Advantages and disadvantages of cloud DNS

 Companies that are considering IT infrastructure outsourcing should also consider moving public DNS services to cloud service providers' managed DNS services. But before that, you have to understand the advantages and disadvantages. Let's look at each one.

 Benefits of Cloud DNS

Resilience

Cloud DNS provides reliability and fault tolerance with a fully redundant, geographically dispersed network and DNS server infrastructure. A company's internal DNS infrastructure often lacks this redundancy, especially because its own DNS servers do not share synchronized distributed domain information. Businesses must implement redundancy in their services. Failure of a DNS server without redundancy can have a significant business impact. If the network fails in the corporate network without internal and internet redundancy, connectivity to the DNS infrastructure is compromised. If the redundancy of the DNS server you are using is not high, the cloud DNS service will greatly improve resilience to the failure.

Companies often maintain DNS servers on the Internet barrier network and make them reach the world through TCP port 53 and UDP port 53. If there is only one authoritative DNS server in the enterprise, and if we serve the world here, there will be additional latency in query processing in remote areas. By leveraging a cloud DNS service provider with many DNS servers geographically dispersed and using anycast to deliver high availability and performance by directing traffic from the destination group to the nearest location, have.

Cloud DNS service providers use anycast to build a scalable and redundant DNS infrastructure. Enterprises need to invest a lot of money to implement this degree of redundancy using their own animate and BGP routing.

DNSSEC support

Domain Name System Security Extensions (DNSSEC) authenticate DNS records with cryptography and defend and protect many of the most common DNS security problems. However, there are many companies that have not yet introduced DNSSEC, because they are not familiar with the configuration and benefits. That's why it's easy to configure DNSSEC and lack a DNS server that can automatically perform key rotation and updates on a regular basis. A DNS administrator can cause a serious problem if he makes a mistake that he forgets to rotate the key every year. Cloud DNS service providers can automatically implement DNSSEC, implement it very easily, and automatically rotate keys.

 

DNS DDoS Protection If a company deploys its own DNS server, the capacity of this server can not defend a large DDoS attack against DNS servers. Companies need to invest a lot of money to build a highly scalable infrastructure that can absorb these attacks. Cloud DNS service providers can greatly enhance resilience to DNS DDoS attacks. The ability to absorb attack, expand to attack, and ability to quickly alleviate attacks are much better. Cloud DNS service providers also have the ability to automatically scale resources based on much more bandwidth links, diverse resources, and transaction size.

Improving Security Because

DNS is a service that is connected to the Internet, companies must continually monitor the security of the server, maintain patching, and ensure that the DNS resolver is not open. Cloud DNS service providers constantly patch, scan, secure, and monitor redundant DNS servers.

Advanced Traffic Routing

In addition, cloud DNS service providers offer advanced traffic routing capabilities that may not be feasible in an enterprise's internal DNS servers. For example, AWS's Route 53 Cloud DNS service supports several advanced traffic routing policies, including simple failover, round-robin, latency-based routing, geographic DNS, and proximity routing. To build this level of functionality for your enterprise, you need to build a geographically dispersed DNS server, with sophisticated load balancing at each location. In short, a lot of investment is needed.

Potential Cost Savings By using

cloud-based managed DNS services, you can save money by building multiple physical servers, licensing the operating system, and investing human resources in DNS maintenance and configuration. In particular, if you need DNS server hardware and software upgrades, it may be better to use cloud DNS services instead of spending capital on new DNS servers.

Better configuration / change tools

It can be difficult to change DNS quickly with existing systems in the enterprise. It may be difficult to automatically make software changes based on triggering events. It also runs internal IT processes that require submission of support tickets to DDI teams whenever changes or additions are required. Cloud DNS service providers have software-programmable interfaces and scripts. Based on this, DNS records are automatically generated and updated. You can dynamically add or change DNS resource records using the service provider's API.

Better monitoring, visibility and reporting

Many companies do not know the importance of DNS servers. I do not fully understand the 'dependency' that the whole IT infrastructure relies on DNS. Existing on-premises (internal) DNS systems may lack or lack the visibility and performance monitoring and operational metrics. On-premises DNS servers may not have useful reporting, useful insight (information) capabilities related to resolving DNS. Cloud DNS service providers monitor and maintain their infrastructure 24 hours a day to generate revenue.