8 ways it exposes everything you do online


Your VPN is probably leaking information without you knowing. From the domain names you visit to your real identity, if you use a VPN for privacy, you’re going to want to read this one.

Many people rely on VPNs for privacy, but most are unaware they often leak your DNS requests and don’t protect you from identification. Your browser is outside the control of your VPN, and it has a unique fingerprint. When cross-referenced with your login sessions, trackers profile your real identity across the web. That’s not to mention a tiny snippet of JavaScript on any website can unmask your real IP address. I’ll explain how and what you can do about it.

DNS leaks

DNS traffic that does not go through the VPN tunnel

How-To Geek's URL and DNS with a technology theme background

The Domain Name System (DNS) is what we all rely on behind the scenes to map domain names (e.g., example.com) to IP addresses. A DNS leak is when your system makes DNS requests outside the VPN’s encrypted tunnel. Since DNS is often unencrypted, any network snooper can profile your traffic.

A routing table determines where your computer sends traffic. VPN apps change them as best they can to push most of it through the VPN. However, they must allow traffic to your router, local devices, and the VPN service itself, which is often a source of problems. Your OS can also override these rules.

Common causes of DNS leaks (but keep in mind a decent VPN app should address these):

  • Router DNS proxy: Setting your nameserver to your router (aka gateway) can confuse your OS, and it may route DNS traffic outside the tunnel.
  • Teredo: (Disabled since Windows 10 v1803) May route IPv6-based DNS requests through third-party relays if your VPN doesn’t support IPv6.
  • No VPN-provided DNS service: causing your system to use the default, which could be your gateway.
  • DNS hijacking: Some security software (e.g., Avast) hijacks DNS and routes the traffic to custom DNS services, which may not go through the tunnel.
  • Smart Multi-Homed Name Resolution (SMHNR): On Windows, this sends every name-resolution protocol (including DNS) to all configured resolvers over every network interface, which includes the VPN and physical (normal) interfaces.

A network interface is how your computer connects to the outside world. A physical interface represents your real connection, and a virtual one represents the VPN.

Before reaching for solutions, test for DNS leaks. Ensure your DNS server is something you expect. You can also use an advanced tool like Wireshark to see if traffic on port 53 goes through the VPN interface.

Remember that a decent VPN app should address most of these problems.

The solutions:

  • Disable Teredo: It’s no longer needed.
  • Use the correct nameserver: If your VPN app doesn’t provide and configure one automatically, consider other options.
  • Disable SMHNR: You don’t need it.
  • Disable DNS hijacking features: Evaluate your security apps and look around their application settings.
  • Use a dedicated VPN gateway: A dedicated, separate system designed solely to route traffic through a VPN service. It should use an external firewall to restrict egress (outbound) packets to that service only. I use virtual machines on Qubes OS to achieve this, but it’s very technical.

I use and recommend Proton VPN, which has a decent app.

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Android and iOS

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IPv6 leak

If unsupported by the VPN service, IPv6 traffic may route elsewhere

Ethernet cables plugged into a Ubiquiti Flex Mini managed network switch.-2

IPv6 leaks are similar to DNS leaks—if your VPN doesn’t handle such connections, your operating system takes over and routes your traffic through the physical interface, exposing it.

There are a few solutions:

  • Prioritize IPv6 support: Use a VPN that explicitly supports IPv6 traffic and test it.
  • Disable IPv6: Disable it entirely on your system.
  • Firewall IPv6 traffic.

WebRTC leaks

Websites can stealthily unmask your identity

WebRTC can expose your real IP address, even if you’re behind a VPN. Any website can execute a small JS snippet to unmask you.

WebRTC is a group of technologies to enable peer-to-peer data transfers. PeerTube is one famous example.

To connect two peers, WebRTC enumerates every local interface—physical and virtual—and reads their IP addresses directly from the OS. It also sends packets to special servers (STUN servers) that reply with the public IP they see. The website hosting the script collects these and can easily identify you.


Man holding a phone with a VPN app showing 'Connected' status.


This is how they know you’re using a VPN

It’s not an invisibility cloak.

The solutions:

  • Disable WebRTC: You can do so in both Firefox and Chrome (via an extension).
  • Use a VPN gateway: Yes, it even catches WebRTC silliness.

Connection drops

Your system may continue to send unprotected packets

Smartphone illustration with red warning symbols indicating connection failure and network outage Credit: Lucas Gouveia/How-To Geek

If your VPN connection drops, your packets may default to the physical interface, which exposes your traffic.

The solutions:

  • Kill switch: VPN apps provide this feature to cut all network traffic if the VPN connection drops.
  • Firewall rules: Block all traffic on your physical interface that isn’t destined for your VPN service or local network.

Browser fingerprinting

Same identity across multiple IP addresses

A fingerprint is a measurement of your browser’s attributes, uniquely identifying you. It’s mathematically derived and highly effective.

They’re most often used in tracking scripts from Facebook, Google, etc., and they blanket the entire web. When you change your IP, Google knows it’s the same person, not just when you visit Google but also every website you visit.

The solutions:

  • Fingerprint randomization: Use a strong, privacy-focused browser that changes your fingerprint frequently. Brave is the only one that does it at present.
  • Block trackers: Browsers like Firefox and Brave have built-in tracker blockers; use them.
  • Different browsers: Separate your real-life login sessions from your everyday browsing. Companies like Facebook and Google link that fingerprint to who you are.

Authenticated sessions

Ties your real name to a fingerprint

Facebook from Meta loading screen on an Apple iPhone 14 Pro. Credit: Justin Duino / How-To Geek

Using a browser to log in to Facebook, TikTok, Google, etc., from multiple public IP addresses associates your fingerprint with your real identity. These companies track you across the web, and your cookies maintain a persistent identity on these domains. Essentially, they’ve got your fingerprint and real name.

The solutions:

  • Use dedicated VPN gateways: one for regular traffic, another for your real identity sessions.
  • Use network namespaces: On Linux, users can create an entirely separate network stack to isolate identities. Use different browsers, too.
  • Use incognito mode: As a last resort, run real-identity sessions in a private window, and before changing your public IP address, destroy the session by closing it. If you use Brave, it will change your fingerprint too.

Accidentally using clear text

Sending private information without a VPN correlates your identities

Several smartphones with an AI chip on the screen and one in the center with a chip that says 'Stop'. Credit: Lucas Gouveia/How-To Geek | Rennyks/Overearth/Shutterstock

 

Restoring a browser session with the VPN turned off, even if logged out of real-identity accounts, means signaling to trackers your fingerprint and real IP address. Trackers can then correlate that data with the browsing habits they’ve previously collected from you.

The solutions:

  • Vary tool use: Use different search engines and LLMs across real and virtual connections—that will prevent mistakes.
  • Use a VPN gateway or kill switch: Prevent traffic from occurring unless it’s through a VPN.
  • Be careful.

DNS profiling

The what, when, and how often you visit certain websites paint a unique picture

An illustration of encrypted DNS with a key and padlock icons connected to a block of encrypted text. Credit: Lucas Gouveia/How-To Geek

Your daily habits include the websites you visit, at what time, and frequency. Network operators—like ISPs—across the entire web can infer a unique pattern of behavior and use it to profile and track you across different public IP addresses.

The solutions:

  • Use the VPN-provided DNS server: This is the best solution, and it cloaks DNS requests entirely, but your VPN provider can (and some do) profile you.
  • Use DNS over HTTPS: Nobody can read your DNS requests except you and the DNS service (with a caveat below.)
  • Use DNSCrypt: This is my favorite because it provides anonymous DNS relays.

DNS traffic does not stop at the DNS service. These systems make further “upstream” requests, which are unencrypted and another potential source of tracking. DNSCrypt relays address this problem best by anonymizing the origin (you).


Google DNS open on Firefox.


Your DNS server knows every website you visit—here’s why Google’s 8.8.8.8 is different

8.8.8.8 offers more than just a simple alternative—there are potentially privacy benefits, too.


There are so many ways an OS can betray your privacy; the only sensible defense against leaks is a locked-down VPN gateway. I use one with an external firewall, which limits egress (outbound) packets to my VPN service, ensuring only VPN traffic leaves my system. Because the VPN gateway sits outside the host, no problematic internal factors will affect it. However, it’s not for everyone, and being careful is the next best thing.

Mullvad

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You want complete privacy? You can send Mullvad an envelope with cash and your payment token to pay for your account, so they’ll never have your personal information.




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Embodied Intelligence and the Phenomenology of AI explores how human cognition arises from perception, embodiment, and experience in contrast to disembodied artificial intelligence.

Conceptual diagram illustrating embodied intelligence and the phenomenology of AI through perception, embodiment, environment, and experience.

A Conscious Intelligence Perspective

The rapid development of artificial intelligence has transformed modern discussions about cognition and intelligence. Machine learning systems now recognize patterns in data, generate language, analyze images, and assist with complex decision-making processes across scientific, economic, and technological domains. These capabilities have led some observers to suggest that artificial systems may eventually replicate or even surpass human intelligence.

Yet beneath these technological achievements lies a fundamental philosophical question: what does it mean to be intelligent? While artificial intelligence can perform impressive computational tasks, human cognition emerges from a far more complex interaction between perception, embodiment, and lived experience. Understanding this distinction requires examining the concept of embodied intelligence—the idea that human cognition arises through the dynamic interaction between mind, body, and environment.

Phenomenology, the philosophical study of conscious experience, offers a powerful framework for understanding embodied intelligence. Rather than treating cognition as a purely abstract computational process, phenomenology emphasizes that perception, thought, and understanding occur within a lived world shaped by sensory experience and bodily engagement. When applied to contemporary discussions of artificial intelligence, this perspective reveals important differences between human cognition and machine intelligence.

Within the framework of Conscious Intelligence (CI), embodied intelligence highlights the experiential foundations of human awareness and interpretation. It underscores why human cognition remains essential in guiding technological systems, particularly as artificial intelligence continues to expand its capabilities.

Understanding Embodied Intelligence

The concept of embodied intelligence challenges traditional views of cognition that treat the mind as an abstract information-processing system. Early models of artificial intelligence often assumed that intelligence could be replicated through symbolic reasoning and computational logic. According to this perspective, cognition could be understood as the manipulation of symbols according to formal rules.

However, research in cognitive science and philosophy has increasingly shown that human intelligence cannot be separated from bodily experience. Perception, movement, and environmental interaction play fundamental roles in shaping how individuals understand the world (Varela, Thompson, & Rosch, 1991).

Embodied intelligence suggests that cognition arises through continuous engagement between the organism and its environment. Rather than operating as a detached reasoning system, the mind develops within the context of sensory perception and physical action.

Consider a simple example: observing a bird in flight. This experience involves more than visual pattern recognition. The observer’s body subtly adjusts posture, attention tracks motion through space, and prior experiences shape expectations about movement and behavior. The act of perception becomes an integrated process involving vision, spatial awareness, memory, and anticipation.

This dynamic interaction between perception and action forms the basis of embodied cognition. Intelligence emerges not from isolated computation but from the ongoing relationship between body and world.

Phenomenology and the Lived Body

Phenomenology provides a philosophical foundation for understanding embodied intelligence. While early phenomenologists such as Edmund Husserl explored the intentional structure of consciousness, later thinkers emphasized the central role of the body in shaping perception and cognition.

The French philosopher Maurice Merleau-Ponty argued that human consciousness is fundamentally embodied. In his influential work Phenomenology of Perception, he described the body as the primary site through which individuals encounter the world (Merleau-Ponty, 2012). Rather than functioning as an object separate from consciousness, the body becomes the medium through which experience unfolds.

According to Merleau-Ponty, perception is not merely the passive reception of sensory data. Instead, it is an active process in which the body engages with the environment through movement, orientation, and attention. The body provides a framework through which space, time, and meaning become intelligible.

This perspective challenges purely computational models of intelligence. Artificial systems may process visual data or recognize objects in images, but they do not experience the world through a lived body. They do not move within environments, feel spatial relationships, or engage with objects through physical interaction.

Phenomenology therefore highlights a crucial distinction between human cognition and artificial intelligence: human intelligence is grounded in embodied experience, while most AI systems operate within abstract computational environments.

The Limits of Disembodied Artificial Intelligence

Modern artificial intelligence systems excel at tasks involving pattern recognition and data analysis. Deep learning networks can identify faces in images, translate languages, and predict complex trends based on large datasets. These capabilities have created the impression that machine intelligence may soon approximate human cognition.

However, AI systems typically operate in disembodied informational spaces. They process data within computational architectures rather than through physical interaction with the world. Their “perception” consists of numerical representations rather than lived sensory experience.

Philosopher Hubert Dreyfus argued that early AI research underestimated the importance of embodied and contextual knowledge in human cognition (Dreyfus, 1992). Humans navigate the world through intuitive understanding shaped by years of bodily interaction with their environment. Much of this knowledge remains implicit rather than formally articulated.

For example, people can effortlessly grasp objects, maintain balance while walking, or recognize subtle emotional expressions in social interactions. These abilities arise from complex sensorimotor systems that integrate perception and action.

Replicating such capabilities in artificial systems has proven extraordinarily challenging. While robotics research has made significant progress, the embodied adaptability of biological organisms remains difficult to reproduce through purely computational methods.

This limitation suggests that human intelligence involves dimensions of cognition that extend beyond algorithmic processing. Embodied experience provides a context for understanding that cannot easily be reduced to data structures or symbolic reasoning.

Embodiment and Meaning

One of the most important implications of embodied intelligence concerns the nature of meaning. Human understanding emerges through interaction with environments that are experienced through the body.

Language, for example, is deeply connected to embodied experience. Words describing spatial relationships, movement, and sensation reflect how humans encounter the world physically. Even abstract concepts often originate from metaphors grounded in bodily perception.

Artificial intelligence systems can generate language that appears coherent and meaningful, yet they do not experience the embodied contexts that give language its significance. Large language models predict patterns in textual data without possessing an experiential understanding of the concepts they describe.

This distinction helps explain why AI systems sometimes produce outputs that appear plausible yet lack deeper comprehension. Without embodied experience, machines cannot anchor meaning in lived reality.

Phenomenology therefore emphasizes that understanding involves more than symbolic manipulation. Meaning arises from engagement with the world, shaped by perception, movement, and social interaction.

Embodied Intelligence in Human Practice

Embodied intelligence is visible in many aspects of human activity. Artists, athletes, musicians, and craftspeople rely heavily on forms of knowledge that cannot easily be articulated through formal rules. Their expertise develops through repeated interaction between perception and action.

In observational practices such as photography, for example, perception involves more than simply recording visual information. The observer anticipates movement, adjusts bodily orientation, and interprets environmental cues to capture meaningful moments. These processes occur through embodied awareness rather than through explicit calculation.

Scientific inquiry also involves embodied intelligence. Researchers conduct experiments, manipulate instruments, and interpret physical phenomena through sensory engagement with experimental environments. Knowledge emerges through interaction between theory, observation, and experience.

These examples illustrate how intelligence unfolds through embodied practice. Human cognition develops not only through abstract reasoning but also through lived engagement with the world.

Embodied Intelligence and Conscious Intelligence

Within the framework of Conscious Intelligence, embodiment plays a crucial role in shaping how individuals understand and guide technological systems. The CI model emphasizes three pillars—meta-awareness, interpretive agency, and responsible alignment—and embodied intelligence provides experiential grounding for each.

Meta-awareness involves reflecting on one’s own cognitive processes. Phenomenological reflection encourages individuals to examine how perception and bodily engagement influence understanding.

Interpretive agency arises from the human capacity to assign meaning to experiences. Embodied perception provides the contextual richness that allows individuals to interpret information within lived environments.

Responsible alignment involves directing technological capabilities toward ethical and constructive purposes. Embodied awareness can deepen ethical reflection by highlighting the real-world consequences of technological decisions for human experience.

By emphasizing embodiment, the CI framework reinforces the importance of human awareness in guiding artificial intelligence. Machines may extend computational capabilities, but human cognition provides the experiential perspective necessary to interpret and apply technological outputs responsibly.

Toward Embodied Artificial Intelligence

Recognizing the limitations of disembodied AI has led some researchers to explore the possibility of embodied artificial intelligence. Robotics and sensorimotor learning systems attempt to integrate perception and action within physical environments.

These approaches acknowledge that intelligence may require interaction with the world rather than purely abstract computation. Robots equipped with sensors and mobility can learn through environmental feedback, gradually developing adaptive behaviors.

While such research represents an important step toward more flexible AI systems, replicating the complexity of human embodiment remains a significant challenge. Biological organisms possess highly sophisticated sensory systems, neural architectures, and evolutionary adaptations that enable nuanced interactions with their surroundings.

Nevertheless, the exploration of embodied AI highlights an important philosophical insight: intelligence may be inseparable from the environments in which it develops.

Embodied Intelligence in a Technological Civilization

As artificial intelligence becomes increasingly integrated into modern societies, understanding embodied intelligence becomes more important than ever. Digital technologies shape how individuals perceive information, communicate with others, and interact with the world.

Yet human cognition continues to depend on embodied experience. Perception, movement, and sensory engagement remain essential components of understanding.

The rise of AI therefore does not eliminate the importance of human intelligence. Instead, it emphasizes the need for conscious awareness capable of interpreting technological systems within lived contexts.

Embodied intelligence reminds us that cognition is not simply an abstract computational function. It is an activity embedded in perception, experience, and interaction with the world.

Conclusion

The concept of embodied intelligence reveals a fundamental dimension of human cognition often overlooked in discussions of artificial intelligence. While machines excel at processing data and recognizing patterns, human intelligence arises through the dynamic interaction between mind, body, and environment.

Phenomenology provides a philosophical framework for understanding this relationship by examining the structures of lived experience. Through the work of thinkers such as Merleau-Ponty, phenomenology shows that perception and understanding emerge from embodied engagement with the world.

In the age of artificial intelligence, this perspective becomes increasingly relevant. AI systems may extend human analytical capabilities, but they remain fundamentally different from human cognition, which is grounded in embodied experience.

Within the framework of Conscious Intelligence, embodied intelligence underscores the importance of human awareness in guiding technological systems. By integrating reflection, interpretation, and responsibility, individuals can ensure that artificial intelligence serves constructive purposes within human societies.

Ultimately, understanding intelligence requires acknowledging the role of the body in shaping perception and meaning. Human awareness remains rooted in lived experience, and this experiential foundation continues to guide the evolving relationship between human cognition and artificial intelligence.

References

Dreyfus, H. L. (1992). What computers still can’t do: A critique of artificial reason. MIT Press.

Merleau-Ponty, M. (2012). Phenomenology of perception. Routledge. (Original work published 1945)

Varela, F. J., Thompson, E., & Rosch, E. (1991). The embodied mind: Cognitive science and human experience. MIT Press.



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