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Anonymous
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Failed login attempt detected by Fail2Ban in plesk-postfix jail
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Web Spam
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๐ต๐ฑ
IROK
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2026-04-22T02:31:29.516925 pclab24.pl postfix/smtpd[542251]: warning: unknown[212.56.49.81]: SASL PL ...
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2026-04-22T02:31:29.516925 pclab24.pl postfix/smtpd[542251]: warning: unknown[212.56.49.81]: SASL PLAIN authentication failed: authentication failure
2026-04-22T02:31:31.646234 pclab24.pl postfix/smtpd[542251]: warning: unknown[212.56.49.81]: SASL LOGIN authentication failed: authentication failure
2026-04-22T02:31:35.650975 pclab24.pl postfix/smtpd[542270]: warning: unknown[212.56.49.81]: SASL PLAIN authentication failed: authentication failure
2026-04-22T02:31:37.708141 pclab24.pl postfix/smtpd[542270]: warning: unknown[212.56.49.81]: SASL LOGIN authentication failed: authentication failure
2026-04-22T02:31:48.090034 pclab24.pl postfix/smtpd[542251]: warning: unknown[212.56.49.81]: SASL PLAIN authentication failed: authentication failure
...
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Brute-Force
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๐บ๐ธ
bigscoots.com
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(smtpauth) Failed SMTP AUTH login from 212.56.49.81 (CA/Canada/-): 5 in the last 3600 secs; Ports: 2 ...
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(smtpauth) Failed SMTP AUTH login from 212.56.49.81 (CA/Canada/-): 5 in the last 3600 secs; Ports: 25,465,587; Direction: 0; Trigger: LF_SMTPAUTH; Logs: 2026-04-21 20:31:17 dovecot_plain authenticator failed for H=([10.12.18.126]) [212.56.49.81]:18204: 535 Incorrect authentication data ([email protected])
2026-04-21 20:31:23 dovecot_login authenticator failed for H=([10.12.18.126]) [212.56.49.81]:18204: 535 Incorrect authentication data ([email protected])
2026-04-21 20:31:30 dovecot_plain authenticator failed for H=([10.12.18.126]) [212.56.49.81]:6171: 535 Incorrect authentication data ([email protected])
2026-04-21 20:31:32 dovecot_login authenticator failed for H=([10.12.18.126]) [212.56.49.81]:6171: 535 Incorrect authentication data ([email protected])
2026-04-21 20:31:45 dovecot_plain authenticator failed for H=([10.12.18.126]) [212.56.49.81]:30475: 535 Incorrect authentication data ([email protected])
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Brute-Force
SSH
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๐ฉ๐ช
NewWavesApp
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(smtpauth) Failed SMTP AUTH login from 212.56.49.81 (CA/Canada/-)
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Brute-Force
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๐ฌ๐ง
Apache
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(smtpauth) Failed SMTP AUTH login from 212.56.49.81 (CA/Canada/-): 10 in the last 300 secs
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Brute-Force
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๐ณ๐ฑ
Sonar
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Bad_host
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Brute-Force
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๐บ๐ธ
ras07
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Brute force SMTP/IMAP login attempts.
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Brute-Force
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๐ท๐ธ
Smel
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Mail/25/465/587-993/995 Probe, Reject, BadAuth, Hack, SPAM -
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Email Spam
Hacking
Brute-Force
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๐ฌ๐ง
consul.to
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Web attack/malicious scanning detected
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Web App Attack
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๐บ๐ธ
IDS
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Mar 28 15:11:11 mail postfix/smtpd[1975416]: warning: unknown[212.56.49.81]: SASL PLAIN authenticati ...
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Mar 28 15:11:11 mail postfix/smtpd[1975416]: warning: unknown[212.56.49.81]: SASL PLAIN authentication failed: authentication failure
Mar 28 15:11:13 mail postfix/smtpd[1975416]: warning: unknown[212.56.49.81]: SASL LOGIN authentication failed: authentication failure
Mar 28 15:11:15 mail postfix/smtpd[1975539]: warning: unknown[212.56.49.81]: SASL PLAIN authentication failed: authentication failure
Mar 28 15:11:18 mail postfix/smtpd[1975539]: warning: unknown[212.56.49.81]: SASL LOGIN authentication failed: authentication failure
Mar 28 15:11:26 mail postfix/smtpd[1975416]: warning: unknown[212.56.49.81]: SASL PLAIN authentication failed: authentication failure
...
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Brute-Force
Web App Attack
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Anonymous
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Authentication failure
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Brute-Force
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๐ท๐ธ
Smel
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Mail/25/465/587-993/995 Probe, Reject, BadAuth, Hack, SPAM -
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Email Spam
Hacking
Brute-Force
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๐ซ๐ท
UM3
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Exim Auth Failed
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Brute-Force
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๐จ๐ฟ
lp
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Email account brute force: 4 attempts were recorded from 212.56.49.81
2026-03-25T07:12:35+01:00 warn ...
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Email account brute force: 4 attempts were recorded from 212.56.49.81
2026-03-25T07:12:35+01:00 warning: unknown[212.56.49.81]: SASL PLAIN authentication failed: authentication failure, [email protected]
2026-03-25T07:12:35+01:00 warning: unknown[212.56.49.81]: SASL LOGIN authentication failed: authentication failure, [email protected]
2026-03-25T07:12:36+01:00 warning: unknown[212.56.49.81]: SASL PLAIN authentication failed: authentication failure, [email protected]
2026-03-25T07:12:36+01:00 warning: unknown[212.56.49.81]: SASL LOGIN authentication failed: authentication failure, [email protected]
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Brute-Force
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Anonymous
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(smtpauth) Failed SMTP AUTH login from 212.56.49.81 (CA/Canada/-)
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Brute-Force
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