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12 results for "DNS leak"
- Article
DNS leaks explained: what they are, why they matter, and how to fix them
A DNS leak quietly tells your ISP everywhere you're going on the internet — even when you're using a VPN. Here's what causes them, how to test for one, and how to plug the leak.
/blog/dns-leak-explained
- Tool
DNS Leak Test
Detect DNS queries leaking outside your VPN.
/tools/dns-leak-test
- Article
What is mDNS / Bonjour? Local network discovery explained
Your printer just appears on your network. Your AirPods reconnect automatically. Chromecast finds your TV. The reason all of that 'just works' is mDNS — multicast DNS, the silent infrastructure of local networks.
/blog/what-is-mdns-bonjour
- Article
Reverse DNS lookup explained: what PTR records are and why they matter
A reverse DNS lookup turns an IP address back into a hostname. Here's how the PTR record system works, when it matters (a lot for email; rarely for users), and how to test your own reverse DNS.
/blog/reverse-dns-lookup-explained
- Article
How does DNS work? A friendly walkthrough
Type a domain, see a website. In between, DNS does a quiet 50-millisecond dance through several specialized servers. Here's exactly how every name turns into an IP.
/blog/how-does-dns-work
- Article
Best free public DNS servers in 2026
Your ISP's DNS is fine, but public DNS servers like Cloudflare 1.1.1.1, Google 8.8.8.8, and Quad9 9.9.9.9 are usually faster, more private, and easier to remember. Here's how they compare.
/blog/best-free-public-dns-servers
- Article
How CDNs work: the invisible layer that makes the web fast
Most popular sites are served by a Content Delivery Network — a global cache layer between you and the origin server. Here's what CDNs actually do, why they speed up the internet, and how the major ones differ.
/blog/how-cdns-work
- Tool
WebRTC Leak Test
Find IPs leaking through WebRTC in your browser.
/tools/webrtc-leak-test
- Article
What is a load balancer? Plain-English guide to scaling traffic
When one server can't handle the traffic, you put a load balancer in front of many. Here's how load balancers work, what algorithms they use, and where they fit alongside CDNs and DNS.
/blog/what-is-a-load-balancer
- Article
Anycast explained: how the same IP is in 200+ places at once
When you query 1.1.1.1, dozens of physical servers around the world could answer — and the right one always does. That trick is called anycast, and it underpins modern DNS, CDNs, and DDoS protection.
/blog/anycast-explained
- Tool
Blacklist Check
Check if an IP is on common DNSBL spam lists.
/tools/blacklist-check
- Article
How does email actually work? The protocols behind every message
Email is older than the web and built on protocols most people have never heard of: SMTP, IMAP, MX records, SPF, DKIM, DMARC. Here's the whole journey from 'send' to 'inbox' in plain English.
/blog/how-does-email-actually-work