Keep in mind that SSH scanning is only supported for *nix based systems like Linux, Unix and Mac. Other network devices are preferably scanned through SNMP. More info on device scanning requirements can be found here. Device scanning instructions can be found here.
Keep in mind that SSH scanning is only supported for *nix based systems like Linux, Unix and Mac. Other network devices are preferably scanned through SNMP. More info on device scanning requirements can be found here. Device scanning instructions can be found here.
You might have tried it already, but I'd throw wireshark on there and capture the scan for a minute or two. Sometimes the SSH implementation by a given vendor can be quirky - like Cisco devices which require two sessions, not just one. In that case, the scanner vendor has to develop to the implementation of the device vendor to accommodate the response.
Bad credentials also may imply a failed certificate exchange at initial SSH connection.