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boringproxy vs NATMap: catalog facts
boringproxy	NATMap
Free Free and open source under the MIT licence.	Free Free and open source under the MIT licence.
Windows, Linux, Self-hosted	Windows, Linux, Command line
Automatic HTTPS certificates Web UI for managing tunnels	Exposes internal TCP and UDP services without a relay server Bind mode keeps traffic out of the program
Last code change was in 2024 Needs a server with a public address	Only works when every NAT layer is full cone No published release binaries in the repository
Downloadable app, Self-hosted	Downloadable app
Open source	Open source
License: MIT	License: MIT
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.