2020-08-09 16:17:28 dovecot_login authenticator failed for \(User\) \[91.191.209.153\]: 535 Incorrect authentication data \(set_id=cadvisor@hosting1.no-server.de\)
2020-08-09 16:17:39 dovecot_login authenticator failed for \(User\) \[91.191.209.153\]: 535 Incorrect authentication data \(set_id=cadvisor@hosting1.no-server.de\)
2020-08-09 16:17:46 dovecot_login authenticator failed for \(User\) \[91.191.209.153\]: 535 Incorrect authentication data \(set_id=cadvisor@hosting1.no-server.de\)
2020-08-09 16:17:48 dovecot_login authenticator failed for \(User\) \[91.191.209.153\]: 535 Incorrect authentication data \(set_id=cadvisor@hosting1.no-server.de\)
2020-08-09 16:18:07 dovecot_login authenticator failed for \(User\) \[91.191.209.153\]: 535 Incorrect authentication data \(set_id=margaux@hosting1.no-server.de\)
...

2020-08-08 18:31:36 dovecot_login authenticator failed for \(User\) \[91.191.209.153\]: 535 Incorrect authentication data \(set_id=consultation@hosting1.no-server.de\)
2020-08-08 18:31:47 dovecot_login authenticator failed for \(User\) \[91.191.209.153\]: 535 Incorrect authentication data \(set_id=consultation@hosting1.no-server.de\)
2020-08-08 18:31:55 dovecot_login authenticator failed for \(User\) \[91.191.209.153\]: 535 Incorrect authentication data \(set_id=consultation@hosting1.no-server.de\)
2020-08-08 18:32:05 dovecot_login authenticator failed for \(User\) \[91.191.209.153\]: 535 Incorrect authentication data \(set_id=add_new@hosting1.no-server.de\)
2020-08-08 18:32:18 dovecot_login authenticator failed for \(User\) \[91.191.209.153\]: 535 Incorrect authentication data \(set_id=add_new@hosting1.no-server.de\)
2020-08-08 18:32:22 dovecot_login authenticator failed for \(User\) \[91.191.209.153\]: 535 Incorrect authentication data \(set_id=add_new@hosting1.no-server.de\)
2020-08
...

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2020-07-31 15:01:11 SMTP protocol synchronization error (input sent whostnamehout wahostnameing for greeting): rejected connection from H=[91.191.209.153] input="QUhostnamern"
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2020-07-31 15:09:25 dovecot_login authentica........
------------------------------

Jul 31 15:38:49 auth: Info: passwd-file(fw1@hosting.usmancity.ru,91.191.209.153): unknown user
...

bad IP/DDoS

Bad IP

Vulnerability Scanner

Aug  9 16:22:31 blackbee postfix/smtpd[12052]: warning: unknown[91.191.209.132]: SASL LOGIN authentication failed: authentication failure
Aug  9 16:23:05 blackbee postfix/smtpd[12045]: warning: unknown[91.191.209.132]: SASL LOGIN authentication failed: authentication failure
Aug  9 16:23:41 blackbee postfix/smtpd[12053]: warning: unknown[91.191.209.132]: SASL LOGIN authentication failed: authentication failure
Aug  9 16:24:17 blackbee postfix/smtpd[12052]: warning: unknown[91.191.209.132]: SASL LOGIN authentication failed: authentication failure
Aug  9 16:24:51 blackbee postfix/smtpd[12052]: warning: unknown[91.191.209.132]: SASL LOGIN authentication failed: authentication failure
...

2020-08-09 17:34:12 dovecot_login authenticator failed for \(User\) \[91.191.209.94\]: 535 Incorrect authentication data \(set_id=bid@hosting1.no-server.de\)
2020-08-09 17:34:20 dovecot_login authenticator failed for \(User\) \[91.191.209.94\]: 535 Incorrect authentication data \(set_id=bid@hosting1.no-server.de\)
2020-08-09 17:34:39 dovecot_login authenticator failed for \(User\) \[91.191.209.94\]: 535 Incorrect authentication data \(set_id=admind@hosting1.no-server.de\)
2020-08-09 17:34:50 dovecot_login authenticator failed for \(User\) \[91.191.209.94\]: 535 Incorrect authentication data \(set_id=admind@hosting1.no-server.de\)
2020-08-09 17:34:57 dovecot_login authenticator failed for \(User\) \[91.191.209.94\]: 535 Incorrect authentication data \(set_id=admind@hosting1.no-server.de\)
2020-08-09 17:34:59 dovecot_login authenticator failed for \(User\) \[91.191.209.94\]: 535 Incorrect authentication data \(set_id=admind@hosting1.no-server.de\)
...

2020-08-09 17:30:46 dovecot_login authenticator failed for \(User\) \[91.191.209.190\]: 535 Incorrect authentication data \(set_id=xiaobao@hosting1.no-server.de\)
2020-08-09 17:30:53 dovecot_login authenticator failed for \(User\) \[91.191.209.190\]: 535 Incorrect authentication data \(set_id=v1-prober@hosting1.no-server.de\)
2020-08-09 17:31:05 dovecot_login authenticator failed for \(User\) \[91.191.209.190\]: 535 Incorrect authentication data \(set_id=v1-prober@hosting1.no-server.de\)
2020-08-09 17:31:08 dovecot_login authenticator failed for \(User\) \[91.191.209.190\]: 535 Incorrect authentication data \(set_id=v1-prober@hosting1.no-server.de\)
2020-08-09 17:31:24 dovecot_login authenticator failed for \(User\) \[91.191.209.190\]: 535 Incorrect authentication data \(set_id=v1-prober@hosting1.no-server.de\)
...

2020-08-09 17:13:09 dovecot_login authenticator failed for \(User\) \[91.191.209.37\]: 535 Incorrect authentication data \(set_id=mweb@hosting1.no-server.de\)
2020-08-09 17:13:25 dovecot_login authenticator failed for \(User\) \[91.191.209.37\]: 535 Incorrect authentication data \(set_id=mweb@hosting1.no-server.de\)
2020-08-09 17:13:31 dovecot_login authenticator failed for \(User\) \[91.191.209.37\]: 535 Incorrect authentication data \(set_id=mweb@hosting1.no-server.de\)
2020-08-09 17:13:38 dovecot_login authenticator failed for \(User\) \[91.191.209.37\]: 535 Incorrect authentication data \(set_id=fid@hosting1.no-server.de\)
2020-08-09 17:13:53 dovecot_login authenticator failed for \(User\) \[91.191.209.37\]: 535 Incorrect authentication data \(set_id=fid@hosting1.no-server.de\)
2020-08-09 17:14:01 dovecot_login authenticator failed for \(User\) \[91.191.209.37\]: 535 Incorrect authentication data \(set_id=fid@hosting1.no-server.de\)
...

2020-08-09T16:09:51.037243beta postfix/smtpd[13939]: warning: unknown[91.191.209.47]: SASL LOGIN authentication failed: authentication failure
2020-08-09T16:10:34.007302beta postfix/smtpd[13966]: warning: unknown[91.191.209.47]: SASL LOGIN authentication failed: authentication failure
2020-08-09T16:11:13.906428beta postfix/smtpd[13962]: warning: unknown[91.191.209.47]: SASL LOGIN authentication failed: authentication failure
...

2020-08-09 17:05:28 dovecot_login authenticator failed for (User) [91.191.209.72]: 535 Incorrect authentication data (set_id=alfred1@server.kaan.tk)
...

2020-08-09 15:20:11 dovecot_login authenticator failed for \(User\) \[91.191.209.193\]: 535 Incorrect authentication data \(set_id=789456123@hosting1.no-server.de\)
2020-08-09 15:20:19 dovecot_login authenticator failed for \(User\) \[91.191.209.193\]: 535 Incorrect authentication data \(set_id=789456123@hosting1.no-server.de\)
2020-08-09 15:20:23 dovecot_login authenticator failed for \(User\) \[91.191.209.193\]: 535 Incorrect authentication data \(set_id=789456123@hosting1.no-server.de\)
2020-08-09 15:20:25 dovecot_login authenticator failed for \(User\) \[91.191.209.193\]: 535 Incorrect authentication data \(set_id=789456123@hosting1.no-server.de\)
2020-08-09 15:20:51 dovecot_login authenticator failed for \(User\) \[91.191.209.193\]: 535 Incorrect authentication data \(set_id=october@hosting1.no-server.de\)
...

2020-08-09 14:02:47 dovecot_login authenticator failed for \(User\) \[91.191.209.188\]: 535 Incorrect authentication data
2020-08-09 14:02:48 dovecot_login authenticator failed for \(User\) \[91.191.209.188\]: 535 Incorrect authentication data
2020-08-09 14:07:16 dovecot_login authenticator failed for \(User\) \[91.191.209.188\]: 535 Incorrect authentication data \(set_id=dev14@hosting1.no-server.de\)
2020-08-09 14:07:38 dovecot_login authenticator failed for \(User\) \[91.191.209.188\]: 535 Incorrect authentication data \(set_id=rahmani@hosting1.no-server.de\)
2020-08-09 14:07:50 dovecot_login authenticator failed for \(User\) \[91.191.209.188\]: 535 Incorrect authentication data \(set_id=rahmani@hosting1.no-server.de\)
2020-08-09 14:07:52 dovecot_login authenticator failed for \(User\) \[91.191.209.188\]: 535 Incorrect authentication data \(set_id=rahmani@hosting1.no-server.de\)
2020-08-09 14:07:56 dovecot_login authenticator failed for \(User\) \[91.191.209.188\]: 535 Incorrect auth
...

2020-08-09 10:31:27 dovecot_login authenticator failed for \(User\) \[91.191.209.188\]: 535 Incorrect authentication data
2020-08-09 10:31:28 dovecot_login authenticator failed for \(User\) \[91.191.209.188\]: 535 Incorrect authentication data
2020-08-09 10:36:53 dovecot_login authenticator failed for \(User\) \[91.191.209.188\]: 535 Incorrect authentication data \(set_id=myfiles@hosting1.no-server.de\)
2020-08-09 10:37:05 dovecot_login authenticator failed for \(User\) \[91.191.209.188\]: 535 Incorrect authentication data \(set_id=myfiles@hosting1.no-server.de\)
2020-08-09 10:37:06 dovecot_login authenticator failed for \(User\) \[91.191.209.188\]: 535 Incorrect authentication data \(set_id=myfiles@hosting1.no-server.de\)
...

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2020-07-31........
------------------------------

2020-08-09 00:31:22 dovecot_login authenticator failed for \(User\) \[91.191.209.37\]: 535 Incorrect authentication data \(set_id=brain@hosting1.no-server.de\)
2020-08-09 00:31:34 dovecot_login authenticator failed for \(User\) \[91.191.209.37\]: 535 Incorrect authentication data \(set_id=bf@hosting1.no-server.de\)
2020-08-09 00:31:47 dovecot_login authenticator failed for \(User\) \[91.191.209.37\]: 535 Incorrect authentication data \(set_id=bf@hosting1.no-server.de\)
2020-08-09 00:31:54 dovecot_login authenticator failed for \(User\) \[91.191.209.37\]: 535 Incorrect authentication data \(set_id=bf@hosting1.no-server.de\)
2020-08-09 00:32:03 dovecot_login authenticator failed for \(User\) \[91.191.209.37\]: 535 Incorrect authentication data \(set_id=bf@hosting1.no-server.de\)
2020-08-09 00:32:11 dovecot_login authenticator failed for \(User\) \[91.191.209.37\]: 535 Incorrect authentication data \(set_id=medios@hosting1.no-server.de\)
...

Aug  8 22:31:37 blackbee postfix/smtpd[6655]: warning: unknown[91.191.209.142]: SASL LOGIN authentication failed: authentication failure
Aug  8 22:32:19 blackbee postfix/smtpd[6655]: warning: unknown[91.191.209.142]: SASL LOGIN authentication failed: authentication failure
Aug  8 22:33:00 blackbee postfix/smtpd[6655]: warning: unknown[91.191.209.142]: SASL LOGIN authentication failed: authentication failure
Aug  8 22:33:43 blackbee postfix/smtpd[6655]: warning: unknown[91.191.209.142]: SASL LOGIN authentication failed: authentication failure
Aug  8 22:34:21 blackbee postfix/smtpd[6672]: warning: unknown[91.191.209.142]: SASL LOGIN authentication failed: authentication failure
...

Honeypot attack, port: 445, PTR: PTR record not found

firewall-block, port(s): 1433/tcp

2020-02-03T04:19:23.8860851495-001 sshd[25476]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=157.230.246.176  user=r.r
2020-02-03T04:19:25.9113761495-001 sshd[25476]: Failed password for r.r from 157.230.246.176 port 52272 ssh2
2020-02-03T04:49:32.3936871495-001 sshd[26757]: Invalid user wpyan from 157.230.246.176 port 52722
2020-02-03T04:49:32.4014061495-001 sshd[26757]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=157.230.246.176
2020-02-03T04:49:32.3936871495-001 sshd[26757]: Invalid user wpyan from 157.230.246.176 port 52722
2020-02-03T04:49:34.4377461495-001 sshd[26757]: Failed password for invalid user wpyan from 157.230.246.176 port 52722 ssh2
2020-02-03T04:52:23.3761261495-001 sshd[26874]: Invalid user mariah1 from 157.230.246.176 port 60104
2020-02-03T04:52:23.3854521495-001 sshd[26874]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=157........
------------------------------

Feb  3 10:29:50 firewall sshd[13390]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=212.64.109.31
Feb  3 10:29:50 firewall sshd[13390]: Invalid user stack from 212.64.109.31
Feb  3 10:29:52 firewall sshd[13390]: Failed password for invalid user stack from 212.64.109.31 port 45964 ssh2
...

detected by Fail2Ban

Feb  3 14:27:05 markkoudstaal sshd[12479]: Failed password for root from 95.111.74.98 port 34642 ssh2
Feb  3 14:30:01 markkoudstaal sshd[13002]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=95.111.74.98
Feb  3 14:30:03 markkoudstaal sshd[13002]: Failed password for invalid user dspace from 95.111.74.98 port 33390 ssh2

Unauthorized connection attempt from IP address 189.71.51.255 on Port 445(SMB)

Unauthorized connection attempt detected from IP address 31.154.232.106 to port 81 [J]

firewall-block, port(s): 2000/tcp

trying to access non-authorized port

...

Feb  3 14:29:55 grey postfix/smtpd\[18791\]: NOQUEUE: reject: RCPT from adsl-67.37.6.0.tellas.gr\[37.6.0.67\]: 554 5.7.1 Service unavailable\; Client host \[37.6.0.67\] blocked using cbl.abuseat.org\; Blocked - see http://www.abuseat.org/lookup.cgi\?ip=37.6.0.67\; from=\ to=\ proto=ESMTP helo=\
...

detected by Fail2Ban

Unauthorized connection attempt from IP address 223.227.21.56 on Port 445(SMB)

Feb  3 11:38:37 debian-2gb-nbg1-2 kernel: \[2985569.240233\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=92.246.76.253 DST=195.201.40.59 LEN=40 TOS=0x00 PREC=0x00 TTL=247 ID=35394 PROTO=TCP SPT=49123 DPT=3387 WINDOW=1024 RES=0x00 SYN URGP=0