I am using a DNS service ( like unlocator.com) in order for me to watch Netflix.com because I am located outside US.
Recently, I found that Netflix ( and also Amazon Prime) videos are very slow and keep on buffering. However, whenever I do a speed test, the speed is always good ( ~5Mbps). Usually with this kind of speed, I can stream netflix videos well, no problem. But not recently.
I have no problem streaming Youtube videos, even HD ones.
I am trying to find out the real problem. My friend said the DNS service ( unlocator.com) can be the culprit. But I thought DNS service only takes care of the geographic checks and nothing else, and hence it shouldn't impact the video streaming quality.
Am I right?
Best Answer
You are right that DNS is just used to look up addresses, and I can see why you'd be confused as to why someone would suggest that different DNS services can slow down your actual transfer speeds.
DNS services like Unlocator.com are not just DNS services, they are for making you appear like you're in a different country so you can watch country-specific content, while not being in that country.
They do this by having custom DNS entries for certain sites (like say, Netflix.com) so that when you request those domain names they are redirected to a transparent proxy which makes you appear to Netflix like you're coming from wherever that proxy is located.
Since all the traffic is being sent through this additional proxy, this proxy can become congested, causing slowdowns in traffic between you and Netflix.