HPN-SSH is a series of patched for the OpenSSH implementation of the SSH protocol. 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.

NOTE: The naming scheme for the patches has changed to help me automate the patch generation process. If you want all the features look for the file name "openssh-SSHVERSION-hpn-VERSION.diff"


  • Enhanced Performance for SSH
  • Multi-threaded AES-CTR cipher

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BSD License

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Intended Audience

System Administrators, End Users/Desktop, Security

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