网络安全检测|网络安全服务|网络安全扫描-香港墨客投资移动版

有谁知道怎样防止这类攻击，有人想攻克进入我的系统。这已持续一段时间了，虽然他未能进入系统，但我的邮件服务器仍然受到影响，会出现罢工现象（即发送我的邮件它不马上出现在收件箱，但重起服务，就可看到，然后就一切正常）\r\n\r\n我已经将该服务器的FTP、Telnet在防火墙封闭了但还是出现下面情况。想知道他到底是做了什么而导致出现下面日志？\r\n\r\n\r\nroot@mailserver # more messages.0\r\nFeb 23 16:16:42 mailserver in.ftpd[7602]: [ID 120637 daemon.warning] test (bogus) LOGIN FAILED [from 202.103.197.50]\r\nFeb 23 16:16:49 mailserver in.ftpd[7604]: [ID 120637 daemon.warning] up (bogus) LOGIN FAILED [from 202.103.197.50]\r\n\r\n\r\nroot@mailserver # more messages.1\r\n\r\nFeb 18 16:22:29 mailserver last message repeated 1 time\r\nFeb 21 12:34:47 mailserver in.ftpd[6385]: [ID 120637 daemon.warning] backup (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:48 mailserver in.ftpd[6400]: [ID 120637 daemon.warning] web (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:48 mailserver in.ftpd[6388]: [ID 120637 daemon.warning] account (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:49 mailserver in.ftpd[6390]: [ID 120637 daemon.warning] webmaster (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:49 mailserver in.ftpd[6391]: [ID 120637 daemon.warning] data (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:49 mailserver in.ftpd[6389]: [ID 120637 daemon.warning] webmaster (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:50 mailserver in.ftpd[6395]: [ID 120637 daemon.warning] oracle (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:50 mailserver in.ftpd[6394]: [ID 120637 daemon.warning] sybase (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:50 mailserver in.ftpd[6402]: [ID 120637 daemon.warning] access (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:50 mailserver in.ftpd[6387]: [ID 120637 daemon.warning] account (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:51 mailserver in.ftpd[6392]: [ID 120637 daemon.warning] data (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:51 mailserver in.ftpd[6398]: [ID 120637 daemon.warning] test (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:51 mailserver in.ftpd[6386]: [ID 120637 daemon.warning] access (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:53 mailserver in.ftpd[6397]: [ID 120637 daemon.warning] test (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:54 mailserver in.ftpd[6393]: [ID 120637 daemon.warning] sybase (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:54 mailserver in.ftpd[6406]: [ID 120637 daemon.warning] web (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:54 mailserver in.ftpd[6399]: [ID 120637 daemon.warning] user (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:54 mailserver in.ftpd[6405]: [ID 120637 daemon.warning] user (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:54 mailserver in.ftpd[6404]: [ID 120637 daemon.warning] backup (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:54 mailserver in.ftpd[6403]: [ID 120637 daemon.warning] admin (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:54 mailserver in.ftpd[6396]: [ID 120637 daemon.warning] oracle (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:55 mailserver in.ftpd[6407]: [ID 120637 daemon.warning] webmaster (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:34:56 mailserver in.ftpd[6412]: [ID 120637 daemon.warning] backup (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:35:01 mailserver in.ftpd[6414]: [ID 120637 daemon.warning] oracle (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:35:01 mailserver in.ftpd[6421]: [ID 120637 daemon.warning] access (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:35:01 mailserver in.ftpd[6417]: [ID 120637 daemon.warning] account (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:35:01 mailserver in.ftpd[6425]: [ID 120637 daemon.warning] web (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:35:04 mailserver in.ftpd[6420]: [ID 120637 daemon.warning] user (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:35:04 mailserver in.ftpd[6423]: [ID 120637 daemon.warning] test (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:35:08 mailserver in.ftpd[6424]: [ID 120637 daemon.warning] admin (bogus) LOGIN FAILED [from 61.53.50.18]\r\nFeb 21 12:35:10 mailserver in.ftpd[6428]: [ID 120637 daemon.warning] sybase (bogus) LOGIN FAILED [from 61.53.50.18]\r\nroot@mailserver # \r\n\r\n\r\n\r\nroot@mailserver # more messages.2\r\nFeb 10 00:44:54 mailserver in.ftpd[24143]: [ID 120637 daemon.warning] test (bogus) LOGIN FAILED [from 211.157.100.125]\r\nFeb 10 00:44:56 mailserver in.ftpd[24144]: [ID 120637 daemon.warning] softup (bogus) LOGIN FAILED [from 211.157.100.125]\r\nFeb 10 00:44:57 mailserver in.ftpd[24145]: [ID 120637 daemon.warning] up (bogus) LOGIN FAILED [from 211.157.100.125]\r\nFeb 10 00:44:59 mailserver in.ftpd[24146]: [ID 120637 daemon.warning] tvup (bogus) LOGIN FAILED [from 211.157.100.125]\r\nFeb 10 00:45:00 mailserver in.ftpd[24147]: [ID 120637 daemon.warning] upload (bogus) LOGIN FAILED [from 211.157.100.125]\r\n\r\n\r\nFeb 14 04:47:09 mailserver in.ftpd[1758]: [ID 120637 daemon.warning] test (bogus) LOGIN FAILED [from 61.78.53.54]\r\nFeb 14 04:47:11 mailserver in.ftpd[1759]: [ID 120637 daemon.warning] softup (bogus) LOGIN FAILED [from 61.78.53.54]\r\nFeb 14 04:47:13 mailserver in.ftpd[1760]: [ID 120637 daemon.warning] up (bogus) LOGIN FAILED [from 61.78.53.54]\r\nFeb 14 04:47:16 mailserver in.ftpd[1761]: [ID 120637 daemon.warning] tvup (bogus) LOGIN FAILED [from 61.78.53.54]\r\nFeb 14 04:47:18 mailserver in.ftpd[1762]: [ID 120637 daemon.warning] upload (bogus) LOGIN FAILED [from 61.78.53.54]\r\nroot@mailserver # \r\nroot@mailserver # \r\n\r\n\r\nroot@mailserver # more messages.3\r\nFeb  1 20:30:06 mailserver in.ftpd[19261]: [ID 120637 daemon.warning] test (bogus) LOGIN FAILED [from 61.232.64.207]\r\nFeb  1 20:30:08 mailserver in.ftpd[19262]: [ID 120637 daemon.warning] softup (bogus) LOGIN FAILED [from 61.232.64.207]\r\nFeb  1 20:30:10 mailserver in.ftpd[19263]: [ID 120637 daemon.warning] up (bogus) LOGIN FAILED [from 61.232.64.207]\r\nFeb  1 20:30:12 mailserver in.ftpd[19264]: [ID 120637 daemon.warning] tvup (bogus) LOGIN FAILED [from 61.232.64.207]\r\nFeb  1 20:30:14 mailserver in.ftpd[19265]: [ID 120637 daemon.warning] upload (bogus) LOGIN FAILED [from 61.232.64.207]\r\nroot@mailserver #