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In recent versions, with "LogLevel INFO", the following is logged:
Connection closed by 172.16.0.1 [preauth]
But setting "LogLevel VERBOSE" gives this:
Connection from 172.16.0.1 port 42049 on 172.16.0.2 port 22
Failed publickey for simon from 172.16.0.1 port 42049 ssh2: RSA
ab:cd:ef:00:11:2
The bug is still present in Trusty using openssh version 6.5p1-6
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https://bugs.launchpad.net/bugs/501956
Title:
OpenSSH does not log failed attempts when key authentic
** Branch linked: lp:~kees/openssh/report-publickey
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https://bugs.launchpad.net/bugs/501956
Title:
OpenSSH does not log failed attempts when key authentication is used
To summarize:
LogLevel INFO
RSAAuthentication yes
PubkeyAuthentication yes
HostbasedAthentication no
ChallengeResponseAuthentication no
PasswordAuthentication no
AllowUsers lukeskywalker
[1] The decision to log the error is made in procedure "auth_log" in "auth.c":
/* Raise logging level */
auth_log in auth.c is not changing the error logging function from
"authlog" to "logit" for this type of error (line 258). If you use "sshd
start -dd" you will get the failed attempt clearly on the screen but NOT
in auth.log.
NB. Setting LogLevel to VERBOSE does show the failed attempts quite well
** Bug watch added: OpenSSH Portable Bugzilla #974
https://bugzilla.mindrot.org/show_bug.cgi?id=974
** Also affects: openssh via
https://bugzilla.mindrot.org/show_bug.cgi?id=974
Importance: Unknown
Status: Unknown
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OpenSSH does not log failed attempts when key authentication is
** Changed in: openssh (Ubuntu)
Status: New => Confirmed
** Changed in: openssh (Ubuntu)
Importance: Undecided => Medium
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OpenSSH does not log failed attempts when key authentication is used
https://bugs.launchpad.net/bugs/501956
You received this bug notification because you are a m
