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🇬🇧
consul.to
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Web attack/malicious scanning detected
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Web App Attack
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🇺🇸
bigscoots.com
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(smtpauth) Failed SMTP AUTH login from 91.193.6.154 (CA/Canada/-): 5 in the last 3600 secs; Ports: 2 ...
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(smtpauth) Failed SMTP AUTH login from 91.193.6.154 (CA/Canada/-): 5 in the last 3600 secs; Ports: 25,465,587; Direction: 0; Trigger: LF_SMTPAUTH; Logs: 2026-04-23 10:14:42 dovecot_plain authenticator failed for H=([10.24.247.210]) [91.193.6.154]:16170: 535 Incorrect authentication data ([email protected])
2026-04-23 10:14:48 dovecot_login authenticator failed for H=([10.24.247.210]) [91.193.6.154]:16170: 535 Incorrect authentication data ([email protected])
2026-04-23 10:14:55 dovecot_plain authenticator failed for H=([10.24.247.210]) [91.193.6.154]:10794: 535 Incorrect authentication data ([email protected])
2026-04-23 10:14:57 dovecot_login authenticator failed for H=([10.24.247.210]) [91.193.6.154]:10794: 535 Incorrect authentication data ([email protected])
2026-04-23 10:15:06 dovecot_plain authenticator failed for H=([10.24.247.210]) [91.193.6.154]:22916: 535 Incorrect authentication data ([email protected])
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Brute-Force
SSH
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Anonymous
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2026-04-23T06:28:03.715123-07:00 gremlin auth: pam_unix(dovecot:auth): authentication failure; logna ...
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2026-04-23T06:28:03.715123-07:00 gremlin auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=cheryl rhost=91.193.6.154 user=cheryl
2026-04-23T06:28:12.663724-07:00 gremlin auth: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=cheryl rhost=91.193.6.154 user=cheryl
...
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Brute-Force
SSH
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🇦🇺
screwlooseit.com.au
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Blocked by CSF 13 firewall - Rule: mysaslmatch
RO/Romania/-
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Web App Attack
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🇬🇧
chrisw
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Apr 12 09:27:51 l03 postfix/smtpd[27522]: warning: unknown[91.193.6.154]: SASL PLAIN authentication ...
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Apr 12 09:27:51 l03 postfix/smtpd[27522]: warning: unknown[91.193.6.154]: SASL PLAIN authentication failed: authentication failure
Apr 12 09:27:54 l03 postfix/smtpd[27522]: warning: unknown[91.193.6.154]: SASL LOGIN authentication failed: authentication failure
Apr 12 09:27:57 l03 postfix/smtps/smtpd[27491]: warning: unknown[91.193.6.154]: SASL PLAIN authentication failed: authentication failure
Apr 12 09:27:59 l03 postfix/smtps/smtpd[27491]: warning: unknown[91.193.6.154]: SASL LOGIN authentication failed: authentication failure
...
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Web Spam
Brute-Force
Exploited Host
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🇩🇪
FeG Deutschland
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Mail: - login with unknown user - bruteforce
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Brute-Force
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🇺🇸
bigscoots.com
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(smtpauth) Failed SMTP AUTH login from 91.193.6.154 (CA/Canada/-): 5 in the last 3600 secs; Ports: 2 ...
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(smtpauth) Failed SMTP AUTH login from 91.193.6.154 (CA/Canada/-): 5 in the last 3600 secs; Ports: 25,465,587; Direction: 0; Trigger: LF_SMTPAUTH; Logs: 2026-03-24 01:02:21 dovecot_plain authenticator failed for H=([10.24.18.8]) [91.193.6.154]:25136: 535 Incorrect authentication data ([email protected])
2026-03-24 01:02:27 dovecot_login authenticator failed for H=([10.24.18.8]) [91.193.6.154]:25136: 535 Incorrect authentication data ([email protected])
2026-03-24 01:02:33 dovecot_plain authenticator failed for H=([10.24.18.8]) [91.193.6.154]:39735: 535 Incorrect authentication data ([email protected])
2026-03-24 01:02:39 dovecot_login authenticator failed for H=([10.24.18.8]) [91.193.6.154]:39735: 535 Incorrect authentication data ([email protected])
2026-03-24 01:02:47 dovecot_plain authenticator failed for H=([10.24.18.8]) [91.193.6.154]:6112: 535 Incorrect authentication data ([email protected])
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Brute-Force
SSH
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🇳🇱
big-cloud.nl
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Unauthorized SMTP connection attempt
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Brute-Force
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🇨🇿
lp
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Email account brute force: 5 attempts were recorded from 91.193.6.154
2026-03-18T04:39:32+01:00 warn ...
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Email account brute force: 5 attempts were recorded from 91.193.6.154
2026-03-18T04:39:32+01:00 warning: unknown[91.193.6.154]: SASL PLAIN authentication failed: authentication failure, [email protected]
2026-03-18T04:39:32+01:00 warning: unknown[91.193.6.154]: SASL LOGIN authentication failed: authentication failure, [email protected]
2026-03-18T04:39:33+01:00 warning: unknown[91.193.6.154]: SASL PLAIN authentication failed: authentication failure, [email protected]
2026-03-18T04:39:33+01:00 warning: unknown[91.193.6.154]: SASL LOGIN authentication failed: authentication failure, [email protected]
2026-03-18T04:39:41+01:00 warning: unknown[91.193.6.154]: SASL PLAIN authentication failed: authentication failure, [email protected]
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Brute-Force
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🇺🇸
Ghost Rider
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RdpGuard detected brute-force attempt on SMTP
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Brute-Force
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Anonymous
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(smtpauth) Failed SMTP AUTH login from 91.193.6.154 (CA/Canada/-)
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Brute-Force
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🇦🇺
screwlooseit.com.au
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Blocked by CSF 13 firewall - Rule: mysaslmatch
RO/Romania/-
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Web App Attack
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🇪🇸
librebit
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Attack to Postfix SASL, bad guys
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Brute-Force
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🇫🇷
UM3
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Exim Auth Failed
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Brute-Force
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🇪🇸
Nudisco
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Brute-Force
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