You may find that you receive a fatal error when attempting a SSH connection to QRadar using PuTTY after upgrading to QRadar 7.2mr3.
After the upgrade, the following PuTTY exception may be received:
PuTTY Fatal Error:
Couldn't agree a client-to-server cipher (available: aes128-ctr,aes192-ctr,aes-256-ctr,arcfour256,arcfour128,arcfour)
An older version of PuTTY may be in use which does not support the cipher used by this version of QRadar.
Resolving The Problem
Upgrading to PuTTY version .60 or later will address the issue.
Where do you find more information?
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16 June 2018