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๐ฉ๐ช
filstal.org
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CrowdSec: crowdsecurity/postfix-spam
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Email Spam
Brute-Force
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๐ฉ๐ช
gadix
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May 31 05:27:14 srv06 postfix/smtpd[2078455]: warning: unknown[183.81.50.15]: SASL CRAM-MD5 authenti ...
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May 31 05:27:14 srv06 postfix/smtpd[2078455]: warning: unknown[183.81.50.15]: SASL CRAM-MD5 authentication failed: authentication failure
May 31 05:27:14 srv06 postfix/smtpd[2078455]: warning: unknown[183.81.50.15]: SASL PLAIN authentication failed: authentication failure
May 31 05:27:15 srv06 postfix/smtpd[2078455]: warning: unknown[183.81.50.15]: SASL LOGIN authentication failed: authentication failure
...
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Brute-Force
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๐ซ๐ฎ
notelseit
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2026-05-31T05:01:22.463685+02:00 mail postfix/smtps/smtpd[3471623]: warning: unknown[183.81.50.15]: ...
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2026-05-31T05:01:22.463685+02:00 mail postfix/smtps/smtpd[3471623]: warning: unknown[183.81.50.15]: SASL PLAIN authentication failed: (reason unavailable), [email protected]
2026-05-31T05:01:29.010981+02:00 mail postfix/smtps/smtpd[3471623]: warning: unknown[183.81.50.15]: SASL LOGIN authentication failed: (reason unavailable), [email protected]
2026-05-31T05:01:29.192402+02:00 mail postfix/smtps/smtpd[3471623]: disconnect from unknown[183.81.50.15] ehlo=1 auth=0/2 commands=1/3
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Brute-Force
Email Spam
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๐น๐ญ
thaizone.com
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Mail credential brute-force attack (SM6) #1
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Email Spam
Brute-Force
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๐ฉ๐ช
2and.de
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May 30 22:58:44 virtcc postfix/smtpd[2476981]: warning: unknown[183.81.50.15]: SASL PLAIN authentica ...
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May 30 22:58:44 virtcc postfix/smtpd[2476981]: warning: unknown[183.81.50.15]: SASL PLAIN authentication failed: authentication failure
May 30 22:58:44 virtcc postfix/smtpd[2476983]: warning: unknown[183.81.50.15]: SASL PLAIN authentication failed: authentication failure
May 30 22:58:47 virtcc postfix/smtpd[2476981]: warning: unknown[183.81.50.15]: SASL LOGIN authentication failed: authentication failure
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Brute-Force
Exploited Host
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Anonymous
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8x Postfix SASL LOGIN authentication failed
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Brute-Force
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๐ฉ๐ช
vcis.de
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SMTP brute force attack detected from [183.81.50.15]
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Brute-Force
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Anonymous
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postfix
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Email Spam
Web App Attack
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๐จ๐ฟ
lp
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Email account brute force: 4 attempts were recorded from 183.81.50.15
2026-05-28T09:54:04+02:00 warn ...
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Email account brute force: 4 attempts were recorded from 183.81.50.15
2026-05-28T09:54:04+02:00 warning: unknown[183.81.50.15]: SASL PLAIN authentication failed: authentication failure, [email protected]
2026-05-28T09:54:05+02:00 warning: unknown[183.81.50.15]: SASL LOGIN authentication failed: authentication failure, [email protected]
2026-05-28T09:54:14+02:00 warning: unknown[183.81.50.15]: SASL PLAIN authentication failed: authentication failure, [email protected]
2026-05-28T09:54:15+02:00 warning: unknown[183.81.50.15]: SASL LOGIN authentication failed: authentication failure, [email protected]
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Brute-Force
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๐ฉ๐ช
gadix
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May 28 07:04:06 srv06 postfix/smtpd[1452895]: warning: unknown[183.81.50.15]: SASL CRAM-MD5 authenti ...
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May 28 07:04:06 srv06 postfix/smtpd[1452895]: warning: unknown[183.81.50.15]: SASL CRAM-MD5 authentication failed: authentication failure
May 28 07:04:06 srv06 postfix/smtpd[1452895]: warning: unknown[183.81.50.15]: SASL PLAIN authentication failed: authentication failure
May 28 07:04:07 srv06 postfix/smtpd[1452895]: warning: unknown[183.81.50.15]: SASL LOGIN authentication failed: authentication failure
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Brute-Force
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๐ซ๐ฎ
notelseit
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2026-05-28T06:54:17.234211+02:00 mail postfix/smtps/smtpd[2972148]: warning: unknown[183.81.50.15]: ...
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2026-05-28T06:54:17.234211+02:00 mail postfix/smtps/smtpd[2972148]: warning: unknown[183.81.50.15]: SASL PLAIN authentication failed: (reason unavailable), [email protected]
2026-05-28T06:54:23.284324+02:00 mail postfix/smtps/smtpd[2972148]: warning: unknown[183.81.50.15]: SASL LOGIN authentication failed: (reason unavailable), [email protected]
2026-05-28T06:54:23.464683+02:00 mail postfix/smtps/smtpd[2972148]: disconnect from unknown[183.81.50.15] ehlo=1 auth=0/2 commands=1/3
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Brute-Force
Email Spam
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๐จ๐ฟ
lp
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Email account brute force: 4 attempts were recorded from 183.81.50.15
2026-05-28T00:15:18+02:00 warn ...
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Email account brute force: 4 attempts were recorded from 183.81.50.15
2026-05-28T00:15:18+02:00 warning: unknown[183.81.50.15]: SASL PLAIN authentication failed: authentication failure, [email protected]
2026-05-28T00:15:19+02:00 warning: unknown[183.81.50.15]: SASL LOGIN authentication failed: authentication failure, [email protected]
2026-05-28T00:44:07+02:00 warning: unknown[183.81.50.15]: SASL PLAIN authentication failed: authentication failure, [email protected]
2026-05-28T00:44:08+02:00 warning: unknown[183.81.50.15]: SASL LOGIN authentication failed: authentication failure, [email protected]
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Brute-Force
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๐บ๐ธ
mnogoweb
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(smtpauth) Failed SMTP AUTH login from 183.81.50.15 (VN/Vietnam/-): 5 in the last 3600 secs; Ports: ...
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(smtpauth) Failed SMTP AUTH login from 183.81.50.15 (VN/Vietnam/-): 5 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_SMTPAUTH; Logs: 2026-05-27 15:17:09 plain authenticator failed for (E43HFC1) [183.81.50.15]: 535 Incorrect authentication data ([email protected])
2026-05-27 15:17:09 plain authenticator failed for (CEJ5O) [183.81.50.15]: 535 Incorrect authentication data ([email protected])
2026-05-27 15:17:09 plain authenticator failed for (738K4S3IJ) [183.81.50.15]: 535 Incorrect authentication data ([email protected])
2026-05-27 15:17:09 plain authenticator failed for (T31NGXPI6836) [183.81.50.15]: 535 Incorrect authentication data ([email protected])
2026-05-27 15:17:10 login authenticator failed for (E43HFC1) [183.81.50.15]: 535 Incorrect authentication data ([email protected])
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Port Scan
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๐บ๐ธ
bigscoots.com
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(smtpauth) Failed SMTP AUTH login from 183.81.50.15 (VN/Vietnam/-): 5 in the last 3600 secs; Ports: ...
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(smtpauth) Failed SMTP AUTH login from 183.81.50.15 (VN/Vietnam/-): 5 in the last 3600 secs; Ports: 25,465,587; Direction: 0; Trigger: LF_SMTPAUTH; Logs: 2026-05-27 16:56:37 dovecot_plain authenticator failed for H=(56QUULLY) [183.81.50.15]:18017: 535 Incorrect authentication data ([email protected])
2026-05-27 16:56:44 dovecot_login authenticator failed for H=(56QUULLY) [183.81.50.15]:18017: 535 Incorrect authentication data ([email protected])
2026-05-27 17:04:23 dovecot_plain authenticator failed for H=(6MB1PQ8V7O8RZW8) [183.81.50.15]:4090: 535 Incorrect authentication data ([email protected])
2026-05-27 17:04:27 dovecot_plain authenticator failed for H=(B9MP3) [183.81.50.15]:5038: 535 Incorrect authentication data ([email protected])
2026-05-27 17:04:30 dovecot_login authenticator failed for H=(6MB1PQ8V7O8RZW8) [183.81.50.15]:4090: 535 Incorrect authentication data ([email protected])
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Brute-Force
SSH
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๐ฉ๐ช
Packets-Decreaser.NET
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Incoming Layer 7 Flood Detected
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DDoS Attack
Web Spam
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