2020-05-07T19:18:12.838374scrat postfix/smtpd[3588456]: NOQUEUE: reject: RCPT from unknown[103.44.13.246]: 450 4.7.25 Client host rejected: cannot find your hostname, [103.44.13.246]; from= to= proto=ESMTP helo=<2cd.us>
2020-05-07T19:18:14.031213scrat postfix/smtpd[3588456]: NOQUEUE: reject: RCPT from unknown[103.44.13.246]: 450 4.7.25 Client host rejected: cannot find your hostname, [103.44.13.246]; from= to= proto=ESMTP helo=<2cd.us>
2020-05-07T19:18:15.209980scrat postfix/smtpd[3588456]: NOQUEUE: reject: RCPT from unknown[103.44.13.246]: 450 4.7.25 Client host rejected: cannot find your hostname, [103.44.13.246]; from= to= proto=ESMTP helo=<2cd.us>
2020-05-07T19:18:16.378713scrat postfix/smtpd[3588456]: NOQUEUE: reject: RCPT from unknown[103.44.13.246]: 450 4.7.25 Client host rejected: cannot find your hostname, [103.44.13.246]; from= to=

postfix

email spam

proto=tcp  .  spt=48682  .  dpt=25  .     (listed on     Github Combined on 3 lists )     (277)

"Account brute force using dictionary attack against Exchange Online"

1576132051 - 12/12/2019 07:27:31 Host: 103.44.138.14/103.44.138.14 Port: 445 TCP Blocked

Jul 19 07:35:43 animalibera sshd[21333]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44  user=www-data
Jul 19 07:35:45 animalibera sshd[21333]: Failed password for www-data from 103.44.132.44 port 60640 ssh2
...

Mar 24 17:00:05 vtv3 sshd\[17397\]: Invalid user fei from 103.44.132.44 port 45674
Mar 24 17:00:05 vtv3 sshd\[17397\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44
Mar 24 17:00:07 vtv3 sshd\[17397\]: Failed password for invalid user fei from 103.44.132.44 port 45674 ssh2
Mar 24 17:04:05 vtv3 sshd\[19006\]: Invalid user osadrc from 103.44.132.44 port 58088
Mar 24 17:04:05 vtv3 sshd\[19006\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44
Mar 30 04:26:03 vtv3 sshd\[27494\]: Invalid user yr from 103.44.132.44 port 52532
Mar 30 04:26:03 vtv3 sshd\[27494\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44
Mar 30 04:26:05 vtv3 sshd\[27494\]: Failed password for invalid user yr from 103.44.132.44 port 52532 ssh2
Mar 30 04:34:56 vtv3 sshd\[30681\]: Invalid user write from 103.44.132.44 port 47708
Mar 30 04:34:56 vtv3 sshd\[30681\]: pam_unix\(sshd

Mar 24 17:00:05 vtv3 sshd\[17397\]: Invalid user fei from 103.44.132.44 port 45674
Mar 24 17:00:05 vtv3 sshd\[17397\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44
Mar 24 17:00:07 vtv3 sshd\[17397\]: Failed password for invalid user fei from 103.44.132.44 port 45674 ssh2
Mar 24 17:04:05 vtv3 sshd\[19006\]: Invalid user osadrc from 103.44.132.44 port 58088
Mar 24 17:04:05 vtv3 sshd\[19006\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44
Mar 30 04:26:03 vtv3 sshd\[27494\]: Invalid user yr from 103.44.132.44 port 52532
Mar 30 04:26:03 vtv3 sshd\[27494\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44
Mar 30 04:26:05 vtv3 sshd\[27494\]: Failed password for invalid user yr from 103.44.132.44 port 52532 ssh2
Mar 30 04:34:56 vtv3 sshd\[30681\]: Invalid user write from 103.44.132.44 port 47708
Mar 30 04:34:56 vtv3 sshd\[30681\]: pam_unix\(sshd

Jul 13 18:37:34 mail sshd\[7826\]: Invalid user webuser from 103.44.132.44 port 45200
Jul 13 18:37:34 mail sshd\[7826\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44
Jul 13 18:37:35 mail sshd\[7826\]: Failed password for invalid user webuser from 103.44.132.44 port 45200 ssh2
Jul 13 18:41:40 mail sshd\[8650\]: Invalid user michael from 103.44.132.44 port 56902
Jul 13 18:41:40 mail sshd\[8650\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44

Jul  5 01:57:10 unicornsoft sshd\[14937\]: Invalid user user from 103.44.132.44
Jul  5 01:57:10 unicornsoft sshd\[14937\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44
Jul  5 01:57:11 unicornsoft sshd\[14937\]: Failed password for invalid user user from 103.44.132.44 port 49644 ssh2

Jul  4 20:42:57 lnxmysql61 sshd[23667]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44
Jul  4 20:42:57 lnxmysql61 sshd[23667]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44

Automated report - ssh fail2ban:
Jul 3 18:33:35 authentication failure 
Jul 3 18:33:37 wrong password, user=angus, port=50950, ssh2
Jul 3 19:05:20 authentication failure

Jul  3 09:12:24 ip-172-31-62-245 sshd\[27881\]: Invalid user speedtest from 103.44.132.44\
Jul  3 09:12:26 ip-172-31-62-245 sshd\[27881\]: Failed password for invalid user speedtest from 103.44.132.44 port 54840 ssh2\
Jul  3 09:14:56 ip-172-31-62-245 sshd\[27903\]: Invalid user gitblit from 103.44.132.44\
Jul  3 09:14:58 ip-172-31-62-245 sshd\[27903\]: Failed password for invalid user gitblit from 103.44.132.44 port 46242 ssh2\
Jul  3 09:17:24 ip-172-31-62-245 sshd\[27931\]: Invalid user um from 103.44.132.44\

Jul  2 23:55:47 localhost sshd\[8404\]: Invalid user weng123 from 103.44.132.44 port 58594
Jul  2 23:55:47 localhost sshd\[8404\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44
Jul  2 23:55:49 localhost sshd\[8404\]: Failed password for invalid user weng123 from 103.44.132.44 port 58594 ssh2
Jul  2 23:57:42 localhost sshd\[8473\]: Invalid user 123 from 103.44.132.44 port 48808
Jul  2 23:57:42 localhost sshd\[8473\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44
...

Jul  3 00:03:36 localhost sshd\[43407\]: Invalid user aaa from 103.44.132.44 port 60032
Jul  3 00:03:36 localhost sshd\[43407\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44
...

Jun 28 05:16:40 MK-Soft-VM5 sshd\[15877\]: Invalid user napporn from 103.44.132.44 port 53076
Jun 28 05:16:40 MK-Soft-VM5 sshd\[15877\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44
Jun 28 05:16:42 MK-Soft-VM5 sshd\[15877\]: Failed password for invalid user napporn from 103.44.132.44 port 53076 ssh2
...

Jun 27 06:29:29 h2177944 sshd\[16398\]: Invalid user zhanghua from 103.44.132.44 port 51534
Jun 27 06:29:29 h2177944 sshd\[16398\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44
Jun 27 06:29:31 h2177944 sshd\[16398\]: Failed password for invalid user zhanghua from 103.44.132.44 port 51534 ssh2
Jun 27 06:31:17 h2177944 sshd\[16548\]: Invalid user sagittaire from 103.44.132.44 port 46238
Jun 27 06:31:17 h2177944 sshd\[16548\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44
...

Jun 26 14:02:46 vps200512 sshd\[11784\]: Invalid user bao from 103.44.132.44
Jun 26 14:02:46 vps200512 sshd\[11784\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44
Jun 26 14:02:48 vps200512 sshd\[11784\]: Failed password for invalid user bao from 103.44.132.44 port 42852 ssh2
Jun 26 14:04:13 vps200512 sshd\[11806\]: Invalid user gordon from 103.44.132.44
Jun 26 14:04:13 vps200512 sshd\[11806\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.132.44

" "

Oct  6 12:34:59 vmanager6029 sshd\[16565\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=185.53.229.10  user=root
Oct  6 12:35:01 vmanager6029 sshd\[16565\]: Failed password for root from 185.53.229.10 port 60181 ssh2
Oct  6 12:38:49 vmanager6029 sshd\[16611\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=185.53.229.10  user=root

2019-10-06T08:26:12.712356tmaserv sshd\[27482\]: Failed password for invalid user 2019@Admin from 122.199.152.114 port 11379 ssh2
2019-10-06T08:43:23.403804tmaserv sshd\[28196\]: Invalid user 321Ewq from 122.199.152.114 port 31634
2019-10-06T08:43:23.409622tmaserv sshd\[28196\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=122.199.152.114
2019-10-06T08:43:25.095965tmaserv sshd\[28196\]: Failed password for invalid user 321Ewq from 122.199.152.114 port 31634 ssh2
2019-10-06T08:47:39.324985tmaserv sshd\[28383\]: Invalid user Pierre2016 from 122.199.152.114 port 50820
2019-10-06T08:47:39.327809tmaserv sshd\[28383\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=122.199.152.114
...

Oct  6 05:06:44 thevastnessof sshd[17242]: Failed password for root from 46.175.243.9 port 36098 ssh2
...

Oct  6 05:43:27 localhost postfix/smtpd\[20186\]: warning: unknown\[103.219.154.9\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  6 05:43:35 localhost postfix/smtpd\[20186\]: warning: unknown\[103.219.154.9\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  6 05:43:46 localhost postfix/smtpd\[20186\]: warning: unknown\[103.219.154.9\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  6 05:44:01 localhost postfix/smtpd\[20182\]: warning: unknown\[103.219.154.9\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  6 05:44:07 localhost postfix/smtpd\[20186\]: warning: unknown\[103.219.154.9\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

Brute force attack to crack SMTP password (port 25 / 587)

Oct  6 11:37:40 heissa sshd\[27715\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=110.80.17.26  user=root
Oct  6 11:37:42 heissa sshd\[27715\]: Failed password for root from 110.80.17.26 port 44698 ssh2
Oct  6 11:41:23 heissa sshd\[28341\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=110.80.17.26  user=root
Oct  6 11:41:25 heissa sshd\[28341\]: Failed password for root from 110.80.17.26 port 33820 ssh2
Oct  6 11:45:08 heissa sshd\[28922\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=110.80.17.26  user=root

Tried sshing with brute force.

Automatic report - Port Scan Attack

Oct  6 08:07:16 SilenceServices sshd[24646]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=54.39.29.105
Oct  6 08:07:18 SilenceServices sshd[24646]: Failed password for invalid user Motdepasse!234 from 54.39.29.105 port 39578 ssh2
Oct  6 08:10:56 SilenceServices sshd[25722]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=54.39.29.105

Oct  6 01:15:41 hpm sshd\[4458\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.65.18  user=root
Oct  6 01:15:43 hpm sshd\[4458\]: Failed password for root from 106.13.65.18 port 58100 ssh2
Oct  6 01:20:27 hpm sshd\[4884\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.65.18  user=root
Oct  6 01:20:29 hpm sshd\[4884\]: Failed password for root from 106.13.65.18 port 43420 ssh2
Oct  6 01:25:20 hpm sshd\[5298\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.65.18  user=root

Oct  6 05:55:32 s64-1 sshd[7429]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=186.122.149.85
Oct  6 05:55:34 s64-1 sshd[7429]: Failed password for invalid user Louisiana2017 from 186.122.149.85 port 50280 ssh2
Oct  6 06:00:38 s64-1 sshd[7473]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=186.122.149.85
...

Oct  6 11:41:43 vpn01 sshd[14682]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=18.18.248.17
Oct  6 11:41:45 vpn01 sshd[14682]: Failed password for invalid user adrienne from 18.18.248.17 port 19220 ssh2
...

$f2bV_matches

Oct  6 07:26:12 localhost sshd\[49070\]: Invalid user Chicken@123 from 45.55.38.39 port 50549
Oct  6 07:26:12 localhost sshd\[49070\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=45.55.38.39
Oct  6 07:26:14 localhost sshd\[49070\]: Failed password for invalid user Chicken@123 from 45.55.38.39 port 50549 ssh2
Oct  6 07:30:19 localhost sshd\[49217\]: Invalid user Jelszo from 45.55.38.39 port 42237
Oct  6 07:30:19 localhost sshd\[49217\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=45.55.38.39
...