After upgrading from 4.1.7 to 4.2.3 users are unable to login via SSH although they are able to login to the desktop.
SSH debug reports the following errors.
# /usr/sbin/sshd -ddd -p 2222 2>&1 | tee /tmp/vas_sshd.log
/usr/sbin/sshd: Symbol `vassym_krb5_mcc_ops' has different size in shared object, consider re-linking
/usr/sbin/sshd: symbol lookup error: /usr/sbin/sshd: undefined symbol: vassym_GSS_C_NT_HOSTBASED_SERVICE
An unsupported version of SSH is installed on the host.
From the Authentication Services snapshot “rpm.qa.out” shows that “quest-openssh-5.2p1_q1-1” is the installed version of SSH.
This installed version of ssh has been out of support since 2012
Resolution:
The installed version of SSH needs to be replaced with the latest version of OpenSSH.
/etc/ssh/sshd_config
/etc/ssh/ssh_config
# rpm -e quest-openssh-5.2p1_q1-1
# yum install openssh
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