几分钟前,发现有个家伙攻击我,怎么禁止了它

Question

May 27 17:44:54 nxgzserver proftpd[15972]: nxgzserver (61.191.254.44[61.191.254.44]) - FTP session opened.
May 27 17:44:54 nxgzserver proftpd[15972]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'upload'
May 27 17:44:54 nxgzserver proftpd[15972]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'up'
May 27 17:44:55 nxgzserver proftpd[15972]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'test'
May 27 17:44:55 nxgzserver proftpd[15972]: nxgzserver (61.191.254.44[61.191.254.44]) - FTP session closed.
May 27 17:44:55 nxgzserver proftpd[15973]: nxgzserver (61.191.254.44[61.191.254.44]) - FTP session opened.
May 27 17:44:55 nxgzserver proftpd[15973]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'movieup'
May 27 17:44:55 nxgzserver proftpd[15973]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'tvup'
May 27 17:44:56 nxgzserver proftpd[15973]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'softup'
May 27 17:44:56 nxgzserver proftpd[15973]: nxgzserver (61.191.254.44[61.191.254.44]) - FTP session closed.
May 27 17:44:56 nxgzserver proftpd[15974]: nxgzserver (61.191.254.44[61.191.254.44]) - FTP session opened.
May 27 17:44:56 nxgzserver proftpd[15974]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'comicup'
May 27 17:44:56 nxgzserver proftpd[15974]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'upload'
May 27 17:44:56 nxgzserver proftpd[15974]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'up'
May 27 17:44:56 nxgzserver proftpd[15974]: nxgzserver (61.191.254.44[61.191.254.44]) - FTP session closed.
May 27 17:44:57 nxgzserver proftpd[15975]: nxgzserver (61.191.254.44[61.191.254.44]) - FTP session opened.
May 27 17:44:57 nxgzserver proftpd[15975]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'test'
May 27 17:44:57 nxgzserver proftpd[15975]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'movieup'
May 27 17:44:57 nxgzserver proftpd[15975]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'tvup'
May 27 17:44:57 nxgzserver proftpd[15975]: nxgzserver (61.191.254.44[61.191.254.44]) - FTP session closed.
May 27 17:44:58 nxgzserver proftpd[15976]: nxgzserver (61.191.254.44[61.191.254.44]) - FTP session opened.
May 27 17:44:58 nxgzserver proftpd[15976]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'softup'
May 27 17:44:58 nxgzserver proftpd[15976]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'comicup'
May 27 17:44:58 nxgzserver proftpd[15976]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'upload'
May 27 17:44:58 nxgzserver proftpd[15976]: nxgzserver (61.191.254.44[61.191.254.44]) - FTP session closed.
May 27 17:44:59 nxgzserver proftpd[15977]: nxgzserver (61.191.254.44[61.191.254.44]) - FTP session opened.
May 27 17:44:59 nxgzserver proftpd[15977]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'upload'
May 27 17:44:59 nxgzserver proftpd[15977]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'up'
May 27 17:44:59 nxgzserver proftpd[15977]: nxgzserver (61.191.254.44[61.191.254.44]) - no such user 'ftp'
May 27 17:44:59 nxgzserver proftpd[15977]: nxgzserver (61.191.254.44[61.191.254.44]) - FTP session closed.

Answer 1

iptables -A INPUT -s 61.191.254.44 DROP

Answer 2

如果它的IP是变化的呢?

Answer 3

那没办法老,你开服务,肯定要公开,除非你把服务都关掉!~~~

Answer 4

推荐使用portsentry
http://blog.chinaunix.net/article.php?articleId=11885&blogId=126