# 2FA, IP & Browser Privacy Guides | 2FAOrbit

> Practical guides to TOTP codes, QR setup, public and private IPs, WebRTC findings and DNS resolver tests.

Canonical: https://2faorbit.online/guides/
Language: en

[Home](https://2faorbit.online/)/GuidesA LITTLE CLARITY

# Know your next step.

Practical help for authentication and your browser connection.

[IP ADDRESSESPublic vs private IP addresses: what an IP lookup showsUnderstand public, private, shared and reserved addresses, what IP location means, and how to inspect your connection.4 min read ](https://2faorbit.online/guides/public-vs-private-ip/)[BROWSER PRIVACYHow to read a WebRTC test: public, local and mDNS candidatesRead public and local WebRTC candidates, understand mDNS names and inconclusive tests, and compare findings with your expected connection.4 min read ](https://2faorbit.online/guides/webrtc-test-results/)[DNS PRIVACYHow to read a DNS-leak test and compare resolver providersLearn what a browser DNS-leak test observes, how standard and extended checks differ, and how to compare resolver providers with your expected setup.4 min read ](https://2faorbit.online/guides/dns-leak-test-results/)[THE BASICSWhat is TOTP? Meaning, codes and the 30-second timerUnderstand what a TOTP code is, how the timer works, and the difference between your setup key and the code you enter at sign-in.3 min read ](https://2faorbit.online/guides/what-is-totp/)[TROUBLESHOOTINGTOTP code not working? Check these five thingsFix a rejected authenticator code by checking the account, device clock, setup key, code settings and refresh timing.4 min read ](https://2faorbit.online/guides/totp-code-not-working/)[GETTING STARTEDWhere to find your authenticator setup keyFind the manual setup key in a service’s 2FA settings, understand QR setup links, and load them into your authenticator.3 min read ](https://2faorbit.online/guides/authenticator-setup-key/)[HOW IT WORKSTOTP vs HOTP: time-based and counter-based codesCompare TOTP and HOTP authentication codes, what makes them change, and which setup links 2FAOrbit supports.2 min read ](https://2faorbit.online/guides/totp-vs-hotp/)

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