Blog
Guides and articles on networking, privacy and browser tools.
RFC 10023 Explained: The _for-sale DNS Record That Says a Domain Is Available
A new IETF convention lets a domain owner advertise that a name is for sale with a single TXT record — without parking the site. What the record looks like, how to publish and check one, and the traps to avoid.
How IP Fraud Scores Work: What the Number Means Before You Block Anyone
The signals behind an IP risk score — threat feeds, VPN and proxy detection, datacenter ASNs, crawlers — how they combine into one number, and what each risk band should actually trigger.
Email Reputation Explained: What MX, SPF and DMARC Reveal About Any Address
How to judge an email address from its domain alone: mail exchanger records, SPF and DMARC policies, disposable-provider lists and role accounts, and how they combine into a trust score.
What Can Someone Do With Your IP Address?
What your IP address really reveals about you, what it doesn't, and how websites use it for geolocation, security and fraud scoring.
DNS Propagation Explained: Why Your Domain Changes Take Time
Why DNS changes seem to take hours to show up, how TTL caching actually works, and how to check your records from dozens of locations at once.
How to Test Your Webcam Online Before Your Next Video Call
A quick guide to running an online webcam test in your browser, understanding camera permissions, and fixing the most common webcam problems.
How to Test Your Microphone Online (and Fix It When It Fails)
How browser microphone tests work, how to run an online mic test in seconds, and what to check when your microphone is not picking up sound.
How to Spot Disposable Email Addresses (and Why They Matter)
Why throwaway email addresses flood signup forms, the signals that give them away, and how to check any address with a free email checker.
WHOIS Lookups: What Domain and IP Records Actually Tell You
A practical guide to WHOIS: what domain and IP registration records contain, why so much is redacted now, and when a lookup is still the fastest answer.