Feb 26 23:22:46 amit sshd\[1412\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.173.215  user=root
Feb 26 23:22:48 amit sshd\[1412\]: Failed password for root from 222.186.173.215 port 27382 ssh2
Feb 26 23:23:05 amit sshd\[1414\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.173.215  user=root
...

CN_MAINT-CNNIC-AP_<177>1582753846 [1:2010935:3] ET SCAN Suspicious inbound to MSSQL port 1433 [Classification: Potentially Bad Traffic] [Priority: 2] {TCP} 211.99.212.60:47329

Unauthorized IMAP connection attempt

Feb 26 22:57:19 vps647732 sshd[13754]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=203.130.242.68
Feb 26 22:57:21 vps647732 sshd[13754]: Failed password for invalid user pi from 203.130.242.68 port 42205 ssh2
...

2020-02-26T22:26:57.402638vps773228.ovh.net sshd[32208]: Invalid user cashier from 188.166.108.161 port 34240
2020-02-26T22:26:57.411790vps773228.ovh.net sshd[32208]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=188.166.108.161
2020-02-26T22:26:57.402638vps773228.ovh.net sshd[32208]: Invalid user cashier from 188.166.108.161 port 34240
2020-02-26T22:26:59.987051vps773228.ovh.net sshd[32208]: Failed password for invalid user cashier from 188.166.108.161 port 34240 ssh2
2020-02-26T22:43:14.940481vps773228.ovh.net sshd[32298]: Invalid user gitlab-psql from 188.166.108.161 port 37298
2020-02-26T22:43:14.948713vps773228.ovh.net sshd[32298]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=188.166.108.161
2020-02-26T22:43:14.940481vps773228.ovh.net sshd[32298]: Invalid user gitlab-psql from 188.166.108.161 port 37298
2020-02-26T22:43:17.317804vps773228.ovh.net sshd[32298]: Failed password for invalid user gitla
...

port

SSH login attempts

2020-02-26T22:50:39.5371761240 sshd\[22222\]: Invalid user admin from 106.12.212.142 port 46982
2020-02-26T22:50:39.5400981240 sshd\[22222\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.12.212.142
2020-02-26T22:50:41.9994091240 sshd\[22222\]: Failed password for invalid user admin from 106.12.212.142 port 46982 ssh2
...

$f2bV_matches

Feb 26 22:49:44 vps58358 sshd\[3150\]: Invalid user huj from 51.38.57.78Feb 26 22:49:46 vps58358 sshd\[3150\]: Failed password for invalid user huj from 51.38.57.78 port 49476 ssh2Feb 26 22:50:14 vps58358 sshd\[3158\]: Invalid user hujun from 51.38.57.78Feb 26 22:50:16 vps58358 sshd\[3158\]: Failed password for invalid user hujun from 51.38.57.78 port 36566 ssh2Feb 26 22:50:44 vps58358 sshd\[3223\]: Invalid user hukai from 51.38.57.78Feb 26 22:50:47 vps58358 sshd\[3223\]: Failed password for invalid user hukai from 51.38.57.78 port 51902 ssh2
...

Feb 26 23:22:19 debian-2gb-nbg1-2 kernel: \[5014934.186943\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=45.134.179.247 DST=195.201.40.59 LEN=40 TOS=0x00 PREC=0x00 TTL=247 ID=40312 PROTO=TCP SPT=53453 DPT=45120 WINDOW=1024 RES=0x00 SYN URGP=0

[2020-02-26 22:30:45] NOTICE[23721] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '' failed for '104.238.36.190:54500' (callid: 246606734-192116153-1572652886) - Failed to authenticate
[2020-02-26 22:30:45] SECURITY[1911] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-02-26T22:30:45.114+0100",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="246606734-192116153-1572652886",LocalAddress="IPV4/UDP/185.118.197.148/5060",RemoteAddress="IPV4/UDP/104.238.36.190/54500",Challenge="1582752644/829faa3b96ccb6c1f36096416c29afc3",Response="5c15519ac8b1050e7da1dbd30a4852cd",ExpectedResponse=""
[2020-02-26 22:30:45] NOTICE[11886] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '' failed for '104.238.36.190:54500' (callid: 246606734-192116153-1572652886) - Failed to authenticate
[2020-02-26 22:30:45] SECURITY[1911] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-02-26T22:3

2020-02-26T22:13:11.389172www postfix/smtpd[19389]: warning: unknown[220.174.24.4]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
2020-02-26T22:33:18.236327www postfix/smtpd[32019]: warning: unknown[220.174.24.4]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
2020-02-26T22:51:15.333172www postfix/smtpd[32611]: warning: unknown[220.174.24.4]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

84.234.96.71 was recorded 9 times by 7 hosts attempting to connect to the following ports: 3702,1900. Incident counter (4h, 24h, all-time): 9, 22, 81

scan z