WebRTC

WebRTC (Web Real-Time Communication) is an abbreviation for Web Real-Time Communication. It is both an API and a protocol. This technology enables web applications and sites to capture and selectively transmit audio or video media, and directly exchange arbitrary data between browsers without intermediaries. Through a series of WebRTC standards, users can achieve peer-to-peer data sharing and teleconferencing without installing plugins or any third-party software.

WebRTC obtains the user's real IP address via STUN or TURN servers to establish a peer-to-peer connection. Even if you use a proxy, your real local IP and public IP may still be leaked.

CosLogin client provides four WebRTC modes to help prevent your real IP from being detected:

  • Replace: Enable WebRTC to replace the public IP with a proxy IP, while masking the local IP.
  • Private: Enable WebRTC but disable IP retrieval.
  • Allow: Enable WebRTC to use the real IP of current computer.
  • Disable: When WebRTC is turned off, the website will detect that you've turned off WebRTC.

Steps:

  1. Click the Create Browser button on the main client interface.
  2. In the profile configuration panel > Fingerprint > WebRTC.

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Last modified: 2026-06-11