You could just try logging in via ssh to see if you can do it. If you are on a legacy system then you can download PuTTY and try that though it will not have as much diagnostic capability. There is also a 'portable' version if that is needed.
On the server you can also check what kind of configuration the user sunrisetest has to deal with:
sshd -TChost=serverip,addr=clientip,user=sunrisetest | less