DNSSEC (Domain Name System Security Extensions) is a set of extensions to the Domain Name System (DNS) protocol that ensures the security and integrity of data transmitt through DNS. DNS itself is the underlying system that translates domain names, such as example.com , into IP addresses, which are us to identify devices on a network. Without DNS, we wouldn’t have easy-to-remember domain names in the form of words, but only complex IP addresses. However, the original design of DNS was not focus on security, which opens the door for various types of attacks, such as “cache poisoning”, where an attacker plants a fake IP address for a specific domain.
How does DNSSEC work?
DNSSEC adds a layer of cryptographic security to DNS that allows the authenticity and integrity of DNS responses to be verifi. This is achiev through digital signatures:
Digital signatures: Each DNS record can be sign using a private key. The corresponding public key is stor in a special DNS record (DNSKEY type record), which can be us to verify the authenticity of the record.
Chain of Trust: DNSSEC creates a “chain of trust” from the root zone to a specific domain. This means that each step in this chain can be verifi using keys from the parent zone, ensuring that DNS records have not been tamper with.
Authentication: When a client (eg your computer) receives a DNS response (from a DNS server), it can use the public key to verify that the record is genuine and has not been alter in transit.
Why is DNSSEC important?
DNSSEC plays a key role in Internet security as it protects domains from attacks that could rirect users to fake websites . Without DNSSEC, DNS records are vulnerable to various types of attacks, such as cache poisoning*, which can have serious consequences for both users and website operators. By implementing DNSSEC, you can be sure that communication between your website and users is secure and tamper-free.
Cache poisoning is an attack technique
On computer systems where an attacker manipulates the cache to insert malicious or false information into it. The goal is for this malicious content to be later retriev and treat as trustworthy, which can lead to various unwant or dangerous situations.
DNSSEC also contributes to the overall cribility of your online presence. If you run an e-shop, corporate website or other critical online service, deploying DNSSEC can strengthen customer trust in your brand and ruce the risk of them becoming victims of fraud.
How to set up DNSSEC on your own DNS server?
It’s easy with CZ domains. Thanks to automation by CZ.NIC (administrator of the CZ domain). Here’s a simple guide on how to do it:
Insert a CDSKEY entry:
Create a CDSKEY (Child DNSKEY) DNS record on your DNS server. This record should contain the public part of your DNSSEC key.
Verify the correctness of the entry:
Make sure the CDSKEY record is set indonesia phone number data correctly and available on all your authoritative nameservers. For this, you can use online tools for DNSSEC validation.
CZ.NIC takes control:
CZ.NIC automatically searches all CZ domains once a day and looks for CDSKEY records. If it finds a valid albert einstein later prov their existence record for your domain, it will start the automat DNSSEC setup process.
Verification and activation:
CZ.NIC verifies for 7 days whether the CDSKEY record is consistent on all your nameservers. If so, it will create a cg leads new keyset prefix with “AUTO-” from it and assign it to your domain.
Done!
Your domain is now secur by DNSSEC and CZ.NIC will take care of key.