Oct 30 04:26:46 h2421860 postfix/postscreen[3086]: CONNECT from [185.208.211.165]:54382 to [85.214.119.52]:25
Oct 30 04:26:46 h2421860 postfix/dnsblog[3089]: addr 185.208.211.165 listed by domain zen.spamhaus.org as 127.0.0.11
Oct 30 04:26:46 h2421860 postfix/postscreen[3086]: CONNECT from [185.208.211.165]:54384 to [85.214.119.52]:25
Oct 30 04:26:46 h2421860 postfix/dnsblog[3096]: addr 185.208.211.165 listed by domain Unknown.trblspam.com as 185.53.179.7
Oct 30 04:26:46 h2421860 postfix/dnsblog[3091]: addr 185.208.211.165 listed by domain b.barracudacentral.org as 127.0.0.2
Oct 30 04:26:46 h2421860 postfix/dnsblog[3095]: addr 185.208.211.165 listed by domain dnsbl.sorbs.net as 127.0.0.6
Oct 30 04:26:52 h2421860 postfix/postscreen[3086]: DNSBL rank 7 for [185.208.211.165]:54382
Oct 30 04:26:52 h2421860 postfix/postscreen[3086]: DNSBL rank 7 for [185.208.211.165]:54384
Oct x@x
Oct x@x
Oct 30 04:26:52 h2421860 postfix/postscreen[3086]: DISCONNECT [185.208.211.165]:54384
O........
-------------------------------

2020-04-08T14:38:09.465964+02:00 lumpi kernel: [11639256.255676] INPUT:DROP:SPAMHAUS_EDROP:IN=eth0 OUT= MAC=52:54:a2:01:a5:04:d2:74:7f:6e:37:e3:08:00 SRC=185.208.211.65 DST=78.46.199.189 LEN=52 TOS=0x00 PREC=0x00 TTL=111 ID=12507 DF PROTO=TCP SPT=58202 DPT=445 WINDOW=8192 RES=0x00 SYN URGP=0 
...

Jan 14 23:15:41 mx2 postfix/smtpd\[2561\]: NOQUEUE: reject: RCPT from unknown\[185.208.211.254\]: 554 5.7.1 \: Relay access denied\; from=\ to=\ proto=ESMTP helo=\
Jan 14 23:15:41 mx2 postfix/smtpd\[2563\]: NOQUEUE: reject: RCPT from unknown\[185.208.211.254\]: 554 5.7.1 \: Relay access denied\; from=\ to=\ proto=ESMTP helo=\
Jan 14 23:15:42 mx2 postfix/smtpd\[2561\]: NOQUEUE: reject: RCPT from unknown\[185.208.211.254\]: 554 5.7.1 \: Relay access denied\; from=\ to=\ proto=ESMTP helo=\

2019-12-17 18:27:27 no host name found for IP address 185.208.211.86
2019-12-17 18:27:28 no host name found for IP address 185.208.211.86
2019-12-17 18:27:43 no host name found for IP address 185.208.211.86
2019-12-17 18:27:58 no host name found for IP address 185.208.211.86
2019-12-17 18:28:13 no host name found for IP address 185.208.211.86
2019-12-17 18:28:28 no host name found for IP address 185.208.211.86
2019-12-17 18:28:43 no host name found for IP address 185.208.211.86
2019-12-17 18:28:58 no host name found for IP address 185.208.211.86
2019-12-17 18:29:13 no host name found for IP address 185.208.211.86
2019-12-17 18:29:28 no host name found for IP address 185.208.211.86
2019-12-17 18:29:43 no host name found for IP address 185.208.211.86
2019-12-17 18:29:58 no host name found for IP address 185.208.211.86
2019-12-17 18:30:13 no host name found for IP address 185.208.211.86
2019-12-17 18:30:28 no host name found for IP address 185.208.211.86
2019-12-17 18:30:43........
------------------------------

2019-12-17 20:09:50 no host name found for IP address 185.208.211.234
2019-12-17 20:09:50 no host name found for IP address 185.208.211.234
2019-12-17 20:10:05 no host name found for IP address 185.208.211.234
2019-12-17 20:10:20 no host name found for IP address 185.208.211.234
2019-12-17 20:10:35 no host name found for IP address 185.208.211.234
2019-12-17 20:10:50 no host name found for IP address 185.208.211.234
2019-12-17 20:11:05 no host name found for IP address 185.208.211.234
2019-12-17 20:11:20 no host name found for IP address 185.208.211.234
2019-12-17 20:11:35 no host name found for IP address 185.208.211.234
2019-12-17 20:11:50 no host name found for IP address 185.208.211.234
2019-12-17 20:12:05 no host name found for IP address 185.208.211.234
2019-12-17 20:12:20 no host name found for IP address 185.208.211.234
2019-12-17 20:12:35 no host name found for IP address 185.208.211.234
2019-12-17 20:12:50 no host name found for IP address 185.208.211.234
2019-........
------------------------------

(smtpauth) Failed SMTP AUTH login from 185.208.211.90 (US/United States/-): 5 in the last 3600 secs

f2b trigger Multiple SASL failures

Dec  6 06:58:30 mx2 postfix/smtpd\[11081\]: NOQUEUE: reject: RCPT from unknown\[185.208.211.139\]: 554 5.7.1 \: Relay access denied\; from=\ to=\ proto=ESMTP helo=\
Dec  6 06:58:30 mx2 postfix/smtpd\[11081\]: NOQUEUE: reject: RCPT from unknown\[185.208.211.139\]: 554 5.7.1 \: Relay access denied\; from=\ to=\ proto=ESMTP helo=\
Dec  6 06:58:31 mx2 postfix/smtpd\[11081\]: NOQUEUE: reject: RCPT from unknown\[185.208.211.139\]: 554 5.7.1 \: Relay access denied\; from=\<948.pcondron@co.za\> to=\ proto=ESMTP helo=\

Dec  5 15:55:14 mail postfix/smtpd[22409]: warning: unknown[185.208.211.139]: SASL login authentication failed: UGFzc3dvcmQ6
Dec  5 15:55:21 mail postfix/smtpd[22336]: warning: unknown[185.208.211.139]: SASL login authentication failed: UGFzc3dvcmQ6
Dec  5 15:55:31 mail postfix/smtpd[22399]: warning: unknown[185.208.211.139]: SASL login authentication failed: UGFzc3dvcmQ6

Dec  4 19:25:10 naboo postfix/smtpd[3920]: connect from unknown[185.208.211.216]
Dec  4 19:25:11 naboo postfix/smtpd[3920]: NOQUEUE: reject: RCPT from unknown[185.208.211.216]: 504 5.5.2 : Helo command rejected: need fully-qualified hostname; from= to= proto=ESMTP helo=
Dec  4 19:25:11 naboo postfix/smtpd[3920]: lost connection after RCPT from unknown[185.208.211.216]
Dec  4 19:25:11 naboo postfix/smtpd[3920]: disconnect from unknown[185.208.211.216] ehlo=1 mail=1 rcpt=0/1 commands=2/3

Dec  2 07:50:45 localhost postfix/smtpd\[3589\]: warning: unknown\[185.208.211.139\]: SASL login authentication failed: UGFzc3dvcmQ6
Dec  2 07:50:52 localhost postfix/smtpd\[3589\]: warning: unknown\[185.208.211.139\]: SASL login authentication failed: UGFzc3dvcmQ6
Dec  2 07:51:03 localhost postfix/smtpd\[3589\]: warning: unknown\[185.208.211.139\]: SASL login authentication failed: UGFzc3dvcmQ6
Dec  2 07:51:28 localhost postfix/smtpd\[3589\]: warning: unknown\[185.208.211.139\]: SASL login authentication failed: UGFzc3dvcmQ6
Dec  2 07:51:35 localhost postfix/smtpd\[3589\]: warning: unknown\[185.208.211.139\]: SASL login authentication failed: UGFzc3dvcmQ6
...

SMTPAttack

Nov 29 16:12:33 andromeda postfix/smtpd\[52775\]: warning: unknown\[185.208.211.53\]: SASL login authentication failed: authentication failure
Nov 29 16:12:34 andromeda postfix/smtpd\[52778\]: warning: unknown\[185.208.211.53\]: SASL login authentication failed: authentication failure
Nov 29 16:12:35 andromeda postfix/smtpd\[52775\]: warning: unknown\[185.208.211.53\]: SASL login authentication failed: authentication failure
Nov 29 16:12:36 andromeda postfix/smtpd\[53417\]: warning: unknown\[185.208.211.53\]: SASL login authentication failed: authentication failure
Nov 29 16:12:37 andromeda postfix/smtpd\[52778\]: warning: unknown\[185.208.211.53\]: SASL login authentication failed: authentication failure

Nov 28 08:19:17 mx2 postfix/smtpd\[1726\]: NOQUEUE: reject: RCPT from unknown\[185.208.211.140\]: 554 5.7.1 \: Relay access denied\; from=\ to=\ proto=ESMTP helo=\
Nov 28 08:19:18 mx2 postfix/smtpd\[1726\]: NOQUEUE: reject: RCPT from unknown\[185.208.211.140\]: 554 5.7.1 \: Relay access denied\; from=\<948.pcondron@co.za\> to=\ proto=ESMTP helo=\
Nov 28 08:19:19 mx2 postfix/smtpd\[1726\]: NOQUEUE: reject: RCPT from unknown\[185.208.211.140\]: 554 5.7.1 \: Relay access denied\; from=\<3vrgfqblaepzfoieznbfntmrpqyix@co.za\> to=\ proto=ESMTP helo=\

Nov 27 01:24:30 web1 postfix/smtpd[13698]: warning: unknown[185.208.211.53]: SASL login authentication failed: authentication failure
...

2019-11-27 00:32:51 H=(WIN-A3D4D4NMA27) [185.208.211.47] F= rejected RCPT : relay not permitted
2019-11-27 00:32:51 H=(WIN-A3D4D4NMA27) [185.208.211.47] F=<948.pcondron@lerctr.org> rejected RCPT : relay not permitted
2019-11-27 00:32:52 H=(WIN-A3D4D4NMA27) [185.208.211.47] F=<3vrgfqblaepzfoieznbfntmrpqyix@lerctr.org> rejected RCPT : relay not permitted
...

Aug 28 15:25:59 lcdev sshd\[7967\]: Invalid user tillid from 218.241.134.34
Aug 28 15:25:59 lcdev sshd\[7967\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.241.134.34
Aug 28 15:26:01 lcdev sshd\[7967\]: Failed password for invalid user tillid from 218.241.134.34 port 34744 ssh2
Aug 28 15:29:53 lcdev sshd\[8378\]: Invalid user roberto from 218.241.134.34
Aug 28 15:29:53 lcdev sshd\[8378\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.241.134.34

SSH/22 MH Probe, BF, Hack -

Aug 28 19:06:16 kapalua sshd\[31746\]: Invalid user no1 from 79.7.207.99
Aug 28 19:06:16 kapalua sshd\[31746\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=host99-207-static.7-79-b.business.telecomitalia.it
Aug 28 19:06:18 kapalua sshd\[31746\]: Failed password for invalid user no1 from 79.7.207.99 port 55270 ssh2
Aug 28 19:10:38 kapalua sshd\[32291\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=host99-207-static.7-79-b.business.telecomitalia.it  user=root
Aug 28 19:10:40 kapalua sshd\[32291\]: Failed password for root from 79.7.207.99 port 60603 ssh2

[Aegis] @ 2019-08-29 00:43:14  0100 -> Attempted Administrator Privilege Gain: ET SCAN LibSSH Based Frequent SSH Connections Likely BruteForce Attack

Aug 29 10:54:42 nextcloud sshd\[22945\]: Invalid user mika from 201.89.50.221
Aug 29 10:54:42 nextcloud sshd\[22945\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=201.89.50.221
Aug 29 10:54:44 nextcloud sshd\[22945\]: Failed password for invalid user mika from 201.89.50.221 port 33522 ssh2
...

Aug 28 22:47:19 hcbb sshd\[5998\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.210  user=root
Aug 28 22:47:21 hcbb sshd\[5998\]: Failed password for root from 218.92.0.210 port 48952 ssh2
Aug 28 22:48:00 hcbb sshd\[6088\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.210  user=root
Aug 28 22:48:01 hcbb sshd\[6088\]: Failed password for root from 218.92.0.210 port 16814 ssh2
Aug 28 22:48:38 hcbb sshd\[6132\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.210  user=root

Brute force SMTP login attempted.
...

Aug 29 10:46:52 rpi sshd[6959]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.218.241.91 
Aug 29 10:46:54 rpi sshd[6959]: Failed password for invalid user tolarian from 103.218.241.91 port 50592 ssh2

Aug 28 22:57:12 sachi sshd\[31778\]: Invalid user wxl from 212.109.197.113
Aug 28 22:57:12 sachi sshd\[31778\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=vps.lptrader.ru
Aug 28 22:57:14 sachi sshd\[31778\]: Failed password for invalid user wxl from 212.109.197.113 port 54602 ssh2
Aug 28 23:01:14 sachi sshd\[32101\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=vps.lptrader.ru  user=root
Aug 28 23:01:15 sachi sshd\[32101\]: Failed password for root from 212.109.197.113 port 41590 ssh2

Brute force SMTP login attempted.
...

Multiport scan : 16 ports scanned 2179 2183 2187 2189 2190 2191 2195 2197 2201 2202 2205 2208 2209 2210 2211 2218

Aug 28 22:33:03 lcprod sshd\[24649\]: Invalid user laurenz from 159.89.230.141
Aug 28 22:33:03 lcprod sshd\[24649\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.89.230.141
Aug 28 22:33:05 lcprod sshd\[24649\]: Failed password for invalid user laurenz from 159.89.230.141 port 52174 ssh2
Aug 28 22:39:13 lcprod sshd\[25324\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.89.230.141  user=root
Aug 28 22:39:15 lcprod sshd\[25324\]: Failed password for root from 159.89.230.141 port 40740 ssh2

Aug 29 04:27:46 Tower sshd[32764]: Connection from 51.254.57.17 port 39530 on 192.168.10.220 port 22
Aug 29 04:27:47 Tower sshd[32764]: Invalid user radio from 51.254.57.17 port 39530
Aug 29 04:27:47 Tower sshd[32764]: error: Could not get shadow information for NOUSER
Aug 29 04:27:47 Tower sshd[32764]: Failed password for invalid user radio from 51.254.57.17 port 39530 ssh2
Aug 29 04:27:47 Tower sshd[32764]: Received disconnect from 51.254.57.17 port 39530:11: Bye Bye [preauth]
Aug 29 04:27:47 Tower sshd[32764]: Disconnected from invalid user radio 51.254.57.17 port 39530 [preauth]

Aug 29 01:43:25 MK-Soft-Root1 sshd\[15872\]: Invalid user beeidigung from 210.14.69.76 port 56174
Aug 29 01:43:25 MK-Soft-Root1 sshd\[15872\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=210.14.69.76
Aug 29 01:43:28 MK-Soft-Root1 sshd\[15872\]: Failed password for invalid user beeidigung from 210.14.69.76 port 56174 ssh2
...

[Aegis] @ 2019-08-29 08:42:57  0100 -> Possible attack on the ssh server (or version gathering).