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# n2n's Scratchpad
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## RPM Packaging
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```
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bash
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./autogen.sh
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./configure
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make
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cd packages/rpm
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./configure
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rpmbuild -bb ./n2n.spec
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```
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## New Features between 2.0.x and 2.1.x
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- Better ming Windows build support.
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- Added `-E` flag to allow multicast ethernet traffic.
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## Draft changelog between 2.8 and 3.0 (as of September 27, 2021)
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### New Features
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- Federated supernodes to allow multiple supernodes for load balancing and fail-over (`doc/Federation.md`)
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- Automatic IP address assignment allows edges to draw IP addresses from the supernode (just skip `-a`)
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- Allowed community names can be restricted by regular expressions (`community.list` file)
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- Network filter for rules (`-R`) allowing and denying specific traffic to tunnel
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- Experimental TCP support (`-S2`) lets edges connect to the supernodes via TCP in case firewalls block UDP (not available on Windows yet)
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- All four supported ciphers offer integrated versions rendering OpenSSL dependency non-mandatory (optionally still available)
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- MAC and IP address spoofing prevention
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- Network interface metric can be set by command-line option `-x` (Windows only)
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- Re-enabled local peer detection by multicast on Windows
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- Edge identifier (`-I`) helps to identify edges more easily in management port output
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- Optionally bind edge to one local IP address only (extension to `-p`)
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- A preferred local socket can be advertised to other edges for better local peer-to-peer connections (`-e`)
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- Optional edge user and password authentication (`-J`, `-P`, `doc/Authentication.md`)
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### Improvements
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- Increased edges' resilience to temporary supernode failure
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- Fixed a compression-related memory leak
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- Ciphers partly come with platform-specific hardware acceleration
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- Added a test framework (`tools/test-*.c` and `tests/`)
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- Clean-up management port output
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- Polished benchmark tool output
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- Spun-off the name resolution into a separate thread avoiding lags
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- Added support for additional environment variables (`N2N_COMMUNITY`, `N2N_PASSWORD`, and `N2N_FEDERATION`)
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- Implemented new `reload_communities` command to make supernode hot-reload the `-c` provided `community.list` file, issued through management port
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- Reactivated send out of gratuitous ARP packet on establishing connection
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- Enhanced documentation (`doc/` folder) including the man pages and command-line help text (`-h` and more detailed `--help`)
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- Self-monitoring time stamp accuracy for use on systems with less accurate clocks
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- Fixed man pages' and config files' paths
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- Code clean-up
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