Every VPS admin needs to understand these DNS records: A records point domains to IPv4 addresses. AAAA records point to IPv6. CNAME records create aliases (www pointing to the root domain). MX records direct email to mail servers. TXT records hold SPF, DKIM, and DMARC data for email authentication. CAA records control which certificate authorities can issue SSL for your domain. Getting these right is fundamental to your VPS services working correctly.
Understanding DNS Record Types
Every VPS admin needs to understand these DNS records: A records point domains to IPv4 addresses. AAAA records point to IPv6. CNAME records create aliases (www pointing to the root domain). MX records direct email to mail servers. TXT records hold SPF, DKIM, and DMARC data for email authentication. CAA records control which certificate authorities can issue SSL for your domain. Getting these right is fundamental to your VPS services working correctly.
TTL Optimization Strategies
TTL (Time To Live) controls how long DNS resolvers cache your records. High TTL (86400 seconds / 24 hours) reduces DNS queries but makes changes slow to propagate. Low TTL (300 seconds / 5 minutes) allows quick changes but increases DNS load. Best practice: use high TTLs for stable records, lower TTLs temporarily before planned migrations or IP changes. Before switching VPS providers, reduce TTL to 300 seconds 48 hours in advance so the change propagates quickly when you update the A record.
DNS Failover and Redundancy
Use a managed DNS provider (Cloudflare, Route 53) rather than self-hosting DNS on your VPS — if your VPS goes down, your DNS goes down too, preventing any failover. Configure health checks to automatically update DNS when your server is unreachable. Use multiple A records for round-robin load distribution. Velox Media’s custom solutions for demanding workloads pairs well with Cloudflare’s DNS for comprehensive protection and intelligent routing.
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