Influence of openssh version on SSH mutual trust creation in RAC environment

In the near future , Encountered in a user AIX Environmental installation RAC Cluster database , appear SSH The problem of creating mutual trust .

At first, according to the normal analysis idea , analysis OUI Log information during installation , newspaper SSH Your keys do not match ;

At this point, first pass in /etc/ssh/sshd_config The corresponding encryption algorithm is added to the file , Still can't solve .

Subsequent investigation found that SSH Version too high （aix 7.1 Installed on openssh 8 edition ）; Back to openssh 6 Version solves the problem . And that reminds us again , install ORACLE Database time , To be in MOS On the corresponding operating system version 、 The database version authentication matches and is checked .

[INS-06006] Passwordless SSH connectivity not set up between the following node(s): [test1]
ssh Mutual testing makes sense , But the software installation does not pass
as a result of openssh Version too high :
# ssh -V
OpenSSH_8.0p1, OpenSSL 1.0.2r 26 Feb 2019
resolvent :
drop Openssh Version to 7.4 that will do