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...It can carry application traffic through ICMP echo-style communication, which makes it distinct from common TCP, UDP, HTTP, or DNS tunnel tools. Because the tunnel traffic is not inherently presented as encrypted, sensitive usage should rely on secure protocols layered above it. pingtunnel is best understood as a specialized transport experiment for moving traffic through ICMP rather than a full privacy or security solution.

...The project provides both server and client behavior, allowing users to connect machines through a managed private network path. Its README notes that the project works, but also warns that it has not received thorough review and may hit performance limits above roughly 100 Mbps. Because of that, it is better understood as an educational or experimental VPN project than a first choice for production infrastructure. Its value comes from its readable design, minimalism, and focus on helping users understand VPN behavior without excessive complexity.