For help, the first log received

For help, see the first log-Linux general technology-Linux technology and application information. [I = s] This post was last edited by loven86

I am a beginner in LINUX.
Please help me read this log. Because it is terrible to see 2 IP addresses, 1 Korea, and 1 Europe...
Root (113.10.45.83): 3 Time (s) South Korea
Root (151.77.230.236): 3 Time (s) have I been targeted in Europe ~~

What does the following log mean ..

CODE: ################## Logwatch 7.3 (03/24/06) #################### Processing Initiated: Tue Jul 12 02:22:37 2011 Date Range Processed: yesterday (2011-Jul-11) Period is day. Detail Level of Output: 0 Type of Output: unformatted Logfiles for Host: idc5247 ######################################## ########################## ------------------- Pam_unix Begin ------------------------ Sshd: Authentication Failures: Root (113.10.45.83): 3 Time (s) Root (151.77.230.236): 3 Time (s) ---------------------- Pam_unix End ------------------------- --------------------- Sendmail Begin ------------------------ SENDMAIL CONFIGURATION ---------------------- Aliases database out of date 4 Time (s) ---------------------- Sendmail End ------------------------- --------------------- SSHD Begin ------------------------ Disconnecting after too authentication failures for user: Root: 6 Time (s) Failed logins from: 113.10.45.83: 3 times 151.77.230.236: 3 times ** Unmatched Entries ** PAM 6 more authentication failures; logname = uid = 0 euid = 0 tty = ssh ruser = rhost = 113.10.45.83 user = root: 3 time (s) PAM service (sshd) ignoring max retries; 7> 3: 6 time (s) PAM 6 more authentication failures; logname = uid = 0 euid = 0 tty = ssh ruser = rhost = 151.77.230.236 user = root: 3 time (s) ---------------------- SSHD End ------------------------- --------------------- Disk Space Begin ------------------------ Filesystem Size Used Avail Use % Mounted on /Dev/mapper/VolGroup00-LogVol00 141 GB 5.1G 129G 4%/ /Dev/sda1 99 M 19 M 76m 20%/boot ---------------------- Disk Space End ------------------------- ###################### Logwatch End ################ #########