While troubleshooting a problem with a Linux system this evening, I opened Wireshark and noticed a Secure Shell (SSH) packet from an unexpected source address,
49.116.40.31. When I checked the
fail2ban log on
the system, I noticed that the
IP address
had been banned temporarily several times today, but break-in attempts resumed
whenever the timeout period for the ban expired.# grep '49.116.40.31' /var/log/fail2ban.log | grep 'Ban\|Unban' 2017-01-04 17:20:46,190 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 17:30:47,135 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 17:31:15,276 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 17:41:16,250 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 17:41:43,390 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 17:51:44,299 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 17:52:14,441 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 18:02:15,243 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 18:02:43,383 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 18:12:44,182 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 18:13:13,323 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 18:23:14,227 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 18:24:23,414 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 18:34:24,183 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 18:35:33,368 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 18:45:34,148 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 18:46:44,331 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 18:56:45,126 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 18:57:14,282 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 19:07:15,124 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 19:07:44,270 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 19:17:45,043 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 19:18:14,190 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 19:28:15,111 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 19:29:23,297 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 19:39:23,304 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 19:39:51,441 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 19:49:52,326 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 19:50:21,472 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 20:00:22,251 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 20:00:49,390 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 20:10:50,192 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 20:11:19,338 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 20:21:20,121 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 20:21:49,263 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 20:31:50,036 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 20:33:38,258 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 20:43:39,059 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 2017-01-04 20:44:37,358 fail2ban.actions [25142]: NOTICE [sshd] Ban 49.116.40.31 2017-01-04 20:54:37,372 fail2ban.actions [25142]: NOTICE [sshd] UnBan 49.116.40.31 #
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