Just a hint of part of the problem
Feb 6 04:08:18 sshd: Failed password for illegal user test from 212.94.223.99 port 59096 ssh2 Feb 6 04:08:18 sshd: Failed password for illegal user test from 212.94.223.99 port 59105 ssh2 Feb 6 04:08:18 sshd: Failed password for illegal user test from 212.94.223.99 port 59094 ssh2 Feb 6 04:08:27 sshd: Failed password for illegal user guest from 212.94.223.99 port 59499 ssh2 Feb 6 04:08:27 sshd: Failed password for illegal user guest from 212.94.223.99 port 59513 ssh2
Feb 6 04:08:29 sshd: Illegal user admin from 212.94.223.99 Feb 6 04:08:29 sshd: Illegal user admin from 212.94.223.99 Feb 6 04:08:34 sshd: Failed password for illegal user admin from 212.94.223.99 port 59838 ssh2 Feb 6 04:08:34 sshd: Failed password for illegal user admin from 212.94.223.99 port 59845 ssh2 Feb 6 04:08:36 sshd: Illegal user admin from 212.94.223.99 Feb 6 04:08:38 sshd: Illegal user admin from 212.94.223.99 Feb 6 04:08:41 sshd: Failed password for illegal user admin from 212.94.223.99 port 60219 ssh2 Feb 6 04:08:43 sshd: Failed password for illegal user admin from 212.94.223.99 port 60221 ssh2 Feb 6 04:08:47 sshd: Failed password for illegal user user from 212.94.223.99 port 60378 ssh2 Feb 6 04:08:49 sshd: Failed password for illegal user user from 212.94.223.99 port 60422 ssh2 Feb 6 04:08:54 sshd: Failed password for root from 212.94.223.99 port 60541 ssh2 Feb 6 04:08:56 sshd: Failed password for root from 212.94.223.99 port 60586 ssh2 Feb 6 04:09:01 sshd: Failed password for root from 212.94.223.99 port 60682 ssh2 Feb 6 04:09:03 sshd: Failed password for root from 212.94.223.99 port 60736 ssh2 Feb 6 04:09:08 sshd: Failed password for root from 212.94.223.99 port 60831 ssh2 Feb 6 04:09:10 sshd: Failed password for root from 212.94.223.99 port 60865 ssh2 Feb 6 04:09:15 sshd: Failed password for illegal user test from 212.94.223.99 port 60947 ssh2 Feb 6 04:09:16 sshd: Failed password for illegal user test from 212.94.223.99 port 60984 ssh2
And, just a little while later:
Feb 7 12:46:54 sshd: Failed password for illegal user student from ::ffff:210.100.255.3 port 49627 ssh2 Feb 7 12:46:56 sshd: Failed password for illegal user ben from ::ffff:210.100.255.3 port 50122 ssh2 Feb 7 12:46:58 sshd: Failed password for illegal user leonard from ::ffff:210.100.255.3 port 50483 ssh2 Feb 7 12:47:00 sshd: Failed password for illegal user benedict from ::ffff:210.100.255.3 port 51343 ssh2 Feb 7 12:47:01 sshd: Failed password for illegal user benjamin from ::ffff:210.100.255.3 port 51492 ssh2 Feb 7 12:47:03 sshd: Failed password for illegal user benny from ::ffff:210.100.255.3 port 51745 ssh2 Feb 7 12:47:05 sshd: Failed password for illegal user bernardo from ::ffff:210.100.255.3 port 52557 ssh2 Feb 7 12:47:07 sshd: Failed password for illegal user berta from ::ffff:210.100.255.3 port 52863 ssh2 Feb 7 12:47:14 sshd: Failed password for illegal user william from ::ffff:210.100.255.3 port 54956 ssh2 Feb 7 12:47:15 sshd: Failed password for illegal user bitmap from ::ffff:210.100.255.3 port 55149 ssh2 Feb 7 12:47:17 sshd: Failed password for illegal user bizkit from ::ffff:210.100.255.3 port 55373 ssh2 Feb 7 12:47:24 sshd: Failed password for illegal user angela from ::ffff:210.100.255.3 port 57111 ssh2 Feb 7 12:47:26 sshd: Failed password for illegal user bjoern from ::ffff:210.100.255.3 port 57350 ssh2 Feb 7 12:47:28 sshd: Failed password for illegal user michael from ::ffff:210.100.255.3 port 57576 ssh2 Feb 7 12:47:30 sshd: Failed password for illegal user eagle from ::ffff:210.100.255.3 port 58321 ssh2 Feb 7 12:47:31 sshd: Failed password for illegal user captain from ::ffff:210.100.255.3 port 59057 ssh2 Feb 7 12:47:33 sshd: Failed password for illegal user jonathan from ::ffff:210.100.255.3 port 59382 ssh2 Feb 7 12:47:40 sshd: Failed password for illegal user richard from ::ffff:210.100.255.3 port 34041 ssh2 Feb 7 12:47:42 sshd: Failed password for illegal user sylvia from ::ffff:210.100.255.3 port 34440 ssh2 Feb 7 12:47:44 sshd: Failed password for illegal user martin from ::ffff:210.100.255.3 port 34647 ssh2 Feb 7 12:47:45 sshd: Failed password for illegal user bobby from ::ffff:210.100.255.3 port 35757 ssh2 Feb 7 12:47:47 sshd: Failed password for illegal user gracie from ::ffff:210.100.255.3 port 36036 ssh2 Feb 7 12:47:49 sshd: Failed password for illegal user smith from ::ffff:210.100.255.3 port 36750 ssh2 Feb 7 12:47:51 sshd: Failed password for illegal user stan from ::ffff:210.100.255.3 port 37391 ssh2 Feb 7 12:47:53 sshd: Failed password for illegal user austin from ::ffff:210.100.255.3 port 37652 ssh2 Feb 7 12:47:54 sshd: Failed password for illegal user jimmy from ::ffff:210.100.255.3 port 38254 ssh2 Feb 7 12:47:56 sshd: Failed password for illegal user ashley from ::ffff:210.100.255.3 port 38875 ssh2 Feb 7 12:47:58 sshd: Failed password for root from ::ffff:210.100.255.3 port 39137 ssh2 Feb 7 12:48:00 sshd: Failed password for illegal user master from ::ffff:210.100.255.3 port 40171 ssh2 Feb 7 12:48:02 sshd: Failed password for illegal user barry from ::ffff:210.100.255.3 port 40480 ssh2 Feb 7 12:48:03 sshd: Failed password for illegal user veronica from ::ffff:210.100.255.3 port 40665 ssh2 Feb 7 12:48:05 sshd: Failed password for illegal user henry from ::ffff:210.100.255.3 port 41705 ssh2 Feb 7 12:48:07 sshd: Failed password for illegal user brenda from ::ffff:210.100.255.3 port 41986 ssh2 Feb 7 12:48:09 sshd: Failed password for illegal user krista from ::ffff:210.100.255.3 port 42661 ssh2 Feb 7 12:48:11 sshd: Failed password for illegal user max from ::ffff:210.100.255.3 port 43284 ssh2 Feb 7 12:48:13 sshd: Failed password for illegal user eyes from ::ffff:210.100.255.3 port 43472 ssh2 Feb 7 12:48:14 sshd: Failed password for illegal user kerilyn from ::ffff:210.100.255.3 port 44212 ssh2 Feb 7 12:48:16 sshd: Failed password for illegal user morgan from ::ffff:210.100.255.3 port 44859 ssh2 Feb 7 12:48:18 sshd: Failed password for illegal user shannon from ::ffff:210.100.255.3 port 45159 ssh2 Feb 7 12:48:20 sshd: Failed password for illegal user susan from ::ffff:210.100.255.3 port 46233 ssh2 Feb 7 12:48:22 sshd: Failed password for illegal user andrea from ::ffff:210.100.255.3 port 46576 ssh2 Feb 7 12:48:23 sshd: Failed password for illegal user lindsay from ::ffff:210.100.255.3 port 46906 ssh2 Feb 7 12:48:25 sshd: Failed password for illegal user bradley from ::ffff:210.100.255.3 port 48254 ssh2 Feb 7 12:48:27 sshd: Failed password for illegal user eddie from ::ffff:210.100.255.3 port 48547 ssh2 Feb 7 12:48:29 sshd: Failed password for illegal user brett from ::ffff:210.100.255.3 port 48883 ssh2 Feb 7 12:48:31 sshd: Failed password for illegal user brian from ::ffff:210.100.255.3 port 50014 ssh2 Feb 7 12:48:32 sshd: Failed password for illegal user schott from ::ffff:210.100.255.3 port 50257 ssh2 Feb 7 12:48:34 sshd: Failed password for illegal user adriana from ::ffff:210.100.255.3 port 50975 ssh2 Feb 7 12:48:36 sshd: Failed password for illegal user marty from ::ffff:210.100.255.3 port 51663 ssh2 Feb 7 12:48:38 sshd: Failed password for illegal user smitt from ::ffff:210.100.255.3 port 51973 ssh2 Feb 7 12:48:40 sshd: Failed password for illegal user mitchell from ::ffff:210.100.255.3 port 53202 ssh2 Feb 7 12:48:42 sshd: Failed password for illegal user tiffany from ::ffff:210.100.255.3 port 53418 ssh2 Feb 7 12:48:43 sshd: Failed password for illegal user blue from ::ffff:210.100.255.3 port 53715 ssh2 Feb 7 12:48:45 sshd: Failed password for illegal user carl from ::ffff:210.100.255.3 port 54842 ssh2 Feb 7 12:48:47 sshd: Failed password for illegal user ben from ::ffff:210.100.255.3 port 55200 ssh2 Feb 7 12:48:49 sshd: Failed password for illegal user carlos from ::ffff:210.100.255.3 port 55864 ssh2 Feb 7 12:48:51 sshd: Failed password for illegal user caroline from ::ffff:210.100.255.3 port 56794 ssh2 Feb 7 12:48:52 sshd: Failed password for illegal user carolyn from ::ffff:210.100.255.3 port 57085 ssh2 Feb 7 12:48:54 sshd: Failed password for illegal user carroll from ::ffff:210.100.255.3 port 57776 ssh2 Feb 7 12:48:56 sshd: Failed password for illegal user aaron from ::ffff:210.100.255.3 port 58418 ssh2 Feb 7 12:48:58 sshd: Failed password for illegal user andy from ::ffff:210.100.255.3 port 58797 ssh2 Feb 7 12:49:00 sshd: Failed password for illegal user harley from ::ffff:210.100.255.3 port 59671 ssh2 Feb 7 12:49:02 sshd: Failed password for illegal user bridget from ::ffff:210.100.255.3 port 60449 ssh2 Feb 7 12:49:04 sshd: Failed password for illegal user charlie from ::ffff:210.100.255.3 port 33017 ssh2 Feb 7 12:49:06 sshd: Failed password for illegal user sophie from ::ffff:210.100.255.3 port 33752 ssh2 Feb 7 12:49:08 sshd: Failed password for illegal user roberto from ::ffff:210.100.255.3 port 33960 ssh2 Feb 7 12:49:09 sshd: Failed password for illegal user jeff from ::ffff:210.100.255.3 port 34609 ssh2 Feb 7 12:49:16 sshd: Failed password for illegal user daniel from ::ffff:210.100.255.3 port 36946 ssh2 Feb 7 12:49:18 sshd: Failed password for illegal user danielle from ::ffff:210.100.255.3 port 37220 ssh2 Feb 7 12:49:20 sshd: Failed password for illegal user dave from ::ffff:210.100.255.3 port 38346 ssh2 Feb 7 12:49:22 sshd: Failed password for illegal user peter from ::ffff:210.100.255.3 port 38697 ssh2 Feb 7 12:49:24 sshd: Failed password for illegal user danny from ::ffff:210.100.255.3 port 38843 ssh2 Feb 7 12:49:25 sshd: Failed password for illegal user claudia from ::ffff:210.100.255.3 port 39880 ssh2 Feb 7 12:49:27 sshd: Failed password for illegal user reene from ::ffff:210.100.255.3 port 40168 ssh2 Feb 7 12:49:29 sshd: Failed password for illegal user patrick from ::ffff:210.100.255.3 port 40769 ssh2 Feb 7 12:49:31 sshd: Failed password for illegal user stewart from ::ffff:210.100.255.3 port 41421 ssh2 Feb 7 12:49:33 sshd: Failed password for illegal user murphy from ::ffff:210.100.255.3 port 41662 ssh2 Feb 7 12:49:34 sshd: Failed password for illegal user eddie from ::ffff:210.100.255.3 port 42247 ssh2 Feb 7 12:49:36 sshd: Failed password for illegal user evelyn from ::ffff:210.100.255.3 port 42924 ssh2 Feb 7 12:49:38 sshd: Failed password for illegal user smitt from ::ffff:210.100.255.3 port 43176 ssh2 Feb 7 12:49:40 sshd: Failed password for illegal user simon from ::ffff:210.100.255.3 port 44260 ssh2 Feb 7 12:49:42 sshd: Failed password for illegal user frank from ::ffff:210.100.255.3 port 44502 ssh2 Feb 7 12:49:43 sshd: Failed password for illegal user samara from ::ffff:210.100.255.3 port 44731 ssh2 Feb 7 12:49:45 sshd: Failed password for illegal user laura from ::ffff:210.100.255.3 port 45804 ssh2 Feb 7 12:49:47 sshd: Failed password for illegal user katie from ::ffff:210.100.255.3 port 46126 ssh2 Feb 7 12:49:49 sshd: Failed password for illegal user georgio from ::ffff:210.100.255.3 port 46702 ssh2 Feb 7 12:49:51 sshd: Failed password for illegal user gerry from ::ffff:210.100.255.3 port 47416 ssh2 Feb 7 12:49:52 sshd: Failed password for illegal user smith from ::ffff:210.100.255.3 port 47671 ssh2 Feb 7 12:49:54 sshd: Failed password for illegal user jimmy from ::ffff:210.100.255.3 port 48281 ssh2 Feb 7 12:49:56 sshd: Failed password for illegal user steven from ::ffff:210.100.255.3 port 48943 ssh2 Feb 7 12:49:58 sshd: Failed password for illegal user morris from ::ffff:210.100.255.3 port 49201 ssh2 Feb 7 12:50:00 sshd: Failed password for illegal user stanford from ::ffff:210.100.255.3 port 50193 ssh2 Feb 7 12:50:02 sshd: Failed password for illegal user joe from ::ffff:210.100.255.3 port 50403 ssh2 Feb 7 12:50:03 sshd: Failed password for illegal user jonathan from ::ffff:210.100.255.3 port 50663 ssh2 Feb 7 12:50:05 sshd: Failed password for illegal user josh from ::ffff:210.100.255.3 port 51739 ssh2 Feb 7 12:50:07 sshd: Failed password for illegal user kevin from ::ffff:210.100.255.3 port 52252 ssh2 Feb 7 12:50:09 sshd: Failed password for illegal user rhonda from ::ffff:210.100.255.3 port 52766 ssh2 Feb 7 12:50:11 sshd: Failed password for illegal user tony from ::ffff:210.100.255.3 port 53984 ssh2 Feb 7 12:50:13 sshd: Failed password for illegal user tommy from ::ffff:210.100.255.3 port 54582 ssh2 Feb 7 12:50:15 sshd: Failed password for illegal user thomas from ::ffff:210.100.255.3 port 55147 ssh2 Feb 7 12:50:16 sshd: Failed password for illegal user spider from ::ffff:210.100.255.3 port 55685 ssh2 Feb 7 12:50:18 sshd: Failed password for illegal user sony from ::ffff:210.100.255.3 port 56033 ssh2 Feb 7 12:50:20 sshd: Failed password for illegal user robert from ::ffff:210.100.255.3 port 56941 ssh2 Feb 7 12:50:22 sshd: Failed password for illegal user robbie from ::ffff:210.100.255.3 port 57335 ssh2 Feb 7 12:50:24 sshd: Failed password for illegal user phill from ::ffff:210.100.255.3 port 57921 ssh2 Feb 7 12:50:26 sshd: Failed password for illegal user phil from ::ffff:210.100.255.3 port 58437 ssh2 Feb 7 12:50:27 sshd: Failed password for illegal user natasha from ::ffff:210.100.255.3 port 58838 ssh2 Feb 7 12:50:29 sshd: Failed password for root from ::ffff:210.100.255.3 port 59439 ssh2 Feb 7 12:50:31 sshd: Failed password for root from ::ffff:210.100.255.3 port 60039 ssh2 Feb 7 12:50:33 sshd: Failed password for root from ::ffff:210.100.255.3 port 60414 ssh2 Feb 7 12:50:35 sshd: Failed password for root from ::ffff:210.100.255.3 port 60946 ssh2 Feb 7 12:50:36 sshd: Failed password for root from ::ffff:210.100.255.3 port 33284 ssh2 Feb 7 12:50:43 sshd: Failed password for root from ::ffff:210.100.255.3 port 35291 ssh2 Feb 7 12:50:45 sshd: Failed password for root from ::ffff:210.100.255.3 port 36571 ssh2 Feb 7 12:50:47 sshd: Failed password for root from ::ffff:210.100.255.3 port 36993 ssh2 Feb 7 12:50:49 sshd: Failed password for root from ::ffff:210.100.255.3 port 37194 ssh2