Brute force SMTP login attempted.
...

Oct  3 02:23:58 ms-srv sshd[15433]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.37.92.42
Oct  3 02:24:01 ms-srv sshd[15433]: Failed password for invalid user scott from 194.37.92.42 port 54354 ssh2

Oct  8 23:07:23 vmanager6029 sshd\[31344\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.37.92.42  user=root
Oct  8 23:07:25 vmanager6029 sshd\[31344\]: Failed password for root from 194.37.92.42 port 41836 ssh2
Oct  8 23:11:52 vmanager6029 sshd\[31498\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.37.92.42  user=root

2019-10-06T17:00:09.843943abusebot-2.cloudsearch.cf sshd\[23463\]: Invalid user 5T6Y7U8I9O0P from 194.37.92.42 port 43777

Oct  6 09:54:50 piServer sshd[31962]: Failed password for root from 194.37.92.42 port 56634 ssh2
Oct  6 09:59:13 piServer sshd[32240]: Failed password for root from 194.37.92.42 port 48677 ssh2
...

Automatic report - Banned IP Access

Aug  5 01:55:28 server sshd\[4339\]: Invalid user user3 from 194.37.92.42 port 37327
Aug  5 01:55:28 server sshd\[4339\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.37.92.42
Aug  5 01:55:30 server sshd\[4339\]: Failed password for invalid user user3 from 194.37.92.42 port 37327 ssh2
Aug  5 02:00:17 server sshd\[27057\]: User root from 194.37.92.42 not allowed because listed in DenyUsers
Aug  5 02:00:17 server sshd\[27057\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.37.92.42  user=root

Invalid user appldisc from 194.37.92.42 port 45794
pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.37.92.42
Failed password for invalid user appldisc from 194.37.92.42 port 45794 ssh2
Invalid user nano from 194.37.92.42 port 45211
pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.37.92.42

Invalid user wyf from 194.37.92.42 port 41223

Brute force SMTP login attempted.
...

Aug  9 12:59:25 ms-srv sshd[62637]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.37.92.48
Aug  9 12:59:27 ms-srv sshd[62637]: Failed password for invalid user tour from 194.37.92.48 port 46067 ssh2

k+ssh-bruteforce

Invalid user tomcat from 194.37.92.48 port 35454

Oct 24 05:57:03 mail sshd[5669]: Failed password for root from 194.37.92.48 port 33523 ssh2
Oct 24 06:01:02 mail sshd[7802]: Failed password for root from 194.37.92.48 port 52874 ssh2

Oct 22 22:36:57 dedicated sshd[24196]: Invalid user admin from 194.37.92.48 port 37937

Oct 20 07:11:19 server sshd\[29518\]: Invalid user tomasi from 194.37.92.48
Oct 20 07:11:19 server sshd\[29518\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.37.92.48 
Oct 20 07:11:22 server sshd\[29518\]: Failed password for invalid user tomasi from 194.37.92.48 port 42570 ssh2
Oct 20 07:31:49 server sshd\[4115\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.37.92.48  user=root
Oct 20 07:31:50 server sshd\[4115\]: Failed password for root from 194.37.92.48 port 47795 ssh2
...

2019-10-19T04:09:08.592059abusebot-6.cloudsearch.cf sshd\[3482\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.37.92.48  user=root

Oct 16 00:21:10 firewall sshd[32612]: Invalid user aringsta from 194.37.92.48
Oct 16 00:21:12 firewall sshd[32612]: Failed password for invalid user aringsta from 194.37.92.48 port 47437 ssh2
Oct 16 00:27:26 firewall sshd[32685]: Invalid user duckie from 194.37.92.48
...

Oct  6 08:03:56 SilenceServices sshd[23768]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.37.92.48
Oct  6 08:03:58 SilenceServices sshd[23768]: Failed password for invalid user Law@2017 from 194.37.92.48 port 59766 ssh2
Oct  6 08:08:26 SilenceServices sshd[24971]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.37.92.48

SSH Brute-Force reported by Fail2Ban

2019-09-22T17:48:13.017399abusebot-4.cloudsearch.cf sshd\[23302\]: Invalid user anicom from 194.37.92.48 port 53564

Sep 22 08:22:58 bouncer sshd\[4633\]: Invalid user public from 194.37.92.48 port 56836
Sep 22 08:22:58 bouncer sshd\[4633\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.37.92.48 
Sep 22 08:22:59 bouncer sshd\[4633\]: Failed password for invalid user public from 194.37.92.48 port 56836 ssh2
...

Aug  3 17:12:30 [munged] sshd[17075]: Invalid user network3 from 194.37.92.48 port 49687
Aug  3 17:12:30 [munged] sshd[17075]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.37.92.48

Aug  3 05:42:27 MK-Soft-VM5 sshd\[17945\]: Invalid user murai from 194.37.92.48 port 53354
Aug  3 05:42:27 MK-Soft-VM5 sshd\[17945\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.37.92.48
Aug  3 05:42:30 MK-Soft-VM5 sshd\[17945\]: Failed password for invalid user murai from 194.37.92.48 port 53354 ssh2
...

Dec  9 04:24:37 vibhu-HP-Z238-Microtower-Workstation sshd\[10186\]: Invalid user electro from 74.208.230.197
Dec  9 04:24:37 vibhu-HP-Z238-Microtower-Workstation sshd\[10186\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=74.208.230.197
Dec  9 04:24:39 vibhu-HP-Z238-Microtower-Workstation sshd\[10186\]: Failed password for invalid user electro from 74.208.230.197 port 38038 ssh2
Dec  9 04:29:48 vibhu-HP-Z238-Microtower-Workstation sshd\[10534\]: Invalid user geancarlos from 74.208.230.197
Dec  9 04:29:48 vibhu-HP-Z238-Microtower-Workstation sshd\[10534\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=74.208.230.197
...

Dec  9 00:11:12 sd-53420 sshd\[9896\]: Invalid user kaede from 159.89.115.126
Dec  9 00:11:12 sd-53420 sshd\[9896\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.89.115.126
Dec  9 00:11:14 sd-53420 sshd\[9896\]: Failed password for invalid user kaede from 159.89.115.126 port 56798 ssh2
Dec  9 00:16:44 sd-53420 sshd\[10822\]: Invalid user anjen from 159.89.115.126
Dec  9 00:16:44 sd-53420 sshd\[10822\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.89.115.126
...

Dec  8 23:10:37 hcbbdb sshd\[5665\]: Invalid user corine from 150.223.11.7
Dec  8 23:10:37 hcbbdb sshd\[5665\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=150.223.11.7
Dec  8 23:10:39 hcbbdb sshd\[5665\]: Failed password for invalid user corine from 150.223.11.7 port 32899 ssh2
Dec  8 23:16:03 hcbbdb sshd\[6314\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=150.223.11.7  user=root
Dec  8 23:16:05 hcbbdb sshd\[6314\]: Failed password for root from 150.223.11.7 port 58955 ssh2

Dec  6 23:05:05 mail sshd[1760]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=193.70.85.206 
Dec  6 23:05:07 mail sshd[1760]: Failed password for invalid user hdpuser from 193.70.85.206 port 46238 ssh2
Dec  6 23:10:10 mail sshd[3131]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=193.70.85.206

Dec  9 00:31:56 ns37 sshd[10794]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=96.242.247.102
Dec  9 00:31:56 ns37 sshd[10794]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=96.242.247.102

Dec  8 13:26:48 sachi sshd\[29118\]: Invalid user mima0123 from 85.192.71.245
Dec  8 13:26:48 sachi sshd\[29118\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=43013099.xtec.cat
Dec  8 13:26:49 sachi sshd\[29118\]: Failed password for invalid user mima0123 from 85.192.71.245 port 34524 ssh2
Dec  8 13:32:19 sachi sshd\[29619\]: Invalid user withhold from 85.192.71.245
Dec  8 13:32:19 sachi sshd\[29619\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=43013099.xtec.cat

Dec  9 00:14:24 sd-53420 sshd\[10431\]: User gdm from 51.68.44.158 not allowed because none of user's groups are listed in AllowGroups
Dec  9 00:14:24 sd-53420 sshd\[10431\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.68.44.158  user=gdm
Dec  9 00:14:26 sd-53420 sshd\[10431\]: Failed password for invalid user gdm from 51.68.44.158 port 40864 ssh2
Dec  9 00:19:33 sd-53420 sshd\[11340\]: Invalid user blakeley from 51.68.44.158
Dec  9 00:19:33 sd-53420 sshd\[11340\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.68.44.158
...

Dec  8 23:59:29 sso sshd[8350]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=40.121.194.179
Dec  8 23:59:31 sso sshd[8350]: Failed password for invalid user raisbeck from 40.121.194.179 port 58508 ssh2
...

Dec  6 23:03:59 mail sshd[1437]: Failed password for root from 139.199.66.206 port 52504 ssh2
Dec  6 23:10:11 mail sshd[3129]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=139.199.66.206 
Dec  6 23:10:13 mail sshd[3129]: Failed password for invalid user aclocal from 139.199.66.206 port 43720 ssh2

Dec  6 23:06:09 mail sshd[1973]: Failed password for amavis from 62.234.156.66 port 48130 ssh2
Dec  6 23:13:16 mail sshd[3704]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=62.234.156.66 
Dec  6 23:13:18 mail sshd[3704]: Failed password for invalid user guest from 62.234.156.66 port 45928 ssh2

Dec  9 03:52:50 gw1 sshd[31774]: Failed password for root from 150.95.110.90 port 52024 ssh2
...

2019-12-08T23:31:21.982899abusebot-4.cloudsearch.cf sshd\[26592\]: Invalid user pms from 187.23.211.32 port 60662

Dec  8 23:53:35 OPSO sshd\[6545\]: Invalid user jacqueline from 5.196.226.217 port 49844
Dec  8 23:53:35 OPSO sshd\[6545\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.196.226.217
Dec  8 23:53:37 OPSO sshd\[6545\]: Failed password for invalid user jacqueline from 5.196.226.217 port 49844 ssh2
Dec  8 23:59:33 OPSO sshd\[8191\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.196.226.217  user=root
Dec  8 23:59:34 OPSO sshd\[8191\]: Failed password for root from 5.196.226.217 port 58598 ssh2

Dec  8 23:54:09 v22018086721571380 sshd[1155]: Failed password for invalid user hayashi from 82.166.93.77 port 38980 ssh2

Tried sshing with brute force.