[PATCH] clarify how IgnoreUserKnownHosts works

[calestyo at scientia.net]

From: Christoph Anton Mitterer <mail at christoph.anton.mitterer.name>

Based on the previous documentation of the IgnoreUserKnownHosts directive, the
average user could easily think that the default value “no” is the more secure
choice (in the sense of “do not even check in ~/.ssh/known_hosts”).

• Clarify in sshd_config(5), that a value of “yes” in the IgnoreUserKnownHosts
  directive, makes sshd(8) only trust the global known hosts list (/etc/ssh/
  ssh_known_hosts).

Signed-off-by: Christoph Anton Mitterer <mail at christoph.anton.mitterer.name>
---
 sshd_config.5 | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sshd_config.5 b/sshd_config.5
index 43cc826..4ed3afc 100644
--- a/sshd_config.5
+++ b/sshd_config.5
@@ -627,7 +627,9 @@ should ignore the user's
 during
 .Cm RhostsRSAAuthentication
 or
-.Cm HostbasedAuthentication .
+.Cm HostbasedAuthentication
+and instead only trust the systemwide
+.Pa /etc/ssh/ssh_known_hosts .
 The default is
 .Dq no .
 .It Cm IPQoS
-- 
2.1.4