Your internet connection, by default is using the DNS as provided by whoever your ISP is.
The fact is, you do not have to stick with the ISP’s DNS if you don’t want to. Alternatively, there are many 3rd parties DNS providers that you can use.
What is DNS?
The most popular and widely used among the 3rd party DNS are Google Public DNS and OpenDNS.
The Google Public DNS IP addresses (IPv4) are as follows:
OpenDNS IP Addresses
- Reliability – The DNS servers of your ISP can never matched the 3rd party providers in terms of reliability. The redundancy built-in to those 3rd party DNS servers ensure that the downtime is minimized or eliminated. Most but not all ISPs treat the DNS servers as a cost centre. Which in turn shows in the level of investment to install and maintain the DNS servers. If you are experiencing slow response when you are trying to reach a website or even worse, the website fail to load at all. Then changing from your ISP’s DNS to the 3rd party might help to speed up your browsing experience.
- Security – GoogleDNS and OpenDNS have incorporated some security features that are not implemented by the major ISP to their DNS. For instance, DNSSEC which is used to ensure all DNS requests are signed and verified. DNS with weak security strength is prone to “poisoning“. A type of exploit that redirect your request for a legitimate website to a shady address which may harm or compromise your device.
- Control – You can set up web filtering criteria with 3rd party DNS. OpenDNS provide an easy way to have control over what your children can access on the internet. Or if you are an employer who preferred your staff do not use company resources to access non-work related websites or services, then changing to OpenDNS will give you that option.
- Speed – A 3rd part DNS may have significant speed advantage over the default ISP’s DNS. A DNS might not response instantly if the requests for web addresses are high and the server is overloaded. On the other hand, Google Public DNS is built on a robust server network with a lot of redundancies. This configuration make sure that every request will be resolved almost instantaneously.
- Web censorship – The ISP level censorship is most probably done using DNS. If you are unable to access certain websites which are prohibited at your location, you can bypass such censorship by changing to 3rd party DNS.