Based on the syslog event referenced for this article, the ciphers for the client are “ aes128-cbc,3des-cbc,blowfish-cbc,aes192-cbc,aes256-cbc”,
which can be seen in the syslog event and the supported server (WiNG5 devices) ciphers are “aes128-ctr,aes192-ctr,aes256-ctr”.
On the ssh client side (3rd party emulator) ensure that supported ciphers are being used. You may need to consult with the 3rd party emulator vendor
documentation/specification sheets and/or upgrade to the latest version of the emulator software. WiNG5 devices do not support CBC ciphers for
SSH because they have security vulnerabilities.