--- title: "DNS Vulnerabilities: Major Threats, Risks, and How to Reduce Exposure | DuoCircle" description: "Learn about major DNS vulnerabilities, security risks, and proven ways to reduce exposure, prevent attacks, and strengthen your domain protection." image: "https://www.duocircle.com/images/og-default.png" canonical: "https://www.duocircle.com/blog/dns-vulnerabilities-major-threats-risks-and-how-to-reduce-exposure/" --- Quick Answer DNS vulnerabilities can expose domains to spoofing, cache poisoning, DDoS attacks, and data theft. Common risks include misconfigured DNS records, outdated servers, and weak security controls. Reducing exposure requires DNSSEC, regular monitoring, access controls, and timely updates. Share [ ](https://www.linkedin.com/sharing/share-offsite/?url=undefined%2Fblog%2Fdns-vulnerabilities-major-threats-risks-and-how-to-reduce-exposure%2F "Share on LinkedIn") [ ](https://twitter.com/intent/tweet?text=DNS%20Vulnerabilities%3A%20Major%20Threats%2C%20Risks%2C%20and%20How%20to%20Reduce%20Exposure&url=undefined%2Fblog%2Fdns-vulnerabilities-major-threats-risks-and-how-to-reduce-exposure%2F "Share on X/Twitter") [ ](https://www.facebook.com/sharer/sharer.php?u=undefined%2Fblog%2Fdns-vulnerabilities-major-threats-risks-and-how-to-reduce-exposure%2F "Share on Facebook") [ ](https://reddit.com/submit?url=undefined%2Fblog%2Fdns-vulnerabilities-major-threats-risks-and-how-to-reduce-exposure%2F&title=DNS%20Vulnerabilities%3A%20Major%20Threats%2C%20Risks%2C%20and%20How%20to%20Reduce%20Exposure "Share on Reddit") [ ](mailto:?subject=DNS%20Vulnerabilities%3A%20Major%20Threats%2C%20Risks%2C%20and%20How%20to%20Reduce%20Exposure&body=Check out this article: undefined%2Fblog%2Fdns-vulnerabilities-major-threats-risks-and-how-to-reduce-exposure%2F "Share via Email") ![DNS Vulnerabilities](https://media.mailhop.org/duocircle/smtp-service-1258-1779877068497.jpg) The Domain Name System (DNS) is one of the core technologies that keeps the internet functioning. Every time a user types a website address into a browser, DNS translates that readable domain into the **numerical IP address** needed to connect to the correct server. Because nearly every online service depends on DNS, attackers frequently target it to interrupt operations, [steal information](https://cybernews.com/security/billions-credentials-exposed-infostealers-data-leak/), redirect traffic, or distribute malicious content. _Weak DNS security can expose organizations to phishing campaigns, service outages, data interception, and unauthorized network access_. Misconfigured servers, outdated software, and insufficient monitoring often create opportunities for cybercriminals to exploit [DNS infrastructure](https://medium.com/@ayushi.khare20/demystifying-dns-infrastructure-the-backbone-of-the-internet-700719da22ab). Understanding these vulnerabilities is essential for improving network resilience and protecting business operations. ## What Are DNS Vulnerabilities? **DNS vulnerabilities** are weaknesses within DNS infrastructure, server configurations, or supporting protocols that attackers can exploit to manipulate traffic, disrupt services, or compromise sensitive data. These weaknesses may result from improper security settings, unpatched software, unsecured DNS resolvers, or the absence of protective technologies like DNSSEC. Since DNS requests occur continuously across nearly every online interaction, even a small weakness can create large-scale security problems. Attackers commonly use DNS vulnerabilities to redirect users to fraudulent websites, launch distributed [denial-of-service attacks](https://therecord.media/canadian-man-arrested-charged-running-kimwolf-botnet), or intercept communications. ## Why DNS Security Is So Important DNS functions as a foundational layer of internet communication. If attackers compromise DNS systems, they can influence where users connect online. This makes DNS a high-value target for [cybercriminals](https://incyber.org/en/article/united-states-amounts-stolen-by-cybercriminals-up-33/), state-sponsored groups, and botnet operators. ![What Is DKIM 1259](https://media.mailhop.org/duocircle/what-is-dkim-1259-1779877479196.jpg) Poor DNS security may lead to: - Website downtime - Email delivery problems - Credential theft - Data interception - Malware distribution - [Brand impersonation](https://www.securitymagazine.com/articles/101485-brand-impersonation-is-51-of-browser-phishing-attempts?%5F%5Fcf%5Fchl%5Frt%5Ftk=rynJ3mFbjGkTVK9g1Ly7e0Wtlfj%5FRBXIXFu97w1F4fw-1779783217-1.0.1.1-XaU45A2ZaCsiDCj0UeTv.VLB8fDHudpdyHAqoXMb%5Feg) - Network slowdowns - Customer trust issues Organizations that depend on cloud services, remote access systems, online applications, or email communication are especially vulnerable when **DNS protections** are weak. ## Common DNS Vulnerabilities That Put Networks at Risk Several DNS-related weaknesses continue to affect organizations worldwide. Some attacks rely on technical flaws, while others succeed because of configuration mistakes or poor security practices. ### 1\. Open DNS Resolvers An open DNS resolver accepts queries from any external source on the internet instead of limiting requests to authorized users. Attackers often abuse these publicly accessible resolvers to amplify traffic during distributed denial-of-service attacks. In a DNS amplification attack, attackers send [small spoofed requests](https://www.cybersecuritydive.com/news/fbi-us-officials-impersonated-text-ai-voice/748334/) that generate much larger responses directed toward the victim. This creates massive traffic floods capable of overwhelming servers and disrupting services. #### Risks Associated with Open Resolvers - [DDoS amplification attacks](https://www.cybersecuritydive.com/news/record-ddos-attack-microsoft-azure/805886/) - Increased bandwidth consumption - Network performance degradation - Infrastructure abuse by attackers - Higher operational costs #### How to Reduce the Risk - Restrict recursive DNS queries to trusted networks - Disable public access where unnecessary - [Apply access control lists (ACLs)](https://www.geeksforgeeks.org/computer-networks/access-lists-acl/) - Monitor abnormal traffic spikes - Regularly audit resolver configurations ### 2\. DNS Cache Poisoning [DNS cache poisoning](https://thehackernews.com/2021/11/new-side-channel-attacks-re-enable.html) occurs when false DNS information is inserted into a resolver cache. Once poisoned data is stored, users may unknowingly be redirected to malicious websites even when entering legitimate domain names. Attackers commonly use this technique to [steal login credentials](https://www.securitymagazine.com/articles/102054-630m-passwords-stolen-fbi-reveals-what-this-says-about-credential-value), distribute malware, or intercept sensitive communications. #### Effects of Cache Poisoning - Redirected website traffic - Credential harvesting - [Malware infections](https://www.trendmicro.com/en%5Fus/research/25/j/self-propagating-malware-spreads-via-whatsapp.html) - Financial fraud - Loss of customer confidence #### Prevention Strategies - Enable DNSSEC validation - Keep DNS software updated - Randomize source ports and query IDs - Reduce cache exposure - Monitor suspicious DNS responses ### 3\. Lack of DNSSEC Implementation DNSSEC, or Domain Name System Security Extensions, helps validate DNS responses through **cryptographic signatures**. Without DNSSEC, attackers may forge DNS responses and manipulate traffic without detection.![Dkim Selector 1260](https://media.mailhop.org/duocircle/dkim-selector-1260-1779877555755.jpg) Organizations that do not deploy DNSSEC leave themselves more vulnerable to spoofing attacks and forged [DNS records](https://www.ibm.com/think/topics/dns-records). #### Benefits of DNSSEC - Improves DNS data authenticity - Reduces spoofing risks - Helps prevent forged responses - Strengthens trust in **DNS communication** #### Challenges of DNSSEC _Although DNSSEC improves integrity, poor implementation can introduce operational complexity_. Improper configurations may lead to validation failures or service interruptions. #### Best Practices - Properly sign DNS zones - Monitor DNSSEC validation - Rotate keys securely - Use supported DNS providers - Test configurations before deployment ### 4\. DNS Tunneling DNS tunneling allows attackers to hide malicious communications inside DNS queries and responses. Since DNS traffic is often trusted and allowed through firewalls, attackers can use tunneling to **bypass security controls**. #### Cybercriminals frequently use DNS tunneling for: - [Data exfiltration](https://www.darkreading.com/endpoint-security/akira-ransomware-lightning-fast-data-exfiltration-2-hours) - Malware command-and-control traffic - Remote access communication - Covert network activity #### Signs of DNS Tunneling Activity - Large DNS query volumes - Unusually long domain names - Frequent TXT record requests - Suspicious outbound DNS traffic - Repetitive query patterns #### How to Detect and Prevent It - Monitor DNS traffic behavior - Block suspicious outbound requests - Implement DNS filtering - Use intrusion detection systems - Analyze abnormal [DNS query](https://www.cloudns.net/wiki/article/254/) lengths ![Dkim Validation 1261](https://media.mailhop.org/duocircle/dkim-validation-1261-1779877655407.jpg) ### 5\. Weak DNS Server Configurations _Improperly configured DNS servers remain one of the most common causes of DNS-related security incidents_. Default settings, outdated software, unnecessary services, and exposed administrative interfaces all increase risk. #### Common Configuration Problems - Public zone transfers - Weak access permissions - Unpatched DNS software - Insecure management interfaces - Excessive recursion permissions #### Recommended Security Measures - Disable unused services - Apply regular software updates - Restrict administrative access - Use strong authentication controls - Conduct periodic configuration reviews ### 6\. Distributed Denial-of-Service (DDoS) Attacks DNS infrastructure is frequently targeted by DDoS attacks **designed to overwhelm servers** with excessive traffic. DNS-based DDoS attacks can disrupt websites, applications, and email services. Attackers often **combine botnets** with amplification techniques to increase attack size dramatically. #### Consequences of DNS DDoS Attacks - Website outages - Service disruptions - Revenue loss - Reduced customer trust - Increased recovery expenses #### Mitigation Techniques - Use DDoS protection services - Deploy traffic filtering - Implement rate limiting - Use redundant DNS providers - Distribute infrastructure geographically ### 7\. DNS Hijacking DNS hijacking occurs when attackers alter [DNS settings](https://www.ntchosting.com/encyclopedia/dns/settings/) to redirect users to unauthorized destinations. This can happen through compromised routers, stolen registrar credentials, malware infections, or unauthorized DNS changes. #### Potential Outcomes - Fake login pages - Malware delivery - Credential theft - Traffic interception - Brand impersonation #### Prevention Tips - Secure registrar accounts with MFA - Monitor DNS record changes - Lock critical domains - Audit administrative access - Use secure password practices ### 8\. Vulnerable DNS Protocols and Software Outdated DNS software may **contain security flaws** that attackers can exploit to gain unauthorized access, crash services, or manipulate DNS responses. DNS vulnerabilities are regularly discovered in widely used platforms, making software updates critical for maintaining security. ![DMARC Generator 1263](https://media.mailhop.org/duocircle/dmarc-generator-1263-1779877748095.jpg) #### Risks of Unpatched DNS Systems - Remote code execution - Service crashes - Cache poisoning - Memory corruption - Unauthorized access #### Security Recommendations - Apply vendor patches promptly - Track vulnerability advisories - Remove unsupported software - Conduct vulnerability assessments - Test systems regularly ## The Business Impact of DNS Attacks _DNS attacks can create severe operational and financial consequences for businesses of all sizes_. Even short disruptions may affect productivity, customer experience, and online revenue. ### Financial Risks - Downtime costs - Incident response expenses - Regulatory penalties - Lost transactions - Increased recovery spending ### Reputational Damage Customers expect websites and online services to remain available and secure. DNS-related incidents can weaken customer confidence and damage [brand reputation](https://www.simpplr.com/glossary/brand-reputation/). ### Operational Disruption DNS outages may interrupt: - Email communication - **Remote access systems** - Cloud applications - Online transactions - Internal business operations ## DNS Monitoring and Visibility _Continuous DNS monitoring helps organizations identify suspicious behavior before it escalates into a major incident_. Visibility into DNS activity **allows security teams** to detect unusual changes, unauthorized record modifications, or traffic anomalies. ### What Organizations Should Monitor - DNS record changes - Resolver activity - Failed DNS lookups - Traffic spikes - Query anomalies - Unauthorized configuration updates ### Benefits of DNS Monitoring - Faster incident detection - Improved troubleshooting - Better threat visibility - Reduced downtime - Stronger compliance support ## Best Practices for Strengthening DNS Security A strong DNS security strategy **combines configuration** hardening, monitoring, access control, and proactive maintenance. ### Recommended DNS Security Practices - **Enable DNSSEC:** DNSSEC helps validate DNS responses and reduce spoofing risks. - **Restrict Resolver Access:** Avoid exposing recursive resolvers to the **public internet** unless absolutely necessary. - **Use Redundant DNS Providers:** _Redundant infrastructure improves availability during outages or attacks_. - **Monitor DNS Activity:** Regular monitoring helps identify suspicious traffic and unauthorized changes. - **Keep Software Updated|:** Apply security patches promptly to reduce exposure to known vulnerabilities. - **Secure Administrative Access:** Use strong passwords, [multi-factor authentication](https://www.ibm.com/think/topics/multi-factor-authentication), and restricted access controls. - **Audit DNS Configurations Regularly:** Routine reviews **help identify outdated settings**, unused services, and security gaps. - **Implement Traffic Filtering:** DNS filtering can block access to malicious domains and reduce exposure to threats. ## DNS Security and Email Protection DNS also plays a major role in **email authentication technologies** such as [SPF](https://www.duocircle.com/email/spf-management/), DKIM, and DMARC. Improper DNS configurations may weaken [email security](https://www.duocircle.com/) and increase exposure to phishing or spoofing attacks. Organizations should regularly review email-related DNS records to ensure proper authentication policies are in place. ### Important Email Authentication Protocols - SPF (Sender Policy Framework) - [DKIM](https://www.duocircle.com/blog/email-hosting/how-to-setup-dkim-for-your-domain-a-complete-email-authentication-guide) (DomainKeys Identified Mail) - [DMARC](https://www.duocircle.com/email/dmarc/) (Domain-based Message Authentication, Reporting, and Conformance) Correctly configured DNS records help improve email security, **protect domain reputation**, and reduce [spoofing attempts](https://www.bbc.com/news/articles/cp85rpm0lq8o). ![Spf Record 4588](https://media.mailhop.org/duocircle/spf-record-4588-1779878130133.jpg) ## Future DNS Security Challenges As cyber threats continue evolving, DNS infrastructure will remain a major attack target. Cloud adoption, remote work, [IoT expansion](https://www.fortinet.com/resources/cyberglossary/iot), and **growing internet dependency** all increase the importance of DNS security. Emerging threats may include: - More advanced DNS tunneling techniques - AI-driven phishing infrastructure - Sophisticated amplification attacks - Automated DNS exploitation - Supply chain attacks targeting DNS providers Organizations that fail to modernize DNS security practices may face increasing exposure over time. ## Final Thoughts DNS security is often overlooked despite its critical importance to internet operations. Weak DNS protections can expose organizations to [phishing attacks](https://www.securityweek.com/security-firm-executive-targeted-in-sophisticated-phishing-attack/), service disruptions, malware distribution, and traffic manipulation. _Since DNS supports websites, applications, and email communication, even a single vulnerability can create widespread operational problems_. Reducing DNS risk requires a combination of **secure configurations**, software updates, DNSSEC deployment, monitoring, and access controls. Organizations that proactively strengthen [DNS infrastructure](https://medium.com/@ayushi.khare20/demystifying-dns-infrastructure-the-backbone-of-the-internet-700719da22ab) are better positioned to prevent attacks, maintain service availability, and protect sensitive information from evolving cyber threats. ![Brad Slavin](https://media.mailhop.org/dmarcreport/images/team/brad-slavin.jpg) Brad Slavin General Manager General Manager at DuoCircle. Product strategy and commercial lead across the email security portfolio. ## Secure your email infrastructure Protect, authenticate, and deliver. Contact our team to find the right solution. [Contact Sales](/contact/) [Explore Products](/products/) ## Related Articles [ intermediate 10 DKIM Authentication Testing Reports Every Security Team Should Review Jun 1, 2026 ](/blog/10-dkim-authentication-testing-reports-every-security-team-should-review/)[ intermediate 11 Preventing SPF Configuration Errors Recommendations For Managed Service Providers (MSPs) Jun 5, 2026 ](/blog/11-preventing-spf-configuration-errors-recommendations-for-managed-service-providers/)[ intermediate 15 SPF Record Validation Mistakes That Cause Email Delivery Failures May 26, 2026 ](/blog/15-spf-record-validation-mistakes-that-cause-email-delivery-failures/)[ intermediate 20 Common Threats To Domain Reputation Protection And How To Avoid Them May 22, 2026 ](/blog/20-common-threats-domain-reputation-protection-how-to-avoid-them/) ```json {"@context":"https://schema.org","@type":"Organization","name":"DuoCircle LLC","url":"https://www.duocircle.com","logo":{"@type":"ImageObject","url":"https://www.duocircle.com/images/duocircle-logo.png"},"description":"DuoCircle is a portfolio of specialized email products covering protection, authentication, delivery, and routing. We deliver about 90% of category-leader capability at roughly half the price, backed by experts who own the outcome. Trusted by 50,000+ organizations since 2014.","subOrganization":[{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138898167","name":"DMARC Report","url":"https://dmarcreport.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897474","name":"AutoSPF","url":"https://autospf.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897912","name":"Phish Protection","url":"https://www.phishprotection.com"}],"sameAs":["https://www.linkedin.com/company/duocircle","https://x.com/duocirclellc","https://www.facebook.com/duocirclellc","https://www.g2.com/products/phish-protection-by-duocircle/reviews","https://github.com/duocircle","https://www.crunchbase.com/organization/duocircle-llc"],"contactPoint":{"@type":"ContactPoint","contactType":"customer support","url":"https://support.duocircle.com"},"knowsAbout":["Email Security","Email Authentication","SPF","DKIM","DMARC","Phishing Protection","Spam Filtering","SMTP Relay","Email Deliverability","Email Forwarding"]} ``` ```json {"@context":"https://schema.org","@type":"WebSite","name":"DuoCircle LLC","url":"https://www.duocircle.com","description":"DuoCircle is a portfolio of specialized email products covering protection, authentication, delivery, and routing. We deliver about 90% of category-leader capability at roughly half the price, backed by experts who own the outcome. Trusted by 50,000+ organizations since 2014.","publisher":{"@type":"Organization","name":"DuoCircle LLC","url":"https://www.duocircle.com","logo":{"@type":"ImageObject","url":"https://www.duocircle.com/images/duocircle-logo.png"},"description":"DuoCircle is a portfolio of specialized email products covering protection, authentication, delivery, and routing. We deliver about 90% of category-leader capability at roughly half the price, backed by experts who own the outcome. Trusted by 50,000+ organizations since 2014.","subOrganization":[{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138898167","name":"DMARC Report","url":"https://dmarcreport.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897474","name":"AutoSPF","url":"https://autospf.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897912","name":"Phish Protection","url":"https://www.phishprotection.com"}]}} ``` ```json [{"@context":"https://schema.org","@type":"BlogPosting","headline":"DNS Vulnerabilities: Major Threats, Risks, and How to Reduce Exposure","description":"Learn about major DNS vulnerabilities, security risks, and proven ways to reduce exposure, prevent attacks, and strengthen your domain protection.","url":"https://www.duocircle.com/blog/dns-vulnerabilities-major-threats-risks-and-how-to-reduce-exposure/","datePublished":"2026-05-27T00:00:00.000Z","dateModified":"2026-05-27T00:00:00.000Z","dateCreated":"2026-05-27T00:00:00.000Z","author":{"@type":"Person","@id":"https://www.duocircle.com/authors/brad-slavin/#person","name":"Brad Slavin","url":"https://www.duocircle.com/authors/brad-slavin/","jobTitle":"General Manager","description":"Brad Slavin runs DuoCircle, the company behind DMARC Report, AutoSPF, Phish Protection, and Mailhop. His focus is product strategy, customer relationships, and the commercial and compliance side of email authentication (DPAs, SLAs, enterprise procurement).","image":"https://media.mailhop.org/dmarcreport/images/team/brad-slavin.jpg","knowsAbout":["Email Security Strategy","SaaS Product Management","Enterprise Compliance","Customer Success","Email Deliverability Business"],"worksFor":{"@type":"Organization","name":"DuoCircle LLC","url":"https://www.duocircle.com"},"sameAs":["https://www.linkedin.com/in/bradslavin"]},"publisher":{"@type":"Organization","name":"DuoCircle LLC","url":"https://www.duocircle.com","logo":{"@type":"ImageObject","url":"https://www.duocircle.com/images/duocircle-logo.png"},"description":"DuoCircle is a portfolio of specialized email products covering protection, authentication, delivery, and routing. We deliver about 90% of category-leader capability at roughly half the price, backed by experts who own the outcome. Trusted by 50,000+ organizations since 2014.","subOrganization":[{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138898167","name":"DMARC Report","url":"https://dmarcreport.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897474","name":"AutoSPF","url":"https://autospf.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897912","name":"Phish Protection","url":"https://www.phishprotection.com"}]},"mainEntityOfPage":{"@type":"WebPage","@id":"https://www.duocircle.com/blog/dns-vulnerabilities-major-threats-risks-and-how-to-reduce-exposure/"},"articleSection":"intermediate","keywords":"","image":{"@type":"ImageObject","url":"https://media.mailhop.org/duocircle/smtp-service-1258-1779877068497.jpg","caption":"DNS Vulnerabilities"},"speakable":{"@type":"SpeakableSpecification","cssSelector":[".answer-block","h1"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Blog","item":"https://www.duocircle.com/blog/"},{"@type":"ListItem","position":2,"name":"intermediate"},{"@type":"ListItem","position":3,"name":"DNS Vulnerabilities: Major Threats, Risks, and How to Reduce Exposure","item":"https://www.duocircle.com/blog/dns-vulnerabilities-major-threats-risks-and-how-to-reduce-exposure/"}]}] ``` ```json {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://www.duocircle.com/"},{"@type":"ListItem","position":2,"name":"Blog","item":"https://www.duocircle.com/blog/"},{"@type":"ListItem","position":3,"name":"intermediate","item":"https://www.duocircle.comundefined"},{"@type":"ListItem","position":4,"name":"DNS Vulnerabilities: Major Threats, Risks, and How to Reduce Exposure","item":"https://www.duocircle.com/blog/dns-vulnerabilities-major-threats-risks-and-how-to-reduce-exposure/"}]} ``` ```json {"@context":"https://schema.org","@type":"BlogPosting","headline":"DNS Vulnerabilities: Major Threats, Risks, and How to Reduce Exposure","description":"Learn about major DNS vulnerabilities, security risks, and proven ways to reduce exposure, prevent attacks, and strengthen your domain protection.","url":"https://www.duocircle.com/blog/dns-vulnerabilities-major-threats-risks-and-how-to-reduce-exposure/","datePublished":"2026-05-27T00:00:00.000Z","dateModified":"2026-05-27T00:00:00.000Z","dateCreated":"2026-05-27T00:00:00.000Z","author":{"@type":"Person","@id":"https://www.duocircle.com/authors/brad-slavin/#person","name":"Brad Slavin","url":"https://www.duocircle.com/authors/brad-slavin/","jobTitle":"General Manager","description":"Brad Slavin runs DuoCircle, the company behind DMARC Report, AutoSPF, Phish Protection, and Mailhop. His focus is product strategy, customer relationships, and the commercial and compliance side of email authentication (DPAs, SLAs, enterprise procurement).","image":"https://media.mailhop.org/dmarcreport/images/team/brad-slavin.jpg","knowsAbout":["Email Security Strategy","SaaS Product Management","Enterprise Compliance","Customer Success","Email Deliverability Business"],"worksFor":{"@type":"Organization","name":"DuoCircle LLC","url":"https://www.duocircle.com"},"sameAs":["https://www.linkedin.com/in/bradslavin"]},"publisher":{"@type":"Organization","name":"DuoCircle LLC","url":"https://www.duocircle.com","logo":{"@type":"ImageObject","url":"https://www.duocircle.com/images/duocircle-logo.png"},"description":"DuoCircle is a portfolio of specialized email products covering protection, authentication, delivery, and routing. We deliver about 90% of category-leader capability at roughly half the price, backed by experts who own the outcome. Trusted by 50,000+ organizations since 2014.","subOrganization":[{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138898167","name":"DMARC Report","url":"https://dmarcreport.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897474","name":"AutoSPF","url":"https://autospf.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897912","name":"Phish Protection","url":"https://www.phishprotection.com"}]},"mainEntityOfPage":{"@type":"WebPage","@id":"https://www.duocircle.com/blog/dns-vulnerabilities-major-threats-risks-and-how-to-reduce-exposure/"},"articleSection":"intermediate","keywords":"","image":{"@type":"ImageObject","url":"https://media.mailhop.org/duocircle/smtp-service-1258-1779877068497.jpg","caption":"DNS Vulnerabilities"},"speakable":{"@type":"SpeakableSpecification","cssSelector":[".answer-block","h1"]}} ```