IP Address: 121.140.163.62


Threat level: 19%
Attack count: 28
Country: South Korea
Region: Seoul
City: Gwanak-gu
ASN: 4766
ISP: Korea Telecom
Net Block: 121.140.138.0-121.141.100.255
Domain name: kt.com
Abuse contact: [email protected]
Stats (UTC)

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Reported by
Timestamp
Notes
Flags
System
✅ Chris
ipban 3.1.0 - Invalid Username or Password
BruteForce
MailEnable
✅ Chris
ipban 2.0.0 - Invalid Username or Password
BruteForce
MailEnable
ipban 1.8.0 - LogonDenied
BruteForce
MSExchangeLogs
✅ Chris
ipban 3.1.0 - Invalid Username or Password
BruteForce
MailEnable
ipban 1.8.0 - LogonDenied
BruteForce
MSExchangeLogs
✅ Chris
ipban 3.1.0 - Invalid Username or Password
BruteForce
MailEnable
✅ Chris
ipban 3.1.0 - Invalid Username or Password
BruteForce
MailEnable
ipban 1.8.0 - LogonDenied
BruteForce
MSExchangeLogs
✅ Anonymous
ipbanpro 5.0.0 - Invalid Username or Password
BruteForce
MailEnable
✅ Craig
ipban 2.0.0 - Invalid Username or Password
BruteForce
MailEnable
✅ Chris
ipban 3.1.0 - Invalid Username or Password
BruteForce
MailEnable
✅ Chris
ipban 3.1.0 - Invalid Username or Password
BruteForce
MailEnable
✅ Anonymous
Real-time Intercept: SMTP attack. Reference: 2026-08-06 20:30:35.3031 Login failure: 121.140.163.62 SMTP
BruteForce, Hacking
SMTP
fail2ban
BruteForce
tesi_postfix-auth
fail2ban
BruteForce
postfix
✅ Chris
ipban 2.0.0 - Invalid Username or Password
BruteForce
MailEnable
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