DNS Protocol Skill
Expert skill for DNS protocol implementation, server configuration, and DNS-based service discovery.
Capabilities
- DNS Query Execution: Execute dig/nslookup queries and interpret results comprehensively
- Record Type Analysis: Work with all DNS record types (A, AAAA, CNAME, MX, TXT, SRV, NS, SOA, PTR)
- DNS Server Configuration: Configure BIND, CoreDNS, and other DNS servers
- DNSSEC Implementation: Implement and validate DNSSEC signing and verification
- DNS Traffic Analysis: Analyze DNS traffic patterns and detect anomalies
- Service Discovery: Design DNS-based service discovery (SRV records, DNS-SD)
- Zone Management: Manage DNS zones, transfers, and delegation
- TTL Optimization: Optimize TTL values for different use cases
Tools and Dependencies
dig- DNS lookup utilitynslookup- Query DNS serversBIND- Berkeley Internet Name DomainCoreDNS- Cloud-native DNS serverdnssec-tools- DNSSEC utilitiestcpdump- DNS traffic capture
Target Processes
- realtime-messaging-system.js (service discovery)
- layer7-load-balancer.js (DNS-based routing)
- http-proxy-server.js (DNS resolution)
Usage Examples
Comprehensive DNS Query
dig +trace +all example.com
dig @8.8.8.8 example.com ANY
SRV Record Lookup
dig _http._tcp.example.com SRV
DNSSEC Validation
dig +dnssec +multi example.com
delv @8.8.8.8 example.com +rtrace
Zone Transfer Test
dig @ns1.example.com example.com AXFR
Quality Gates
- DNS resolution verification
- Record propagation testing
- DNSSEC chain validation
- Response time benchmarking
- Zone configuration validation