solaris 10 sshd问题

solphin

最近有台NT5440，反复出现无法登陆，挂死现象，后来查看了messages,有sshd的报错，请问这个怎么处理？
Aug  6 17:53:43 gmmas01 su: 'su root' succeeded for bile on /dev/pts/1
Aug  6 18:00:33 gmmas01 sshd[1761]: Failed none for bile from 10.190.192.200 port 45275 ssh2
Aug  6 18:00:35 gmmas01 su: 'su root' succeeded for bile on /dev/pts/2
Aug  6 18:07:17 gmmas01 sshd[2186]: Failed none for bile from 10.190.192.200 port 33659 ssh2
Aug  6 18:07:18 gmmas01 su: 'su root' succeeded for bile on /dev/pts/2
Aug  6 18:12:31 gmmas01 sshd[3076]: Failed none for dtmobile from 10.190.192.200 port 48748 ssh2
Aug  6 18:12:32 gmmas01 su: 'su root' succeeded for bile on /dev/pts/3
Aug  6 18:13:42 gmmas01 sshd[3295]: Failed none for bile from 10.190.192.200 port 48785 ssh2
Aug  6 18:13:44 gmmas01 su: 'su root' succeeded for bile on /dev/pts/4
Aug  6 18:22:11 gmmas01 sshd[4791]: Failed none for bile from 10.190.192.200 port 53832 ssh2
Aug  6 18:22:12 gmmas01 su: 'su root' succeeded for bile on /dev/pts/4
Aug  7 02:03:13 gmmas01 sshd[17353]: Failed password for zhinxj from 10.190.45.54 port 56579 ssh2
Aug  7 02:03:13 gmmas01 sshd[17353]: fatal: Read from socket failed: 同级重置连接
Aug  7 02:18:13 gmmas01 sshd[19676]: Failed password for zhinxj from 10.190.45.54 port 56780 ssh2
Aug  7 02:18:13 gmmas01 sshd[19676]: fatal: Read from socket failed: 同级重置连接
Aug  7 03:05:18 gmmas01 sshd[26924]: Failed password for zhinxj from 10.190.45.54 port 57137 ssh2
Aug  7 03:05:18 gmmas01 sshd[26924]: fatal: Read from socket failed: 同级重置连接
Aug  7 03:20:19 gmmas01 sshd[29292]: Failed password for zhinxj from 10.190.45.54 port 57531 ssh2
Aug  7 03:20:19 gmmas01 sshd[29292]: fatal: Read from socket failed: 同级重置连接
Aug  7 10:20:51 gmmas01 sshd[6062]: Failed none for bile from 10.190.192.200 port 57351 ssh2
Aug  7 10:20:52 gmmas01 su: 'su root' succeeded for bile on /dev/pts/4