Web manual pages are available from OpenBSD for the following commands. These manual pages reflect the latest development release of OpenSSH. ssh (1) — The basic rlogin/rsh-like client program sshd (8) — The daemon that permits you to log in ssh_config (5) — The client configuration file sshd_config (5) — The daemon configuration file

Remote operations are done using ssh, scp, and sftp. Key management with ssh-add, ssh-keysign, ssh-keyscan, and ssh-keygen. The service side consists of sshd, sftp-server, and ssh-agent.

Normal OpenSSH development produces a very small, secure, and easy to maintain version for the OpenBSD project. The OpenSSH Portability Team takes that pure version and adds portability code so that OpenSSH can run on many other operating systems. (Unfortunately, in particular since OpenSSH does authentication, it runs into a *lot* of differences between Unix operating …

A mismatch between the client and server during authentication will cause authentication to fail, despite it appearing to be configured. For example, an ssh-dss user key may be listed in .ssh/authorized_keys but may not pass authentication because, …

Mar 6, 2000 · need the following patch: https://ftp.openbsd.org/pub/OpenBSD/OpenSSH/openbsd70_9.1.patch # cd /usr/src/usr.bin # tar zxvf .../openssh-9.1.tar.gz # cd ssh # patch < /path/to/openbsd70_9.1.patch # if on OpenBSD 7.0 or 6.9 # make obj # make cleandir # make depend # make # make install # cp ssh_config …

* scp(1): when recursively transferring files in SFTP mode, create the destination directory if it doesn't already exist to match scp(1) in legacy RCP mode behaviour. * scp(1): many improvements in error message consistency between scp(1) in SFTP mode vs legacy RCP mode. * sshd(8): fix potential race in SIGTERM handling PR#289

The focus of this release is bug fixing. New Features ------------ * sshd(8): make IgnoreRhosts a tri-state option: "yes" to ignore rhosts/shosts, "no" allow rhosts/shosts or (new) "shosts-only" to allow .shosts files but not .rhosts. * sshd(8): allow the IgnoreRhosts directive to appear anywhere in a sshd_config, not just before any Match ...

* ssh(1): the ssh_config "Include" directive can now expand environment as well as the same set of %-tokens "Match Exec" supports. * sshd(8): add a sshd_config "RefuseConnection" option that, if set will terminate the connection at the first authentication request. * sshd(8): add a "refuseconnection" penalty class to sshd_config

disabling re-execution of sshd(8) has been removed. Further separation of sshd-session into additional, minimal binaries is planned for the future. * sshd(8): several log messages have changed. In particular, some log messages will be tagged with as originating from a process named "sshd-session" rather than "sshd".

SSH protocol version 2 Core RFCs secsh working groupthe OpenSSH specifications page