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RPZ allows administrators to create rulesets to block certain domain names, but its power comes from the ability to harvest a list of domain names published by others, such as security research firms that have dedicated teams to curate and maintain the list. There are also features such as Response Policy Zone, that changes the way recursive DNS servers answer queries, to proactively prevent end users from resolving known malicious domain names. There are other protocol enhancements, such as DNS over TCP and DNS over HTTPS, that adds data privacy on top of DNS communication. The obvious enhancement is DNSSEC, which adds authentication and data integrity to the signed DNS data, but that is only a small fraction in the entire DNS security landscape.
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Taking actions such as disabling open recursion and implementing Response Rate Limiting are both helpful in the reduction of volumetric DDoS attacks on the Internet as a whole. This event also pointed up the need to consider configuration of DNS servers themselves. Because of this oversight, malicious attackers were able to gain access to the authoritative DNS server data, and modify records to lead users to the wrong IP addresses.
Security cloud dnc server update#
The warning highlighted that a core vulnerability in DNS security was the lack of protection of the data update process. In early 2019 the Department of Homeland Security (DHS) issued an urgent warning advising of potential DNS “hijacking.” The report detailed a hacking effort carried out by a cyber-espionage group believed to operate out of Iran that had manipulated DNS records for the domains of private companies and government agencies 1. This basic (and sometimes boring) layer is often overlooked when considering “DNS security,” but disastrous consequences can ensue when not properly maintained.
Security cloud dnc server software#
Components of DNS SecurityĭNS Security is the generic concept of securing the DNS service, this includes securing the service, the protocol itself, and other precautions and measures discussed in these pages.Īll the basics apply here: keeping the operating system secure, keeping the software up-to-date, having redundant systems in place to ensure service availability, maintaining secure update measures to ensure only authorized personnel can modify DNS entries, etc. Although it does not solve all of the security problems associated with DNS, it should definitely be part of the DNS security toolkit as it prevents some of the most damaging attacks from happening, such as cache poisoning. DNSSECĭNSSEC is a standardized solution to add authentication to DNS responses, providing authentication of the sender and the integrity of the message.
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The difference between DNSSEC and DNS security is that DNSSEC is part of DNS security, whereas DNS security is a larger, more general concept that covers a wide range of technologies and solutions.