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TrustpilotA WebRTC leak is when a website learns your real IP address through WebRTC, the browser technology behind video calls, even though the browser's normal traffic goes through a proxy. It happens because WebRTC gathers network addresses on its own, outside the proxy connection.
To set up a peer-to-peer call, WebRTC uses ICE to collect every address another peer might reach you on. These are called candidates: host candidates are your device's local addresses, and server-reflexive candidates are learned by asking a STUN server over UDP which public IP it sees.
That STUN request is the leak. Browser proxy settings cover web requests, and HTTP proxies carry TCP only, so the UDP request goes straight out of your real connection. The STUN server answers with your real public IP, and any page script can read the candidate with a few lines of JavaScript, without a permission prompt and without starting a call.
Current browsers hide local addresses behind random .local mDNS names, so the private IP leak of older browsers is mostly gone. The public IP leak through STUN remains unless WebRTC is restricted.
A site that sees one IP on the connection and another in the WebRTC candidates knows the visitor is behind a proxy, and it now has your real address as well. If you run separate browser profiles to manage your own accounts, that mismatch undoes the point of giving each profile its own IP. Test every new profile with the WebRTC leak test after you set up its proxy.
CleanProxies static ISP proxies give each browser profile its own dedicated US carrier IP that stays the same all month, and they plug into profile tools such as Multilogin with a host, port, username and password.
disable_non_proxied_udp, which makes WebRTC use the proxy or nothing. The other values, default, default_public_and_private_interfaces and default_public_interface_only, still let UDP leave outside the proxy.media.peerconnection.ice.proxy_only to true in about:config, or turn WebRTC off with media.peerconnection.enabled.The CleanProxies proxy that fits best here, with a $4.99 trial to test it first.
Dedicated IPs on US carrier ASNs with unlimited bandwidth and threads, never shared.
Dedicated static IPs registered to US and Canadian ISPs. The address stays the same for as long as you hold it, with unlimited bandwidth and HTTP(S) or SOCKS5 access.
Setup guides and best practices from the CleanProxies blog.
Shared vs dedicated ISP proxies explained: what each model means, what providers publish about sharing, when shared is enough, cost per successful request, and a tested Python script to audit your proxy list.
A step-by-step guide to testing proxy quality before you use it: connectivity, exit IP, ASN, blacklists, fraud score, speed and WebRTC/DNS leaks, with free tools, cURL commands and what good results look like.
Oxylabs' best rates need a $2,500/month enterprise plan. We priced five workloads on Oxylabs and five alternatives on 1 November 2026, with screenshots. CleanProxies ranks #1: dedicated US ISP proxies as low as $0.75/IP, residential from $0.63/GB that never expires.
Smartproxy is now Decodo. We priced the same workloads on Decodo and six alternatives on 1 November 2026, with screenshots. CleanProxies ranks #1: residential as low as $0.63/GB that never expires, US ISP proxies as low as $0.75/IP, mobile from $0.79/GB.
The best IPRoyal alternatives in 2026, compared on prices read from each provider's pricing page on 31 October with screenshots. CleanProxies ranks #1: residential as low as $0.63/GB that never expires, US ISP proxies as low as $0.75/IP with unlimited bandwidth, mobile from $0.79/GB.
A /24 subnet has 256 IPv4 addresses: 254 usable on a LAN, 251 in AWS or Azure, and 255 dedicated proxy IPs per block at CleanProxies. CIDR cheat sheet, Python examples and a tested script that audits your proxy list by /24.
Terms that come up alongside WebRTC leak.
Straight answers about WebRTC leak.
Not on its own. Browser proxy settings cover web requests, but WebRTC gathers addresses over UDP outside the proxy, so you also need to restrict WebRTC in the browser or profile.
