DO NOT allow root to login remotely

Most of hackers or bots try to login your system using root account.

Here are my login log for today.



Jan 22 07:33:12 SS sshd[27679]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.100.27.36 user=root
Jan 22 07:33:14 SS sshd[27679]: Failed password for root from 125.100.27.36 port 33058 ssh2
Jan 22 07:33:16 SS sshd[27681]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.100.27.36 user=root
Jan 22 07:33:17 SS sshd[27681]: Failed password for root from 125.100.27.36 port 33251 ssh2
Jan 22 07:33:19 SS sshd[27683]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.100.27.36 user=root
Jan 22 07:33:21 SS sshd[27683]: Failed password for root from 125.100.27.36 port 33652 ssh2
Jan 22 07:33:22 SS sshd[27685]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.100.27.36 user=root
Jan 22 07:33:24 SS sshd[27685]: Failed password for root from 125.100.27.36 port 34040 ssh2
Jan 22 07:33:25 SS sshd[27687]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.100.27.36 user=root
Jan 22 07:33:28 SS sshd[27687]: Failed password for root from 125.100.27.36 port 34421 ssh2
Jan 22 07:33:29 SS sshd[27689]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.100.27.36 user=root
Jan 22 07:33:31 SS sshd[27689]: Failed password for root from 125.100.27.36 port 34794 ssh2
Jan 22 07:33:33 SS sshd[27691]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.100.27.36 user=root
Jan 22 07:33:35 SS sshd[27691]: Failed password for root from 125.100.27.36 port 35120 ssh2
Jan 22 07:33:36 SS sshd[27693]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.100.27.36 user=root
Jan 22 07:33:38 SS sshd[27693]: Failed password for root from 125.100.27.36 port 35430 ssh2
Jan 22 07:33:40 SS sshd[27695]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.100.27.36 user=root
Jan 22 07:33:42 SS sshd[27695]: Failed password for root from 125.100.27.36 port 35781 ssh2
Jan 22 07:33:43 SS sshd[27697]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.100.27.36 user=root
Jan 22 07:33:46 SS sshd[27697]: Failed password for root from 125.100.27.36 port 36107 ssh2
Jan 22 07:33:47 SS sshd[27699]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.100.27.36 user=root
Jan 22 07:33:49 SS sshd[27699]: Failed password for root from 125.100.27.36 port 36419 ssh2
Jan 22 07:33:50 SS sshd[27701]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.100.27.36 user=root
Jan 22 07:33:52 SS sshd[27701]: Failed password for root from 125.100.27.36 port 36732 ssh2
Jan 22 07:33:54 SS sshd[27703]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.100.27.36 user=root
Jan 22 07:33:56 SS sshd[27703]: Failed password for root from 125.100.27.36 port 37035 ssh2

So, for security reason, disable root remote login and choose a strong user name and password.