Privacy
Canvas Fingerprinting Explained
Canvas fingerprinting exploits tiny, consistent rendering differences between devices — a specific, well-studied fingerprinting technique with known browser-level defenses available.
Network Privacy, IP & Security Guides
Practical explanations and diagnostic steps for IP reputation, VPN and proxy risks, DNS, WebRTC, IPv6 and safer internet connections.
Browse by topic
Categories
Fresh, practical answers
136 articlesLatest Guides
Network Security
Proxy Detection in Web Security
Proxy detection is most valuable in a security context when connected to request context, account history and abuse patterns — not treated as an isolated flag demanding an automatic response.
IP Reputation
VPN IP Reputation: Shared Exit, Shared Consequences
A VPN exit address's reputation reflects the combined history of every customer who has recently shared it — which is why a completely innocent VPN user can inherit a flagged score.
Proxy
Anonymous Proxies and the Headers They Leave Behind
Anonymity labels on proxy services are informal marketing terms — the only reliable way to know what a proxy actually reveals is to test its real behavior directly.
DNS
DNS over TLS: A Dedicated Encrypted Resolver Channel
DNS over TLS uses a dedicated port for encrypted DNS traffic rather than disguising it as web traffic — a different deployment model than DNS over HTTPS with its own tradeoffs.
WebRTC
Firefox WebRTC Leak Checks
Firefox offers more direct, built-in privacy controls over WebRTC than some other browsers — testing first clarifies whether you actually need to use them.
IPv6
IPv6 Privacy Addresses: Helpful but Not Invisible
IPv6 privacy addresses rotate a device's interface identifier over time — a genuine tracking mitigation, but one that doesn't touch the network prefix, which can still reveal your general network and location.
Privacy
How IP Tracking Works Across Visits
IP-based tracking links visits through a shared or repeated address — but shared addresses, address changes, and correlation with other signals all limit how confidently an IP alone can identify one specific person.
Network Security
ASN Risk: Network Context at Internet Scale
ASN-level risk signals help triage traffic efficiently at internet scale, but a single ASN can span both entirely legitimate and abusive users — network-level context is a starting point for investigation, not a conclusion.
AI Access
Claude Account Access Problems: Network or Account?
Cross-device and cross-network checks are the fastest way to separate a network-level access issue from an account-level one — each points toward a different fix.
IP Address
Why Does My IP Location Show the Wrong City?
A wrong IP location almost always traces back to one of a handful of causes — stale provider databases, ISP gateway routing, a VPN, or mobile carrier networking — each with a different, checkable fix.
IP Reputation
Proxy IP Reputation: Why Source and Usage Both Matter
Both where a proxy address comes from and how heavily it's shared shape its reputation — a residential proxy and a datacenter proxy can carry very different risk profiles for the exact same use case.