diff options
| author | Damien Miller <djm@cvs.openbsd.org> | 2024-09-15 01:18:27 +0000 |
|---|---|---|
| committer | Damien Miller <djm@cvs.openbsd.org> | 2024-09-15 01:18:27 +0000 |
| commit | e25559b0ccc55b9bb210bd527af0ba97c6e806d4 (patch) | |
| tree | 4a0d24c45a411725f5217a112817b2bf52caa94f /usr.bin/ssh/sshd_config.5 | |
| parent | dc82febabdae335a2c2e0c890a3dbd4f3e6d4298 (diff) | |
add a "Match invalid-user" predicate to sshd_config Match options.
This allows writing Match conditions that trigger for invalid username.
E.g.
PerSourcePenalties refuseconnection:90s
Match invalid-user
RefuseConnection yes
Will effectively penalise bots try to guess passwords for bogus accounts,
at the cost of implicitly revealing which accounts are invalid.
feedback markus@
Diffstat (limited to 'usr.bin/ssh/sshd_config.5')
| -rw-r--r-- | usr.bin/ssh/sshd_config.5 | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/usr.bin/ssh/sshd_config.5 b/usr.bin/ssh/sshd_config.5 index 7d290853da0..3078dfe3e0f 100644 --- a/usr.bin/ssh/sshd_config.5 +++ b/usr.bin/ssh/sshd_config.5 @@ -33,7 +33,7 @@ .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" -.\" $OpenBSD: sshd_config.5,v 1.372 2024/09/15 01:11:26 djm Exp $ +.\" $OpenBSD: sshd_config.5,v 1.373 2024/09/15 01:18:26 djm Exp $ .Dd $Mdocdate: September 15 2024 $ .Dt SSHD_CONFIG 5 .Os @@ -1238,9 +1238,11 @@ applied. .Pp The arguments to .Cm Match -are one or more criteria-pattern pairs or the single token -.Cm All -which matches all criteria. +are one or more criteria-pattern pairs or one of the single token criteria: +.Cm All , +which matches all criteria, or +.Cm Invalid-User , +which matches when the requested user-name does not match any known account. The available criteria are .Cm User , .Cm Group , |