Root access to Synology NAS via SSH

After setting up PuTTY, it is very easy to gain access to the NAS:

1. Connect to the NAS
2. Insert NAS username
3. Insert NAS password
4. After logging in, type sudo -i. This will allow to gain root access
5. Insert password of root account

login as: alex //1.
alex@192.xxx.x.xxx's password: //2.
alex@192.xxx.x.xxx:~$ sudo -i //3.
Password: //4.
root@192.xxx.x.xxx:~#