Dec 17 11:54:21 ny01 sshd[15793]: Failed password for root from 222.186.15.18 port 20218 ssh2
Dec 17 11:58:18 ny01 sshd[16692]: Failed password for root from 222.186.15.18 port 42257 ssh2

Dec 17 16:11:35 mail sshd[23822]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.254.206.149 
Dec 17 16:11:37 mail sshd[23822]: Failed password for invalid user pink from 51.254.206.149 port 51632 ssh2
Dec 17 16:16:39 mail sshd[25070]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.254.206.149

Dec 17 17:06:09 pornomens sshd\[16251\]: Invalid user shastry from 45.73.12.218 port 44320
Dec 17 17:06:09 pornomens sshd\[16251\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=45.73.12.218
Dec 17 17:06:11 pornomens sshd\[16251\]: Failed password for invalid user shastry from 45.73.12.218 port 44320 ssh2
...

RDP brute forcing (d)

Dec 17 18:09:23 webserver postfix/smtpd\[15856\]: warning: unknown\[87.246.7.34\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Dec 17 18:09:39 webserver postfix/smtpd\[15856\]: warning: unknown\[87.246.7.34\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Dec 17 18:10:10 webserver postfix/smtpd\[15856\]: warning: unknown\[87.246.7.34\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Dec 17 18:10:41 webserver postfix/smtpd\[15856\]: warning: unknown\[87.246.7.34\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Dec 17 18:11:13 webserver postfix/smtpd\[15856\]: warning: unknown\[87.246.7.34\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

Dec 17 07:03:00 kapalua sshd\[15538\]: Invalid user koike from 110.5.46.249
Dec 17 07:03:00 kapalua sshd\[15538\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=aa046249.ppp.asahi-net.or.jp
Dec 17 07:03:02 kapalua sshd\[15538\]: Failed password for invalid user koike from 110.5.46.249 port 63579 ssh2
Dec 17 07:09:57 kapalua sshd\[16495\]: Invalid user passwd0000 from 110.5.46.249
Dec 17 07:09:57 kapalua sshd\[16495\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=aa046249.ppp.asahi-net.or.jp

Dec 17 18:02:43 markkoudstaal sshd[22472]: Failed password for root from 222.186.173.142 port 52256 ssh2
Dec 17 18:02:56 markkoudstaal sshd[22472]: error: maximum authentication attempts exceeded for root from 222.186.173.142 port 52256 ssh2 [preauth]
Dec 17 18:03:07 markkoudstaal sshd[22514]: Failed password for root from 222.186.173.142 port 16950 ssh2

$f2bV_matches

Dec 17 17:02:21 localhost sshd\[75566\]: Invalid user cristiano from 192.3.25.92 port 39841
Dec 17 17:02:21 localhost sshd\[75566\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=192.3.25.92
Dec 17 17:02:23 localhost sshd\[75566\]: Failed password for invalid user cristiano from 192.3.25.92 port 39841 ssh2
Dec 17 17:05:07 localhost sshd\[75657\]: Invalid user isar from 192.3.25.92 port 53621
Dec 17 17:05:07 localhost sshd\[75657\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=192.3.25.92
...

\[2019-12-17 11:57:12\] NOTICE\[2839\] chan_sip.c: Registration from '393 \' failed for '77.247.109.63:5060' - Wrong password
\[2019-12-17 11:57:12\] SECURITY\[2857\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-12-17T11:57:12.812-0500",Severity="Error",Service="SIP",EventVersion="2",AccountID="393",SessionID="0x7f0fb4121288",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/77.247.109.63/5060",Challenge="7fa8517b",ReceivedChallenge="7fa8517b",ReceivedHash="4255023eef1b696ffbc98ce00179472e"
\[2019-12-17 11:57:14\] NOTICE\[2839\] chan_sip.c: Registration from '392 \' failed for '77.247.109.63:5060' - Wrong password
\[2019-12-17 11:57:14\] SECURITY\[2857\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-12-17T11:57:14.429-0500",Severity="Error",Service="SIP",EventVersion="2",AccountID="392",SessionID="0x7f0fb4a5a908",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/77.247.1

Dec 17 17:40:00 MK-Soft-VM7 sshd[8824]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=195.31.160.73 
Dec 17 17:40:02 MK-Soft-VM7 sshd[8824]: Failed password for invalid user rot from 195.31.160.73 port 42930 ssh2
...

Dec 17 17:40:24 markkoudstaal sshd[20038]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.222.115
Dec 17 17:40:26 markkoudstaal sshd[20038]: Failed password for invalid user huebscher from 106.13.222.115 port 49384 ssh2
Dec 17 17:45:48 markkoudstaal sshd[20768]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.222.115

Dec 17 17:49:56 eventyay sshd[24195]: Failed password for root from 218.92.0.170 port 48168 ssh2
Dec 17 17:49:59 eventyay sshd[24195]: Failed password for root from 218.92.0.170 port 48168 ssh2
Dec 17 17:50:03 eventyay sshd[24195]: Failed password for root from 218.92.0.170 port 48168 ssh2
Dec 17 17:50:09 eventyay sshd[24195]: error: maximum authentication attempts exceeded for root from 218.92.0.170 port 48168 ssh2 [preauth]
...

Dec 17 06:36:08 wbs sshd\[32301\]: Invalid user arbenz from 167.114.98.229
Dec 17 06:36:08 wbs sshd\[32301\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=229.ip-167-114-98.net
Dec 17 06:36:10 wbs sshd\[32301\]: Failed password for invalid user arbenz from 167.114.98.229 port 59568 ssh2
Dec 17 06:41:31 wbs sshd\[570\]: Invalid user khatereh from 167.114.98.229
Dec 17 06:41:31 wbs sshd\[570\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=229.ip-167-114-98.net

port scan and connect, tcp 23 (telnet)