Detect VPN & Proxy Usage are popular tools for online users to mask their identities and access restricted content. They also can be used for more nefarious activities such as account takeovers and cyberattacks. For website operators, identifying VPN users effectively is critical to maintaining cybersecurity and mitigating potential risks.
One way to identify VPN and proxy usage is by examining the user’s DNS queries. VPNs and proxies often use distinct DNS servers which can be identified and flagged using this detection method. DNS-based detection is typically more effective than IP-based detection and can be combined with other methods for improved accuracy.
Detect VPN & Proxy Usage: Unmask Hidden Online Identities
Other ways to detect VPN and proxy usage include analyzing traffic patterns (e.g. a user’s behavior suggesting they are visiting the same sites repeatedly) and the geolocation of the user’s IP address. A sudden shift in location may be an indication of a proxy or VPN connection. Traffic patterns can be further analyzed using techniques such as WebRTC and JavaScript.
Port scanning involves actively probing a user’s device for open network ports, which can reveal the presence of a VPN or proxy service. However, this method raises serious privacy concerns as it requires the use of intrusive and potentially damaging software on a user’s device without their explicit consent. Furthermore, port scanning can lead to inaccurate detection results as these open ports can be configured for legitimate reasons unrelated to VPNs or proxies.…