1. Users have to choose between paying for the service and using a slow public server.
