May 20 22:10:30 server1 sshd\[3244\]: Invalid user cii from 94.191.71.246
May 20 22:10:30 server1 sshd\[3244\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=94.191.71.246 
May 20 22:10:32 server1 sshd\[3244\]: Failed password for invalid user cii from 94.191.71.246 port 40152 ssh2
May 20 22:16:13 server1 sshd\[5437\]: Invalid user egg from 94.191.71.246
May 20 22:16:13 server1 sshd\[5437\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=94.191.71.246 
...

May 21 06:36:40 plex sshd[26559]: Invalid user qow from 95.243.136.198 port 49922
May 21 06:36:42 plex sshd[26559]: Failed password for invalid user qow from 95.243.136.198 port 49922 ssh2
May 21 06:36:40 plex sshd[26559]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=95.243.136.198
May 21 06:36:40 plex sshd[26559]: Invalid user qow from 95.243.136.198 port 49922
May 21 06:36:42 plex sshd[26559]: Failed password for invalid user qow from 95.243.136.198 port 49922 ssh2

firewall-block, port(s): 648/udp, 998/udp, 1023/udp

May 21 00:59:25 vps46666688 sshd[20680]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=180.76.165.254
May 21 00:59:26 vps46666688 sshd[20680]: Failed password for invalid user fuminori from 180.76.165.254 port 54392 ssh2
...

May 21 06:21:46 vps647732 sshd[3033]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=129.28.157.199
May 21 06:21:48 vps647732 sshd[3033]: Failed password for invalid user ywn from 129.28.157.199 port 42880 ssh2
...

May 21 06:26:38 abendstille sshd\[7405\]: Invalid user vub from 46.175.21.30
May 21 06:26:38 abendstille sshd\[7405\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=46.175.21.30
May 21 06:26:40 abendstille sshd\[7405\]: Failed password for invalid user vub from 46.175.21.30 port 58914 ssh2
May 21 06:30:33 abendstille sshd\[11465\]: Invalid user lfw from 46.175.21.30
May 21 06:30:33 abendstille sshd\[11465\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=46.175.21.30
...

May 21 05:58:58 debian-2gb-nbg1-2 kernel: \[12292361.623571\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=99.240.3.114 DST=195.201.40.59 LEN=40 TOS=0x00 PREC=0x00 TTL=41 ID=49345 PROTO=TCP SPT=24136 DPT=23 WINDOW=57567 RES=0x00 SYN URGP=0

[2020-05-20 23:55:48] NOTICE[1157] chan_sip.c: Registration from '' failed for '5.39.71.23:55620' - Wrong password
[2020-05-20 23:55:48] SECURITY[1173] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-05-20T23:55:48.080-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="3422",SessionID="0x7f5f10385c48",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/5.39.71.23/55620",Challenge="3b889916",ReceivedChallenge="3b889916",ReceivedHash="30e7d6af439fe86265095df00f68408e"
[2020-05-20 23:59:32] NOTICE[1157] chan_sip.c: Registration from '' failed for '5.39.71.23:62926' - Wrong password
[2020-05-20 23:59:32] SECURITY[1173] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-05-20T23:59:32.614-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="2567",SessionID="0x7f5f1051dd08",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/5.39.71.23/62926",Chal
...

May 21 10:59:42 webhost01 sshd[29060]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=123.206.81.59
May 21 10:59:44 webhost01 sshd[29060]: Failed password for invalid user flz from 123.206.81.59 port 58972 ssh2
...

May 21 06:01:58 vmd48417 sshd[12233]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.206.125.99

May 21 06:54:28 pkdns2 sshd\[27708\]: Invalid user sxk from 91.121.49.238May 21 06:54:30 pkdns2 sshd\[27708\]: Failed password for invalid user sxk from 91.121.49.238 port 58058 ssh2May 21 06:57:07 pkdns2 sshd\[27857\]: Invalid user ravi from 91.121.49.238May 21 06:57:09 pkdns2 sshd\[27857\]: Failed password for invalid user ravi from 91.121.49.238 port 45934 ssh2May 21 06:59:42 pkdns2 sshd\[27934\]: Invalid user fny from 91.121.49.238May 21 06:59:44 pkdns2 sshd\[27934\]: Failed password for invalid user fny from 91.121.49.238 port 33806 ssh2
...

ssh brute force

May 21 06:25:55 eventyay sshd[13133]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.204.166.240
May 21 06:25:57 eventyay sshd[13133]: Failed password for invalid user xwg from 121.204.166.240 port 60343 ssh2
May 21 06:29:10 eventyay sshd[13240]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.204.166.240
...

May 21 05:50:52 Ubuntu-1404-trusty-64-minimal sshd\[715\]: Invalid user spk from 139.59.17.33
May 21 05:50:52 Ubuntu-1404-trusty-64-minimal sshd\[715\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=139.59.17.33
May 21 05:50:54 Ubuntu-1404-trusty-64-minimal sshd\[715\]: Failed password for invalid user spk from 139.59.17.33 port 35066 ssh2
May 21 05:59:38 Ubuntu-1404-trusty-64-minimal sshd\[3668\]: Invalid user gmj from 139.59.17.33
May 21 05:59:38 Ubuntu-1404-trusty-64-minimal sshd\[3668\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=139.59.17.33

May 21 05:05:32 combo sshd[25111]: Failed password for root from 222.186.180.6 port 38804 ssh2
May 21 05:05:35 combo sshd[25111]: Failed password for root from 222.186.180.6 port 38804 ssh2
May 21 05:05:39 combo sshd[25111]: Failed password for root from 222.186.180.6 port 38804 ssh2
...