On 25/08/2017 12:36 PM, Denice wrote:
On Fri, 25 Aug 2017, Gilbert E. Detillieux wrote:

I was relying on host-based authentication (using RSA keys) between hosts in a cluster, and since the latest update to openssh under SL7, that seems to no longer work.  These are the specific packages that were installed as part of the recent yum update:

openssh-7.4p1-11.el7.x86_64.rpm
openssh-askpass-7.4p1-11.el7.x86_64.rpm
openssh-clients-7.4p1-11.el7.x86_64.rpm
openssh-server-7.4p1-11.el7.x86_64.rpm

Any ideas why this stopped working?  Any ideas what I need to tweak to get it working again?

If this is about sshd using DNS to resolve hostnames then I already posted
about this issue in the list:

https://listserv.fnal.gov/scripts/wa.exe?A2=ind1708&L=SCIENTIFIC-LINUX-DEVEL&F=&S=&X=1D29DF5D7C661A9346&Y=deatrich%40triumf.ca&P=11202

for example, if your ssh_known_hosts file uses hostnames instead of IP
addresses then it might be the issue - probably worth giving it a quick
test.

cheers, etc.
   Denice

Yes, that was the issue. I'm not on the SL-devel list, so I hadn't seen your earlier post.

Thanks for the tip!

--
Gilbert E. Detillieux           E-mail: <[email protected]>
Dept. of Computer Science       Web:    http://www.cs.umanitoba.ca/~gedetil/
University of Manitoba          Phone:  (204)474-8161
Winnipeg MB CANADA  R3T 2N2     Fax:    (204)474-7609

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