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trouble with host keys
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bernd....@helmholtz-muenchen.de
Mar 20, 2013, 4:49:23 PM3/20/13
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Hi,
i had some weird experiences with a freshly installed system and the ssh host keys. The system is a KVM VM, running SLES 11 SP2 64bit. I had to reinstall the system. So i choosed in yast "new installation" and wanted to reformat the old partitions. The whole installation ran fine, and the new system booted perfectly. But i had the identical host keys as before ! I installed again, choosed again "new installation" and reformatted the partitions - again the old host keys.
I was very astonished. Then i filled all sectors of the hd with zeros using dd, afterwards again reinstallation. And now i have new keys. So the "formatting" wasn't a real one. Is this behaviour (saving the old host keys) coming from openssh (version 5.1p1-41.51.1) or does it depend on SLES 11 ? Thanks for any answer.
Bernd
i had some weird experiences with a freshly installed system and the ssh host keys. The system is a KVM VM, running SLES 11 SP2 64bit. I had to reinstall the system. So i choosed in yast "new installation" and wanted to reformat the old partitions. The whole installation ran fine, and the new system booted perfectly. But i had the identical host keys as before ! I installed again, choosed again "new installation" and reformatted the partitions - again the old host keys.
I was very astonished. Then i filled all sectors of the hd with zeros using dd, afterwards again reinstallation. And now i have new keys. So the "formatting" wasn't a real one. Is this behaviour (saving the old host keys) coming from openssh (version 5.1p1-41.51.1) or does it depend on SLES 11 ? Thanks for any answer.
Bernd
bernd....@helmholtz-muenchen.de
Mar 28, 2013, 11:04:47 AM3/28/13
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the keys are kept, despite of choosing "new installation" and "formatting" in yast ! Further information:
https://forums.suse.com/showthread.php?2565-ssh-host-keys-kept-despite-of-fresh-installation
Bernd
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