DNS Forwarding

Obviously using a good ISP is the best way to start off when you set up a new network, but there is a lot more you can do to speed up your network. A DNS forwarding server is one way in which you can speed up your network – in fact it works so well that it is basically common practice today.

Explaining DNS forwarding

When you want to speed up the DNS name resolution process you should immediately think about DNS forwarding as a solution. DNS forwarding really helps when a user requests a domain name but the user’s DNS server cannot find the matching IP address in its DNS cache, or within its zones of authority. After all, the DNS server is responsible for converting the domain name into the IP address that corresponds to it. Instead, queries for a non-resolvable address can be referred to other name servers using the forward-DNS-resolution-request function.

DNS forwarding is particularly useful where companies and individuals have very large namespaces. Companies that are collaborating can also use DNS forwarding to resolve each other’s namespace, thereby accelerating name resolution if any of the companies are experiencing problems resolving domains.

But how does DNS forwarding actually work?

When internal DNS information is private there can be a big security issue if this information is transmitted online. This can happen when the root hints of the domain query server is exposed to the public because no DNS forwarder is used in the internal network. Secondly, if the prices of the network’s ISP is high or if the connection is slow the lack of an internal DNS forwarder can complicate matters as it leads to more external traffic.

By setting up a DNS forwarder you make it responsible for external traffic. In doing so the DNS forwarder will build an internal cache of external DNS data. In turn it will continue to use this cache of external DNS data to minimize external DNS traffic.

Please note that technologies described on Wiki pages are not necessary the part of Plesk control panel or its extensions.

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