IP Address: 5.166.12.35


Threat level: 71%
Attack count: 52
Country: Russia
Region: Yaroslavl Oblast
City: Danilov
ASN: 51819
ISP: JSC ER-Telecom Holding
Net Block: 5.166.0.0-5.166.31.255
Stats (UTC)

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Recent submissions


Reported by
Timestamp
Notes
Flags
System
fail2ban
BruteForce
postfix
ipban 4.1.0 - LogonDenied
BruteForce
MSExchange
✅ Chris
ipban 2.0.0 - Invalid Username or Password
BruteForce
MailEnable
✅ Anonymous
Real-time Intercept: SMTP attack. Reference: 2026-09-06 17:51:09.3006 Login failure: 5.166.12.35 SMTP 2
BruteForce, Hacking
SMTP
ipban 4.1.0 - LogonDenied
BruteForce
MSExchangeLogs
✅ Chris
ipban 3.1.0 - Invalid Username or Password
BruteForce
MailEnable
ipban 4.1.0 - LogonDenied
BruteForce
MSExchangeLogs
✅ Chris
ipban 3.1.0 - Invalid Username or Password
BruteForce
MailEnable
ipban 4.1.0 - LogonDenied
BruteForce
MSExchange
✅ Chris
ipban 3.1.0 - Invalid Username or Password
BruteForce
MailEnable
✅ Chris
ipban 3.1.0 - Invalid Username or Password
BruteForce
MailEnable
ipban 4.1.0 - LogonDenied
BruteForce
MSExchange
ipban 4.1.0 - LogonDenied
BruteForce
MSExchange
fail2ban
BruteForce
tesi_postfix-auth
ipban 4.1.0 - LogonDenied
BruteForce
MSExchangeLogs
✅ Gordon
ipban 2.0.0
BruteForce
SMTP
✅ Craig
ipban 2.0.0 - Invalid Username or Password
BruteForce
MailEnable
fail2ban
BruteForce
postfix
✅ Chris
ipban 3.1.0 - Invalid Username or Password
BruteForce
MailEnable
✅ Anonymous
ipbanpro 5.0.0 - Invalid Username or Password
BruteForce
MailEnable
✅ Anonymous
Real-time Intercept: SMTP attack. Reference: 2026-08-31 15:28:02.4692 Login failure: 5.166.12.35 SMTP
BruteForce, Hacking
SMTP
ipban 4.1.0 - LogonDenied
BruteForce
MSExchangeLogs
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