Can't login into Synology by ssh
Several months ago I find I can't login into my Synology DS216j anymore via ssh.
I used my private key to login but I got Permission denied (publickey) as responds.
I have modified sshd_config on the NAS so there was no other methods to login into it.
I am not sure if this is related but there are quite many users have this problem, according to this discussion thread:
Since there is no built-in terminal in DSM, I looked around to find a way to edit the sshdconfig without ssh. And the answer is pretty much simple: just turn on telnet, login-in via telnet to modify sshdconfig, and turn off telnet.