🇺🇸
mnsf
2026-05-15 01:05:39
(1 month ago)
Request Overload (393)
Brute-Force
Web App Attack
🇵🇱
zmb.pl
2026-05-04 15:45:58
(1 month ago)
May 4 17:45:43 srv3 postfix/submission/smtpd\[19413\]: warning: unknown\[66.56.80.99\]: SASL PLAIN ...
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May 4 17:45:43 srv3 postfix/submission/smtpd\[19413\]: warning: unknown\[66.56.80.99\]: SASL PLAIN authentication failed:
May 4 17:45:49 srv3 postfix/submission/smtpd\[19413\]: warning: unknown\[66.56.80.99\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
May 4 17:45:56 srv3 postfix/smtps/smtpd\[18344\]: warning: unknown\[66.56.80.99\]: SASL PLAIN authentication failed:
...
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Email Spam
🇺🇸
bigscoots.com
2026-05-02 09:39:00
(1 month ago)
(smtpauth) Failed SMTP AUTH login from 66.56.80.99 (CA/Canada/-): 5 in the last 3600 secs; Ports: 25 ...
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(smtpauth) Failed SMTP AUTH login from 66.56.80.99 (CA/Canada/-): 5 in the last 3600 secs; Ports: 25,465,587; Direction: 0; Trigger: LF_SMTPAUTH; Logs: 2026-05-02 05:38:31 dovecot_plain authenticator failed for H=([10.5.18.56]) [66.56.80.99]:6908: 535 Incorrect authentication data ([email protected] )
2026-05-02 05:38:37 dovecot_login authenticator failed for H=([10.5.18.56]) [66.56.80.99]:6908: 535 Incorrect authentication data ([email protected] )
2026-05-02 05:38:43 dovecot_plain authenticator failed for H=([10.5.18.56]) [66.56.80.99]:57912: 535 Incorrect authentication data ([email protected] )
2026-05-02 05:38:49 dovecot_login authenticator failed for H=([10.5.18.56]) [66.56.80.99]:57912: 535 Incorrect authentication data ([email protected] )
2026-05-02 05:38:57 dovecot_plain authenticator failed for H=([10.5.18.56]) [66.56.80.99]:23005: 535 Incorrect authentication data ([email protected] )
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Brute-Force
SSH
2026-05-02 08:15:51
(1 month ago)
Kept connecting and disconnecting without issuing any commands
DDoS Attack
2026-05-02 06:06:42
(1 month ago)
Port scanning: unknown[66.56.80.99]
unknown[66.56.80.99]
unknown[66.56.80.99]
Brute-Force
🇮🇳
evicky2002
2026-05-02 06:00:00
(1 month ago)
Confirmed malicious by STILWaters CTI platform (score=90, sources=1)
Hacking
Brute-Force
SSH
🇺🇸
Smee
2026-05-02 05:48:55
(1 month ago)
IMAP/SMTP Authentication Failure
Brute-Force
2026-05-02 05:15:54
(1 month ago)
(smtpauth) Failed SMTP AUTH login from 66.56.80.99 (CA/Canada/-)
Brute-Force
🇦🇺
jalim
2026-05-02 05:15:12
(1 month ago)
Fail2Ban (11cc81a08e1b): 3 attempts from 66.56.80.99 triggered postfix-sasl jail. Ban time: 3600s. A ...
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Fail2Ban (11cc81a08e1b): 3 attempts from 66.56.80.99 triggered postfix-sasl jail. Ban time: 3600s. Attack patterns detected in mail server logs.
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Brute-Force
🇭🇺
Lacika555
2026-05-02 05:11:35
(1 month ago)
RdpGuard detected brute-force attempt on SMTP
Brute-Force
2026-05-02 04:50:16
(1 month ago)
2026-05-02T06:49:58.057473+02:00 postfix/smtpd[398489]: warning: unknown[66.56.80.99]: SASL CRAM-MD ...
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2026-05-02T06:49:58.057473+02:00 postfix/smtpd[398489]: warning: unknown[66.56.80.99]: SASL CRAM-MD5 authentication failed: (reason unavailable), 2026-05-02T06:50:04.173567+02:00 postfix/smtpd[398489]: warning: unknown[66.56.80.99]: SASL PLAIN authentication failed: (reason unavailable), 2026-05-02T06:50:14.411648+02:00 postfix/smtpd[398489]: warning: unknown[66.56.80.99]: SASL LOGIN authentication failed: (reason unavailable),
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Email Spam
Brute-Force
🇺🇸
bigscoots.com
2026-05-02 01:52:17
(1 month ago)
(smtpauth) Failed SMTP AUTH login from 66.56.80.99 (CA/Canada/-): 5 in the last 3600 secs; Ports: 25 ...
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(smtpauth) Failed SMTP AUTH login from 66.56.80.99 (CA/Canada/-): 5 in the last 3600 secs; Ports: 25,465,587; Direction: 0; Trigger: LF_SMTPAUTH; Logs: 2026-05-01 21:51:32 dovecot_plain authenticator failed for H=([10.5.18.56]) [66.56.80.99]:45084: 535 Incorrect authentication data ([email protected] )
2026-05-01 21:51:38 dovecot_login authenticator failed for H=([10.5.18.56]) [66.56.80.99]:45084: 535 Incorrect authentication data ([email protected] )
2026-05-01 21:51:44 dovecot_plain authenticator failed for H=([10.5.18.56]) [66.56.80.99]:27283: 535 Incorrect authentication data ([email protected] )
2026-05-01 21:51:50 dovecot_login authenticator failed for H=([10.5.18.56]) [66.56.80.99]:27283: 535 Incorrect authentication data ([email protected] )
2026-05-01 21:52:13 dovecot_plain authenticator failed for H=([10.5.18.56]) [66.56.80.99]:23122: 535 Incorrect authentication data ([email protected] )
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Brute-Force
SSH
🇷🇸
Smel
2026-05-02 01:19:26
(1 month ago)
Mail/25/465/587-993/995 Probe, Reject, BadAuth, Hack, SPAM -
Email Spam
Hacking
Brute-Force
🇳🇱
WeCloudit-Anti-Abuse
2026-05-02 00:40:31
(1 month ago)
(smtpauth) Failed SMTP AUTH login from 66.56.80.99 (CA/Canada/-): 15 in the last 200 secs; Ports: *; ...
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(smtpauth) Failed SMTP AUTH login from 66.56.80.99 (CA/Canada/-): 15 in the last 200 secs; Ports: *; Direction: 0; Trigger: LF_SMTPAUTH - server02
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Brute-Force
SSH
2026-05-02 00:17:28
(1 month ago)
2026-05-02T02:17:08.019726+02:00 postfix/smtpd[321799]: warning: unknown[66.56.80.99]: SASL CRAM-MD ...
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2026-05-02T02:17:08.019726+02:00 postfix/smtpd[321799]: warning: unknown[66.56.80.99]: SASL CRAM-MD5 authentication failed: (reason unavailable), 2026-05-02T02:17:14.144739+02:00 postfix/smtpd[321799]: warning: unknown[66.56.80.99]: SASL PLAIN authentication failed: (reason unavailable), 2026-05-02T02:17:24.388048+02:00 postfix/smtpd[321799]: warning: unknown[66.56.80.99]: SASL LOGIN authentication failed: (reason unavailable),
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Email Spam
Brute-Force