[2020-03-04 01:29:18] NOTICE[1148] chan_sip.c: Registration from '"4003" ' failed for '216.245.197.14:5631' - Wrong password
[2020-03-04 01:29:18] SECURITY[1163] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-03-04T01:29:18.747-0500",Severity="Error",Service="SIP",EventVersion="2",AccountID="4003",SessionID="0x7fd82cb29a68",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/216.245.197.14/5631",Challenge="58d51e48",ReceivedChallenge="58d51e48",ReceivedHash="941115d03dd74673edc56361c308a039"
[2020-03-04 01:29:18] NOTICE[1148] chan_sip.c: Registration from '"4003" ' failed for '216.245.197.14:5631' - Wrong password
[2020-03-04 01:29:18] SECURITY[1163] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-03-04T01:29:18.833-0500",Severity="Error",Service="SIP",EventVersion="2",AccountID="4003",SessionID="0x7fd82c39c1e8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP
...

MultiHost/MultiPort Probe, Scan, Hack -

Mar  3 19:43:08 web1 sshd\[4712\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.196.7.133  user=mail
Mar  3 19:43:09 web1 sshd\[4712\]: Failed password for mail from 5.196.7.133 port 41900 ssh2
Mar  3 19:51:54 web1 sshd\[5497\]: Invalid user server-pilotuser from 5.196.7.133
Mar  3 19:51:54 web1 sshd\[5497\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.196.7.133
Mar  3 19:51:56 web1 sshd\[5497\]: Failed password for invalid user server-pilotuser from 5.196.7.133 port 53724 ssh2

Mar  4 05:59:39 * sshd[29249]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.196.38.14
Mar  4 05:59:41 * sshd[29249]: Failed password for invalid user michael from 5.196.38.14 port 25905 ssh2

Mar  4 06:29:49 ns381471 sshd[23726]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=213.212.255.140
Mar  4 06:29:51 ns381471 sshd[23726]: Failed password for invalid user mc from 213.212.255.140 port 38897 ssh2

Brute-force general attack.

Mar  4 05:40:36 game-panel sshd[13749]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=167.71.216.44
Mar  4 05:40:38 game-panel sshd[13749]: Failed password for invalid user node from 167.71.216.44 port 55386 ssh2
Mar  4 05:50:31 game-panel sshd[14027]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=167.71.216.44

Unauthorized connection attempt detected from IP address 31.17.212.37 to FTP

Mar  4 05:59:21 debian-2gb-nbg1-2 kernel: \[5557137.255496\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=144.134.27.205 DST=195.201.40.59 LEN=44 TOS=0x00 PREC=0x40 TTL=47 ID=10031 PROTO=TCP SPT=37619 DPT=37215 WINDOW=32995 RES=0x00 SYN URGP=0

Mar  4 11:32:05 areeb-Workstation sshd[9085]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=59.36.161.45 
Mar  4 11:32:08 areeb-Workstation sshd[9085]: Failed password for invalid user mailman from 59.36.161.45 port 60940 ssh2
...

$f2bV_matches

Mar  4 10:29:42 areeb-Workstation sshd[26466]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=41.223.4.155 
Mar  4 10:29:44 areeb-Workstation sshd[26466]: Failed password for invalid user minecraft from 41.223.4.155 port 38046 ssh2
...

Mar  4 07:01:27 ns381471 sshd[27206]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=220.85.104.202
Mar  4 07:01:28 ns381471 sshd[27206]: Failed password for invalid user lishanbin from 220.85.104.202 port 40928 ssh2

2020-03-04T05:52:11.325953vfs-server-01 sshd\[32484\]: Invalid user ubuntu from 167.71.177.106 port 44334
2020-03-04T05:55:36.128104vfs-server-01 sshd\[32620\]: Invalid user test from 167.71.177.106 port 42174
2020-03-04T05:58:58.176434vfs-server-01 sshd\[32757\]: Invalid user postgres from 167.71.177.106 port 42438

Unauthorized connection ftp attempt detected from IP address 37.49.230.64