Why Is Proper Dns Functionality Essential For Website Uptime And Performance?
Whether you are hosting your website on your own server or with a web
hosting service, proper functionality of Domain Name System (DNS) is
essential for ensuring uptime and performance of your website. Even if
your entire web server infrastructure is working fine, a tricky DNS
problem can result in an unresponsive site. Thus, it is important to
include DNS monitoring in your website monitoring strategy to protect
your online presence as well as to enhance end-user experience.
Role of DNS:
DNS is responsible for translating an easy-to-remember website name like
www.example.com into its respective IP address of the web server that
hosts the site. When a user requests for your website by typing its name
in the browser, the DNS infrastructure points it to the address of the
web server. If the site is hosted in multiple locations, it will point
to the one closest to the requesting user. Once the browser has the IP
address of the web server, it will then issue an HTTP request for the
web page. Thus, you can see how DNS is crucial in making your website
reach your customer.
DNS related issues – what may go wrong:
DNS configuration and resolution is often complex and tricky. Since a
DNS resolution includes a series of steps, a problem during any of the
steps can fail the entire process.
•Unavailability of DNS server: The DNS server is like any other
technological infrastructure that may go down due to scheduled or
unscheduled outages. When the DNS server serving information about your
website goes down, the client will be unable to get details of your web
server to issue an HTTP request.
•Improper DNS configuration: Improper configuration of a DNS server can
occur during initial set up of the domain, or later as needs change and
configuration changes become necessary. You may have heard about sites
not working for users from specific locations. This is the result of
erroneous DNS configuration where the DNS servers will not return IP
addresses for requests coming from impacted areas. Other configuration
errors may result in lost e-mail or complete inaccessibility of the
site.
•Latency in DNS resolution: Latency results in slow loading of the site,
though your web hosting infrastructure is working perfectly. If a
request cannot be served from DNS cache, it has to recursively query
other nameservers, resulting in latency. Overload of a DNS server can
also result in latency of DNS requests.
•DNS cache poisoning: Local DNS resolvers with less security can often
fall prey to an attacker who can insert a fake address record for your
domain name into the DNS. Using this, the attacker can tamper with cache
records of the resolver to point your domain name to a phishing site.
Such attacks are difficult to detect, especially from data centers.
Continuous monitoring of DNS:
When you opt for a website monitoring service, make sure that it also
includes monitoring of DNS resolution of your website. DNS monitoring
includes a series of tests like HostName test, MX lookup, Reverse DNS,
Blacklist check, etc., to ensure that your website visibility is not
impacted because of some DNS error. Conducting these tests from multiple
locations will ensure that your site is not impacted due to some
erroneous DNS configuration, and is working perfectly for users all
across the world.
The vitality of proper DNS management increases as the business grows in
terms of online presence. Effective DNS monitoring ensures that your
website is not facing outages or degraded performance due to DNS related
problems.
