Public bug reported:
To replicate:
1: In terminal type:
ssh user@host1.local
2: Type "yes" to add certificate to known hosts.
3: Exit ssh
4: In terminal type:
ssh user@host2.local
5: Type "yes", confirm certificate again.
6: Shut down all computers on the network, wait until the router's DHCP cache
has cleared, start up computers in such an order that host1.local and
host2.local have each others' IP addresses when compared to before shutting
down.
7: In terminal type:
ssh user@host1.local
What should happen:
ssh should accept the certificate automatically because it's the correct
certificate for host1.local
What actually happens:
Warning: the ECDSA host key for 'host1.local' differs from the key for the IP
address '192.168.1.104'
Offending key for IP in /home/user/.ssh/known_hosts:2
Matching host key in /home/user/.ssh/known_hosts:7
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: ssh 1:6.1p1-4
ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
Uname: Linux 3.8.0-31-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.3
Architecture: amd64
Date: Thu Oct 17 18:21:11 2013
InstallationDate: Installed on 2013-08-19 (58 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: openssh
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: openssh (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug raring
** Information type changed from Private Security to Public
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https://bugs.launchpad.net/bugs/1240912
Title:
ssh produces superfluous key mismatch warning when network uses DHCP
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