HPN-SSH

HPN-SSH is a series of performance patches for OpenSSH. By addressing network limitations and CPU limitations significant throughput performance can be realized. Gains of close to two orders of magnitude are possible on long fat network paths.

A new official git repo is now available at http://github.com/rapier1/openssh-portable. This repo will be the source of all the patches found on this page starting with OpenSSH 6.7 We encourage anyone interested to grab the repo and submit fixes and features.

New in v14.15! The number of cores used by the AES CTR multithreaded cipher is now based on the number of available CPU cores. On all platforms the cipher will spawn at least 4 threads. However, on systems with more than 4 cores additional threads will be generated for each pair of additional cores.