scans once in preceeding hours on the ports (in chronological order) 18656 resulting in total of 1 scans from 223.64.0.0/11 block.

Port scan denied

Aug 28 15:43:09 pkdns2 sshd\[33830\]: Invalid user drone from 223.68.169.180Aug 28 15:43:11 pkdns2 sshd\[33830\]: Failed password for invalid user drone from 223.68.169.180 port 54888 ssh2Aug 28 15:44:53 pkdns2 sshd\[33880\]: Invalid user lls from 223.68.169.180Aug 28 15:44:56 pkdns2 sshd\[33880\]: Failed password for invalid user lls from 223.68.169.180 port 42638 ssh2Aug 28 15:47:59 pkdns2 sshd\[34079\]: Invalid user admin from 223.68.169.180Aug 28 15:48:01 pkdns2 sshd\[34079\]: Failed password for invalid user admin from 223.68.169.180 port 46396 ssh2
...

2020-08-27T20:56:31.262030ionos.janbro.de sshd[80519]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=223.68.169.180
2020-08-27T20:56:31.018590ionos.janbro.de sshd[80519]: Invalid user jason from 223.68.169.180 port 48146
2020-08-27T20:56:32.879314ionos.janbro.de sshd[80519]: Failed password for invalid user jason from 223.68.169.180 port 48146 ssh2
2020-08-27T21:00:25.499760ionos.janbro.de sshd[80524]: Invalid user crx from 223.68.169.180 port 51462
2020-08-27T21:00:25.633685ionos.janbro.de sshd[80524]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=223.68.169.180
2020-08-27T21:00:25.499760ionos.janbro.de sshd[80524]: Invalid user crx from 223.68.169.180 port 51462
2020-08-27T21:00:28.038799ionos.janbro.de sshd[80524]: Failed password for invalid user crx from 223.68.169.180 port 51462 ssh2
2020-08-27T21:04:27.147130ionos.janbro.de sshd[80569]: pam_unix(sshd:auth): authentication failure; logname= uid=0 
...

2020-08-25T16:10:25.418745galaxy.wi.uni-potsdam.de sshd[23174]: Invalid user alvaro from 223.68.169.180 port 56660
2020-08-25T16:10:27.908954galaxy.wi.uni-potsdam.de sshd[23174]: Failed password for invalid user alvaro from 223.68.169.180 port 56660 ssh2
2020-08-25T16:12:48.254756galaxy.wi.uni-potsdam.de sshd[23434]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=223.68.169.180  user=root
2020-08-25T16:12:50.707770galaxy.wi.uni-potsdam.de sshd[23434]: Failed password for root from 223.68.169.180 port 53236 ssh2
2020-08-25T16:15:13.432783galaxy.wi.uni-potsdam.de sshd[23686]: Invalid user mukti from 223.68.169.180 port 49808
2020-08-25T16:15:13.437843galaxy.wi.uni-potsdam.de sshd[23686]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=223.68.169.180
2020-08-25T16:15:13.432783galaxy.wi.uni-potsdam.de sshd[23686]: Invalid user mukti from 223.68.169.180 port 49808
2020-08-25T16:15:15.795790galaxy.wi.uni-potsdam
...

Fail2Ban Ban Triggered (2)

Invalid user bot from 223.68.169.180 port 59394

Aug 21 21:03:14 nextcloud sshd\[7310\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=223.68.169.180  user=root
Aug 21 21:03:16 nextcloud sshd\[7310\]: Failed password for root from 223.68.169.180 port 58884 ssh2
Aug 21 21:04:43 nextcloud sshd\[8914\]: Invalid user andre from 223.68.169.180
Aug 21 21:04:43 nextcloud sshd\[8914\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=223.68.169.180

Aug  6 17:07:48 ns381471 sshd[16998]: Failed password for root from 223.68.169.180 port 54278 ssh2

2020-07-31T21:31:17.778749shield sshd\[16292\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=223.68.169.180  user=root
2020-07-31T21:31:19.620385shield sshd\[16292\]: Failed password for root from 223.68.169.180 port 47348 ssh2
2020-07-31T21:34:40.348762shield sshd\[17476\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=223.68.169.180  user=root
2020-07-31T21:34:42.390872shield sshd\[17476\]: Failed password for root from 223.68.169.180 port 39908 ssh2
2020-07-31T21:38:18.307914shield sshd\[19081\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=223.68.169.180  user=root

Jul 31 14:34:54 ns381471 sshd[26029]: Failed password for root from 223.68.169.180 port 57658 ssh2

2020-07-26T07:48:37.242929lavrinenko.info sshd[28342]: Invalid user lw from 223.68.169.180 port 39968
2020-07-26T07:48:37.248121lavrinenko.info sshd[28342]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=223.68.169.180
2020-07-26T07:48:37.242929lavrinenko.info sshd[28342]: Invalid user lw from 223.68.169.180 port 39968
2020-07-26T07:48:39.425878lavrinenko.info sshd[28342]: Failed password for invalid user lw from 223.68.169.180 port 39968 ssh2
2020-07-26T07:51:36.808862lavrinenko.info sshd[28561]: Invalid user lifan from 223.68.169.180 port 48416
...

2020-07-23T15:58:44.656223lavrinenko.info sshd[19059]: Invalid user anuj from 223.68.169.180 port 42592
2020-07-23T15:58:44.662133lavrinenko.info sshd[19059]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=223.68.169.180
2020-07-23T15:58:44.656223lavrinenko.info sshd[19059]: Invalid user anuj from 223.68.169.180 port 42592
2020-07-23T15:58:46.596981lavrinenko.info sshd[19059]: Failed password for invalid user anuj from 223.68.169.180 port 42592 ssh2
2020-07-23T16:02:59.965388lavrinenko.info sshd[19185]: Invalid user virus from 223.68.169.180 port 36374
...

" "

Jul  4 04:33:13 debian-2gb-nbg1-2 kernel: \[16088613.403941\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=223.68.188.242 DST=195.201.40.59 LEN=40 TOS=0x04 PREC=0x00 TTL=236 ID=41909 PROTO=TCP SPT=46837 DPT=21594 WINDOW=1024 RES=0x00 SYN URGP=0

Dec 27 10:33:53 lnxweb61 sshd[23941]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=202.72.204.226
Dec 27 10:33:53 lnxweb61 sshd[23941]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=202.72.204.226

Invalid user guest from 109.201.155.16 port 50434

Host Scan

Dec 27 07:58:47 debian-2gb-nbg1-2 kernel: \[1082652.026381\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=185.153.197.162 DST=195.201.40.59 LEN=40 TOS=0x00 PREC=0x00 TTL=241 ID=61747 PROTO=TCP SPT=57105 DPT=23390 WINDOW=1024 RES=0x00 SYN URGP=0

(sshd) Failed SSH login from 112.26.44.112 (CN/China/-): 3 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_SSHD; Logs: Dec 27 09:04:19 andromeda sshd[14431]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=112.26.44.112  user=root
Dec 27 09:04:20 andromeda sshd[14431]: Failed password for root from 112.26.44.112 port 54757 ssh2
Dec 27 09:38:15 andromeda sshd[18432]: Invalid user stiver from 112.26.44.112 port 50922

Dec 27 09:07:10 h2177944 kernel: \[632745.066403\] \[UFW BLOCK\] IN=venet0 OUT= MAC= SRC=92.119.160.143 DST=85.214.117.9 LEN=40 TOS=0x00 PREC=0x00 TTL=248 ID=14331 PROTO=TCP SPT=48764 DPT=63616 WINDOW=1024 RES=0x00 SYN URGP=0 
Dec 27 09:07:10 h2177944 kernel: \[632745.066417\] \[UFW BLOCK\] IN=venet0 OUT= MAC= SRC=92.119.160.143 DST=85.214.117.9 LEN=40 TOS=0x00 PREC=0x00 TTL=248 ID=14331 PROTO=TCP SPT=48764 DPT=63616 WINDOW=1024 RES=0x00 SYN URGP=0 
Dec 27 09:11:43 h2177944 kernel: \[633018.494373\] \[UFW BLOCK\] IN=venet0 OUT= MAC= SRC=92.119.160.143 DST=85.214.117.9 LEN=40 TOS=0x00 PREC=0x00 TTL=249 ID=39460 PROTO=TCP SPT=48764 DPT=34460 WINDOW=1024 RES=0x00 SYN URGP=0 
Dec 27 09:11:43 h2177944 kernel: \[633018.494391\] \[UFW BLOCK\] IN=venet0 OUT= MAC= SRC=92.119.160.143 DST=85.214.117.9 LEN=40 TOS=0x00 PREC=0x00 TTL=249 ID=39460 PROTO=TCP SPT=48764 DPT=34460 WINDOW=1024 RES=0x00 SYN URGP=0 
Dec 27 09:23:04 h2177944 kernel: \[633699.458272\] \[UFW BLOCK\] IN=venet0 OUT= MAC= SRC=92.119.160.143 DST=85.214.1

Dec 26 22:47:10 server sshd\[1045\]: Invalid user admin from 206.189.229.112
Dec 26 22:47:10 server sshd\[1045\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=206.189.229.112 
Dec 26 22:47:12 server sshd\[1045\]: Failed password for invalid user admin from 206.189.229.112 port 37110 ssh2
Dec 27 13:20:51 server sshd\[24578\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=206.189.229.112  user=root
Dec 27 13:20:53 server sshd\[24578\]: Failed password for root from 206.189.229.112 port 58004 ssh2
...

Lines containing failures of 196.50.4.94
Dec 24 23:43:39 shared05 sshd[21856]: Invalid user pi from 196.50.4.94 port 51586
Dec 24 23:43:39 shared05 sshd[21856]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=196.50.4.94
Dec 24 23:43:41 shared05 sshd[21856]: Failed password for invalid user pi from 196.50.4.94 port 51586 ssh2
Dec 24 23:43:42 shared05 sshd[21856]: Connection closed by invalid user pi 196.50.4.94 port 51586 [preauth]


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=196.50.4.94

1577427985 - 12/27/2019 07:26:25 Host: 113.53.210.127/113.53.210.127 Port: 445 TCP Blocked

Dec 27 08:29:06 h2177944 sshd\[17630\]: Invalid user mitten from 182.180.142.71 port 35904
Dec 27 08:29:06 h2177944 sshd\[17630\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=182.180.142.71
Dec 27 08:29:09 h2177944 sshd\[17630\]: Failed password for invalid user mitten from 182.180.142.71 port 35904 ssh2
Dec 27 08:53:40 h2177944 sshd\[18892\]: Invalid user denise from 182.180.142.71 port 33106
...

Dec 27 07:55:09 sd-53420 sshd\[22667\]: Invalid user huangguo2010 from 139.59.77.237
Dec 27 07:55:09 sd-53420 sshd\[22667\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=139.59.77.237
Dec 27 07:55:11 sd-53420 sshd\[22667\]: Failed password for invalid user huangguo2010 from 139.59.77.237 port 42849 ssh2
Dec 27 07:58:25 sd-53420 sshd\[23969\]: Invalid user kurtz from 139.59.77.237
Dec 27 07:58:25 sd-53420 sshd\[23969\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=139.59.77.237
...

2019-12-27T11:21:36.246386ns386461 sshd\[15181\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=61.177.172.128  user=root
2019-12-27T11:21:38.235776ns386461 sshd\[15181\]: Failed password for root from 61.177.172.128 port 47343 ssh2
2019-12-27T11:21:41.905580ns386461 sshd\[15181\]: Failed password for root from 61.177.172.128 port 47343 ssh2
2019-12-27T11:21:45.122575ns386461 sshd\[15181\]: Failed password for root from 61.177.172.128 port 47343 ssh2
2019-12-27T11:21:48.084768ns386461 sshd\[15181\]: Failed password for root from 61.177.172.128 port 47343 ssh2
...

Host Scan

MultiHost/MultiPort Probe, Scan, Hack -

Dec 27 09:59:40 cavern sshd[17773]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=142.4.208.165