When DNS queries go through your ISP instead of the proxy or VPN — and websites see your real region.

How do I reduce the risk of a leak?

Use a proxy or VPN with DNS protection, disable or restrict WebRTC in the browser, turn off unused IPv6 and repeat the test.

Does a proxy hide DNS?

Not always: some setups hide the IP but not DNS queries. That is why you need the test.

What is a WebRTC leak?

Through WebRTC the browser can reveal your real IP to a website even when working through a proxy.

Do I need to disable WebRTC completely?

Not necessarily. WebRTC is needed for calls in the browser — it is enough to restrict it or enable spoofing in an antidetect browser.

I use a public DNS — is that a leak?

The test shows the public DNS node that answered the query — usually the one nearest to where the query came from. If with the proxy connected the node is near you rather than in the proxy country, DNS bypasses the proxy.

IP and DNS Leak Test

Find out whether your connection exposes your real address: which DNS servers see your queries and whether WebRTC or IPv6 leak through your proxy or VPN.

Your IP address

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Check result

What the DNS Leak Test shows

A short note on every field of the result. Details are in the sections below.

DNS servers

Who handles your DNS queries

WebRTC

Whether WebRTC exposes your real IP

IPv6

Whether traffic bypasses the proxy over IPv6

Your IP

The address websites see

DNS and IP country

Whether they match

Multiple queries

The test sends several DNS queries for accuracy

What is a DNS leak test

The test shows which DNS servers see your queries and checks WebRTC and IPv6 leaks. If the DNS server belongs to your ISP, websites see your real region even though your IP has changed.

How to run the DNS leak test

1
Connect the proxy or VPN the same way you do for work.
2
Click “Run test”.
3
See the result: DNS servers, WebRTC and IPv6.
4
If a leak is found, fix the settings and run the test again.

For accuracy the test sends several DNS queries — so every server they pass through is visible.

What is a DNS leak

When you open a website, the browser first looks up its IP through a DNS server. If the proxy is set for web traffic only, DNS queries may go directly — through your ISP DNS servers.

The website sees the proxy IP, while the DNS server sees your ISP in your country. That is the leak: your region and provider are exposed even though the IP has changed.

Which leaks the test finds

Leak	How it happens	Risk
DNS	DNS queries go through your ISP, not the proxy	Your provider and region are visible
WebRTC	The browser reports connection addresses to the website via WebRTC	Your real IP may be visible
IPv6	The proxy works over IPv4 while IPv6 traffic goes directly	IPv6 websites see your real address
DNS and IP country	DNS servers are in one country, the IP in another	Websites notice the mismatch

DNS test: how to read the result

Result	Meaning
Your ISP DNS servers	A leak: DNS queries bypass the proxy
DNS servers in the proxy country or public DNS	No leak
WebRTC shows your real IP	A browser leak
WebRTC shows the proxy IP or nothing	No leak
An ISP IPv6 address with the proxy connected	An IPv6 leak

How to fix a DNS leak

DNS

Use SOCKS5 with remote name resolution: in Firefox enable “Proxy DNS when using SOCKS v5”, in curl use socks5h://.
In an antidetect browser make sure the proxy is set in the profile, not only in the system.
If you use a VPN, enable its DNS leak protection.

WebRTC

In an antidetect browser enable WebRTC spoofing to the proxy IP.
In a regular browser restrict WebRTC in the settings or with an extension.

IPv6

If the proxy works over IPv4 only, disable IPv6 in the network settings while working through the proxy.

When to check for DNS leaks

After connecting a new proxy or VPN.
Before working in a new antidetect browser profile.
After a browser or system update.
If websites show the wrong country or ask for extra verification.

Proxies without mismatches

To make the IP, DNS and time zone match, take proxies in the country you need and set up the profile for it. PSB has 90M+ IPs in 195 countries: residential from $0.60/GB, mobile from $1.50/GB, static ISP $2 per IP a month.

Use cases