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HAProxy - Load balancer
278808915b
Accounting is implemented for half open connections which represent QUIC connections waiting for handshake completion. When reaching a certain limit, Retry mechanism is automatically activated prior to instantiate new connections. The issue with this behavior is that two notions are mixed : QUIC connection handshake phase and Retry which is mechanism against amplification attacks. As such, only peer address validation should be taken into account to activate Retry protection. This patch chooses to reduce the scope of half_open_conn. Now only connection waiting to validate the peer address are now accounted for. Most notably, connections instantiated with a validated Retry token check are not accounted. One impact of this patch is that it should prevent to activate Retry mechanism too early, in particular in case if multiple handshakes are too slow. Another limitation should be implemented to protect against this scenario. |
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The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - BRANCHES to understand the project's life cycle and what version to use - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)