https://bugzilla.mindrot.org/show_bug.cgi?id=2461
Bug ID: 2461
Summary: Source IP missing in log when no suitable key exchange
method found
Product: Portable OpenSSH
Version: 6.0p1
Hardware: Other
OS: Linux
Status: NEW
Severity: normal
Priority: P5
Component: sshd
Assignee: [email protected]
Reporter: [email protected]
Log entries such as these lack the attackers IP address
When unneeded ciphers/macs/KexAlgorithms are removed -- we get:
Jan 12 20:17:28 <<REMOVED>> sshd[8888]: fatal: Unable to negotiate a
key exchange method [preauth]
Jan 12 20:19:16 <<REMOVED>> sshd[8890]: fatal: Unable to negotiate a
key exchange method [preauth]
This prevents fail2ban and others from doing some useful attack
mitigation.
Also see:
http://lists.mindrot.org/pipermail/openssh-unix-dev/2015-January/033328.html
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