Sep 16 23:09:53 web1 postfix/smtpd[22894]: warning: unknown[141.98.80.80]: SASL PLAIN authentication failed: authentication failure
...

Sep 14 18:32:50 mail postfix/smtpd\[6688\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 14 19:04:08 mail postfix/smtpd\[7435\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 14 19:04:15 mail postfix/smtpd\[7435\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 14 19:23:03 mail postfix/smtpd\[7899\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \

Sep 14 00:21:15 s1 postfix/submission/smtpd\[21563\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 14 00:21:22 s1 postfix/submission/smtpd\[21563\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 14 00:21:37 s1 postfix/submission/smtpd\[21563\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 14 00:21:44 s1 postfix/submission/smtpd\[22479\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 14 00:21:45 s1 postfix/submission/smtpd\[21563\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 14 00:22:06 s1 postfix/submission/smtpd\[22479\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 14 00:22:11 s1 postfix/submission/smtpd\[22475\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 14 00:22:31 s1 postfix/submission/smtpd\[22475\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 14 00:22:31 s1 postfix/submission/smtpd\[215

Sep 12 13:04:28 ncomp postfix/smtpd[3726]: warning: unknown[141.98.80.80]: SASL PLAIN authentication failed:
Sep 12 13:04:39 ncomp postfix/smtpd[3726]: warning: unknown[141.98.80.80]: SASL PLAIN authentication failed:
Sep 12 13:40:40 ncomp postfix/smtpd[4354]: warning: unknown[141.98.80.80]: SASL PLAIN authentication failed:

Sep 11 21:30:21 mail postfix/smtpd\[17518\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 11 21:30:31 mail postfix/smtpd\[18142\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 11 22:01:30 mail postfix/smtpd\[17395\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 11 22:01:39 mail postfix/smtpd\[13803\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \

Sep 11 01:28:23 vmanager6029 postfix/smtpd\[32289\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:
Sep 11 01:28:42 vmanager6029 postfix/smtpd\[32289\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed:

Sep 10 03:14:10 mail postfix/smtpd\[18325\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 10 03:14:23 mail postfix/smtpd\[18325\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 10 04:02:10 mail postfix/smtpd\[18988\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \
Sep 10 04:02:18 mail postfix/smtpd\[20587\]: warning: unknown\[141.98.80.80\]: SASL PLAIN authentication failed: \

2019-09-09 13:26:00 fixed_plain authenticator failed for \(\[141.98.80.80\]\) \[141.98.80.80\]: 535 Incorrect authentication data \(set_id=chris@thepuddles.net.nz\)
2019-09-09 13:26:05 fixed_plain authenticator failed for \(\[141.98.80.80\]\) \[141.98.80.80\]: 535 Incorrect authentication data \(set_id=chris\)
2019-09-09 14:48:15 fixed_plain authenticator failed for \(\[141.98.80.80\]\) \[141.98.80.80\]: 535 Incorrect authentication data \(set_id=hobo@thepuddles.net.nz\)
...

2019-09-0812:14:28dovecot_plainauthenticatorfailedfor\([141.98.80.80]\)[141.98.80.80]:52962:535Incorrectauthenticationdata\(set_id=alice@tpgs.ch\)2019-09-0812:14:36dovecot_plainauthenticatorfailedfor\([141.98.80.80]\)[141.98.80.80]:33408:535Incorrectauthenticationdata\(set_id=alice\)2019-09-0812:27:37dovecot_plainauthenticatorfailedfor\([141.98.80.80]\)[141.98.80.80]:8480:535Incorrectauthenticationdata\(set_id=giorgio@modesti.it\)2019-09-0812:27:45dovecot_plainauthenticatorfailedfor\([141.98.80.80]\)[141.98.80.80]:43308:535Incorrectauthenticationdata\(set_id=giorgio\)2019-09-0812:43:26dovecot_plainauthenticatorfailedfor\([141.98.80.80]\)[141.98.80.80]:21596:535Incorrectauthenticationdata\(set_id=aurelia@helcom.net\)2019-09-0812:43:34dovecot_plainauthenticatorfailedfor\([141.98.80.80]\)[141.98.80.80]:37078:535Incorrectauthenticationdata\(set_id=aurelia\)2019-09-0813:08:12dovecot_plainauthenticatorfailedfor\([141.98.80.80]\)[141.98.80.80]:27706:535Incorrectauthenticationdata\(set_id=dimlailildimlailil@panyluz.c

Sep  7 20:06:15 georgia postfix/smtpd[5751]: connect from unknown[141.98.80.80]
Sep  7 20:06:17 georgia postfix/smtpd[5751]: warning: unknown[141.98.80.80]: SASL PLAIN authentication failed: authentication failure
Sep  7 20:06:17 georgia postfix/smtpd[5751]: lost connection after AUTH from unknown[141.98.80.80]
Sep  7 20:06:17 georgia postfix/smtpd[5751]: disconnect from unknown[141.98.80.80] ehlo=1 auth=0/1 commands=1/2
Sep  7 20:06:17 georgia postfix/smtpd[6532]: connect from unknown[141.98.80.80]
Sep  7 20:06:18 georgia postfix/smtpd[6532]: warning: unknown[141.98.80.80]: SASL PLAIN authentication failed: authentication failure
Sep  7 20:06:19 georgia postfix/smtpd[6532]: lost connection after AUTH from unknown[141.98.80.80]
Sep  7 20:06:19 georgia postfix/smtpd[6532]: disconnect from unknown[141.98.80.80] ehlo=1 auth=0/1 commands=1/2
Sep  7 20:07:31 georgia postfix/smtpd[5751]: connect from unknown[141.98.80.80]
Sep  7 20:07:32 georgia postfix/smtpd[5751]: warning: ........
-------------------------------

Oct 13 20:36:42 mail postfix/smtpd\[2755\]: warning: unknown\[141.98.80.73\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 13 21:07:45 mail postfix/smtpd\[3739\]: warning: unknown\[141.98.80.73\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 13 21:08:05 mail postfix/smtpd\[3743\]: warning: unknown\[141.98.80.73\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 13 21:08:21 mail postfix/smtpd\[3743\]: warning: unknown\[141.98.80.73\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\

Oct 13 12:10:32 mail postfix/smtpd\[17486\]: warning: unknown\[141.98.80.73\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 13 12:10:52 mail postfix/smtpd\[17603\]: warning: unknown\[141.98.80.73\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 13 12:11:11 mail postfix/smtpd\[17486\]: warning: unknown\[141.98.80.73\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 13 12:42:04 mail postfix/smtpd\[18268\]: warning: unknown\[141.98.80.73\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\

2020-10-11 20:00:28 dovecot_login authenticator failed for \(\[141.98.80.72\]\) \[141.98.80.72\]: 535 Incorrect authentication data \(set_id=ben@benjaminhauck.com\)
2020-10-11 20:00:36 dovecot_login authenticator failed for \(\[141.98.80.72\]\) \[141.98.80.72\]: 535 Incorrect authentication data
2020-10-11 20:00:45 dovecot_login authenticator failed for \(\[141.98.80.72\]\) \[141.98.80.72\]: 535 Incorrect authentication data
2020-10-11 20:00:51 dovecot_login authenticator failed for \(\[141.98.80.72\]\) \[141.98.80.72\]: 535 Incorrect authentication data
2020-10-11 20:01:03 dovecot_login authenticator failed for \(\[141.98.80.72\]\) \[141.98.80.72\]: 535 Incorrect authentication data
...

Fail2Ban Ban Triggered

Brute Force attack - banned by Fail2Ban

[H1.VM1] Blocked by UFW

port scan hacking

Tried to scan TCP Port but the Antivirus refused. More than 20 times within a few months.

\x03 400 0 "-" "-"

Found on   Binary Defense     / proto=6  .  srcport=65528  .  dstport=53 DNS  .     (757)

Exim brute force attack (multiple auth failures).

UTC 10/08/2020 18:12:24 - 83 - Security Services - Alert - 141.98.80.22, 65534, X1 - xxx.xxx.xxx.xxx, 8651, X1 - tcp - TCP scanned port list, 8691, 8611, 8671, 8601, 8661, 8641, 8681, 8631, 8621, 8651 - Probable port scan detected

Oct  8 17:35:05 relay postfix/smtpd\[8860\]: warning: unknown\[141.98.80.190\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  8 17:35:26 relay postfix/smtpd\[4144\]: warning: unknown\[141.98.80.190\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  8 17:40:26 relay postfix/smtpd\[5072\]: warning: unknown\[141.98.80.190\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  8 17:40:45 relay postfix/smtpd\[4145\]: warning: unknown\[141.98.80.190\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  8 17:46:12 relay postfix/smtpd\[8861\]: warning: unknown\[141.98.80.190\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

scans 10 times in preceeding hours on the ports (in chronological order) 8601 8611 8621 8631 8641 8651 8661 8671 8681 8691

tcp port scan

SSH brute-force attempt

20/8/20@08:03:03: FAIL: Alarm-Network address from=175.181.178.63
20/8/20@08:03:03: FAIL: Alarm-Network address from=175.181.178.63
...

Unauthorized connection attempt from IP address 31.28.109.154 on Port 445(SMB)

sshd jail - ssh hack attempt

2020-08-20T11:59:13.285543abusebot-6.cloudsearch.cf sshd[5733]: Invalid user stock from 162.62.29.207 port 53408
2020-08-20T11:59:13.291191abusebot-6.cloudsearch.cf sshd[5733]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=162.62.29.207
2020-08-20T11:59:13.285543abusebot-6.cloudsearch.cf sshd[5733]: Invalid user stock from 162.62.29.207 port 53408
2020-08-20T11:59:15.346811abusebot-6.cloudsearch.cf sshd[5733]: Failed password for invalid user stock from 162.62.29.207 port 53408 ssh2
2020-08-20T12:03:16.869732abusebot-6.cloudsearch.cf sshd[5799]: Invalid user xyc from 162.62.29.207 port 55136
2020-08-20T12:03:16.875589abusebot-6.cloudsearch.cf sshd[5799]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=162.62.29.207
2020-08-20T12:03:16.869732abusebot-6.cloudsearch.cf sshd[5799]: Invalid user xyc from 162.62.29.207 port 55136
2020-08-20T12:03:18.625010abusebot-6.cloudsearch.cf sshd[5799]: Failed password fo
...

Unauthorized connection attempt from IP address 49.206.33.231 on Port 445(SMB)

Aug 20 15:16:48 powerpi2 sshd[2900]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=62.56.250.68
Aug 20 15:16:48 powerpi2 sshd[2900]: Invalid user openuser from 62.56.250.68 port 26650
Aug 20 15:16:51 powerpi2 sshd[2900]: Failed password for invalid user openuser from 62.56.250.68 port 26650 ssh2
...

Aug 20 18:23:10 minden010 sshd[22994]: Failed password for root from 54.38.241.162 port 33438 ssh2
Aug 20 18:29:25 minden010 sshd[25110]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=54.38.241.162
Aug 20 18:29:26 minden010 sshd[25110]: Failed password for invalid user marry from 54.38.241.162 port 51362 ssh2
...

Unauthorized connection attempt from IP address 86.123.232.189 on Port 445(SMB)

Unauthorized connection attempt from IP address 190.79.117.113 on Port 445(SMB)

 TCP (SYN) 172.105.89.161:57395 -> port 42424, len 44

SSH Brute-Forcing (server2)

2020-08-20 06:57:16.192035-0500  localhost smtpd[89038]: NOQUEUE: reject: RCPT from unknown[193.106.50.228]: 554 5.7.1 Service unavailable; Client host [193.106.50.228] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/193.106.50.228 / https://www.spamhaus.org/sbl/query/SBLCSS; from= to= proto=ESMTP helo=

Aug 20 14:36:18 haigwepa sshd[18636]: Failed password for root from 192.144.228.253 port 13052 ssh2
...

Unauthorized connection attempt from IP address 220.158.143.145 on Port 445(SMB)