OpenSSH 9.8 💾

OpenSSH is a BSD/Linux implementation of SSH1 and SSH2 for encrypted terminal connections, tunneling and file transfers. It includes the sshd server, scp and sftp, and various utility tools such as ssh-add, ssh-agent, ssh-keysign, ssh-keyscan, ssh-keygen, and the sftp-server.

minor feature: This release contains mostly. New features. Sshd(8): as described above, sshd(8) will now penalise client. Addresses that, for various reasons, do not successfully complete Authentication. This feature is controlled by a new sshd_config(5) PerSourcePenalties option and is on by default. Sshd(8) will now identify situations where the session did not. Authenticate as expected. These conditions include when the client Repeatedly attempted authentication unsucessfully (possibly Indicating an attack against one or more accounts, e.g. password Guessing), or when client behaviour caused sshd to crash (possibly Indicating attempts to exploit in sshd). When such a condition is observed, sshd will record a penalty of. Some duration (e.g. 30 seconds) against the client's address. If This time is above a minimum configurable threshold, then all Connections from the client address will be refused (along with any Others in the same PerSourceNetBlockSize CIDR range) until the Penalty expire. Repeated offenses by the same client address will accrue greater. Penalties, up to a configurable maximum. Address ranges may be Fully exempted from penalties, e.g. to guarantee access from a set of trusted management addresses, using the new sshd_config(5) PerSourcePenaltyExemptList option. We hope these options will make it significantly more difficult for. Attackers to find accounts with weak/guessable passwords or exploit in sshd(8) itself. This option is enabled by default. Ssh(8): allow the HostkeyAlgorithms directive to disable the. Implicit fallback from certificate host key to plain host keys. Misc: a number of inaccuracies in the PROTOCOL.*. Documentation files. GHPR430 GHPR487 All: switch to strtonum(3) for more robust integer parsing in most. Places. Ssh(1), sshd(8): correctly restore sigprocmask around ppoll(). Ssh-keysign(8): stricter validation of messaging socket fd GHPR492. Sftp(1): flush stdout after writing "sftp " prompt when not using. Editline. GHPR480 Sftp-server(8): hom

BSDL c ssh security cryptography utilities sftp scp openbsd linux


denyhost 3.1

DenyHost works to automatically block brute-force attacks against the secure shell service. It does this by scanning log files for failed login attempts and blocking remote hosts which have made too many failed connections.