IP Address: 5.16.78.237

Threat level: 8%

Attack count: 19

Country: Russia

Region: St.-Petersburg

City: St Petersburg

ASN: 51570

ISP: JSC ER-Telecom Holding

Net Block: 5.16.20.0-5.16.103.255

Stats (UTC)

Reported by

Timestamp

Notes

Flags

System

✅ Anonymous

6 days ago

Real-time Intercept: SMTP attack. Reference: 2026-07-19 14:32:14.8643 Login failure: 5.16.78.237 SMTP

BruteForce, Hacking

SMTP

✅ Craig

7 days ago

ipban 2.0.0 - Invalid Username or Password

BruteForce

MailEnable

✅ Arvoreen

7 days ago

fail2ban

BruteForce

postfix

7 days ago

fail2ban

BruteForce

tesi_postfix-auth

✅ Gordon

7 days ago

ipban 2.0.0

BruteForce

SMTP

✅ Anonymous

7 days ago

Real-time Intercept: SMTP attack. Reference: 2026-07-18 15:21:13.1919 Login failure: 5.16.78.237 SMTP

BruteForce, Hacking

SMTP