![]() If, for some reason, the primary name server has a problem, the secondary name server kicks in, allowing us to guarantee a 99.9% uptime for your website. If, however, this one is unreachable too, the request is routed down the whole chain of name servers until the requested IP address matching the domain name your visitor types in the address bar is located by the DNS server.Īt NTC Hosting we offer two NS servers, which is more than enough in 99% of the cases. If, for some reason, your primary name server cannot be reached at a given time, your visitor's DNS resolution request is routed to the secondary server set for your domain. In the simplest case, all you need to do is to create a text file in the directory /etc/resolver/ with the same name as the desired domain, and define the nameservers inside. Having more than one name server (a DNS record type) set to your domain name provides redundancy, and works for ensuring your website's availability at all times. ![]() For new domain registrations, the NS records are usually automatically provided and set to the default DNS records of the respective registrar.Īn NS record change usually takes about 24 hours to propagate worldwide and will affect the domain's availability online, so NS changes are recommended only if you know what you are doing. The NS records are usually the first records specified in a DNS zone, right after the SOA. Each domain name must have at least two NS records, and each NS record must have an IP address assigned to it, in order to be working properly. Your PC or Mac also has a local DNS cache, and if the cache gets screwed up, you can have trouble visiting certain sites. You may see a DNS server referred to by other. DNS servers run special software and communicate with each other using special protocols. ![]() They are defined with "NS" in a DNS zone. A DNS server is a computer server that contains a database of public IP addresses and their associated hostnames, and in most cases serves to resolve, or translate, those names to IP addresses as requested. The name server records are vital for a domain name - they specify the hosting server the domain name is located on.
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