In 2.1 the openSSH stack has been upgraded to version 7.9 which includes the advanced HMAC (authentication) algorithms. The default HMAC algorithms were changed to SHA2-256, SHA2-512, SHA2-256-ETM, SHA2-512-ETM. In 2.0.5, the default HMAC was SHA1 (less secured). Older versions of putty (at least putty version 0.60) would fail to establish SSH connection to cnMatrix after upgrading to 2.1 because it does not support the advanced HMACs. It is strongly recommended to upgrade putty to a later versions (ver .70 or higher). If for any reason, putty
version 0.60 needs to be used, please access the switch’sWeb GUI System->SSH and select HMAC-MD5 and HMAC-SHA1 in the HMAC list.
- Screenshot (5).png (50.1 KB)
