DNS Security & DNSSEC

Securing the Foundation of Your Digital Infrastructure

The Domain Name System serves as the internet's directory service, translating human-readable domain names into IP addresses. This critical infrastructure underpins every online interaction, making it an attractive target for attackers seeking to intercept traffic, redirect users, or exfiltrate data.

DNS security vulnerabilities enable attacks including cache poisoning that redirects legitimate queries to malicious servers, DNS hijacking that modifies records to capture traffic, and DNS tunneling that exfiltrates data through seemingly normal queries. Without proper protections, attackers can compromise your infrastructure without detection.

Webasto's DNS security services provide comprehensive protection through DNSSEC implementation, continuous monitoring for unauthorized changes, and advanced threat detection. We secure both your authoritative DNS infrastructure and protect your organization from malicious domains encountered during normal operations.

Understanding DNS Threats

DNS Cache Poisoning

Attackers inject fraudulent responses into DNS resolver caches, redirecting queries for legitimate domains to malicious servers. Users believe they are visiting authentic sites while actually connecting to attacker infrastructure. DNSSEC cryptographically signs DNS responses to prevent this manipulation.

DNS Hijacking

Unauthorized modification of DNS records redirects your domain traffic to attacker-controlled servers. This may occur through compromised registrar accounts, malicious insiders, or DNS server vulnerabilities. Continuous monitoring detects unauthorized changes within minutes.

DNS Tunneling

Attackers encode data within DNS queries to exfiltrate information or establish command channels that bypass traditional network controls. DNS traffic is often permitted through firewalls without inspection, making it attractive for covert communications.

DNS Amplification Attacks

Open DNS resolvers are exploited to amplify denial-of-service attacks, with small queries generating large responses directed at victim infrastructure. Proper DNS configuration prevents your infrastructure from participating in amplification.

DNSSEC Implementation

DNS Security Extensions add cryptographic authentication to DNS responses, enabling resolvers to verify that responses originate from authoritative sources and have not been modified in transit. DNSSEC is the foundation of modern DNS security.

Zone Signing

We configure DNSSEC signing for your authoritative zones, generating cryptographic keys and signing DNS records. Key management includes secure key storage, scheduled key rotation, and emergency re-signing procedures.

DS Record Management

Delegation Signer records establish trust chains between parent and child zones. We coordinate DS record publication with registrars and parent zone operators to ensure uninterrupted resolution during DNSSEC deployment and key rollovers.

Validation Configuration

Configure your recursive resolvers to validate DNSSEC signatures, rejecting spoofed or tampered responses. We assist with resolver deployment and policy configuration to enforce validation across your infrastructure.

DNS Monitoring and Protection

Record Change Detection

Continuous monitoring of your DNS records detects unauthorized modifications within minutes. Alerts trigger for changes to A, AAAA, MX, CNAME, NS, TXT, and other record types outside of approved maintenance windows.

DNS Query Analysis

Analysis of DNS query patterns identifies suspicious activity including tunneling attempts, data exfiltration, and queries for known malicious domains. Integration with protective DNS services blocks access to threat infrastructure.

Resolver Security

Assessment and hardening of your DNS resolver infrastructure prevents exploitation for amplification attacks and cache poisoning. We configure rate limiting, response validation, and access controls to protect resolver operations.

Protective DNS Services

Block access to known malicious domains at the DNS layer, preventing connections to phishing sites, malware distribution, and command and control infrastructure before network connections are established.

Threat Feed Integration

Our threat intelligence feeds containing millions of known malicious domains integrate with your DNS infrastructure to block queries for dangerous destinations.

Policy Enforcement

Define DNS policies by user group, device type, or network segment. Enforce acceptable use policies while allowing granular exceptions for business requirements.

Visibility and Reporting

Log and analyze DNS queries to identify suspicious patterns, policy violations, and potential security incidents. Dashboards visualize query trends and blocked threat categories.

Related Services

• Domain Monitoring detects threats targeting your domain infrastructure
• Domain Recovery assists with reclaiming hijacked domains
• DNS Lookup Tool analyzes DNS configuration and records