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n2n/doc/Scratchpad.md

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n2n's Scratchpad

RPM Packaging

bash
./autogen.sh
./configure
make

cd packages/rpm
./configure
rpmbuild -bb ./n2n.spec

New Features between 2.0.x and 2.1.x

  • Better ming Windows build support.
  • Added -E flag to allow multicast ethernet traffic.

Draft changelog between 2.8 and 3.0 (as of September 27, 2021)

New Features

  • Federated supernodes to allow multiple supernodes for load balancing and fail-over (doc/Federation.md)
  • Automatic IP address assignment allows edges to draw IP addresses from the supernode (just skip -a)
  • Allowed community names can be restricted by regular expressions (community.list file)
  • Network filter for rules (-R) allowing and denying specific traffic to tunnel
  • Experimental TCP support (-S2) lets edges connect to the supernodes via TCP in case firewalls block UDP (not available on Windows yet)
  • All four supported ciphers offer integrated versions rendering OpenSSL dependency non-mandatory (optionally still available)
  • MAC and IP address spoofing prevention
  • Network interface metric can be set by command-line option -x (Windows only)
  • Re-enabled local peer detection by multicast on Windows
  • Edge identifier (-I) helps to identify edges more easily in management port output
  • Optionally bind edge to one local IP address only (extension to -p)
  • A preferred local socket can be advertised to other edges for better local peer-to-peer connections (-e)
  • Optional edge user and password authentication (-J, -P, doc/Authentication.md)
  • Optional json format at management port allows for machine-driven handling such as .html page generation (scripts/n2n-httpd) or script-based evaluation (scripts/n2n-ctl)
  • Completely overhauled build system including GitHub's action runners performing code syntax and formal checks, creating and running test builds, providing binairies and packages as artifacts and running verification tests

Improvements

  • Increased edges' resilience to temporary supernode failure
  • Fixed a compression-related memory leak
  • Ciphers partly come with platform-specific hardware acceleration
  • Added a test framework (tools/test-*.c and tests/)
  • Clean-up management port output
  • Polished benchmark tool output
  • Spun-off the name resolution into a separate thread avoiding lags
  • Added support for additional environment variables (N2N_COMMUNITY, N2N_PASSWORD, and N2N_FEDERATION)
  • Implemented new reload_communities command to make supernode hot-reload the -c provided community.list file, issued through management port
  • Reactivated send out of gratuitous ARP packet on establishing connection
  • Enhanced documentation (doc/ folder) including the man pages and command-line help text (-h and more detailed --help)
  • Self-monitoring time stamp accuracy for use on systems with less accurate clocks
  • Fixed man pages' and config files' paths
  • Code clean-up