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AbuseIPDB » 66.56.81.21

66.56.81.21 was found in our database!

This IP was reported 21 times. Confidence of Abuse is 0%: ?

ISP	VPN Consumer Toronto, Canada
Usage Type	Data Center/Web Hosting/Transit
ASN	AS212238
Domain Name	vpnconsumer.com
Country	🇨🇦 Canada
City	Toronto, Ontario

IP info including ISP, Usage Type, and Location provided by IPInfo. Updated weekly.

Report 66.56.81.21

Whois 66.56.81.21

IP Abuse Reports for 66.56.81.21:

This IP address has been reported a total of 21 times from 11 distinct sources. 66.56.81.21 was first reported on August 23rd 2025, and the most recent report was 2 months ago.

Old Reports: The most recent abuse report for this IP address is from 2 months ago . It is possible that this IP is no longer involved in abusive activities.

Reporter	IoA Timestamp (UTC)	Comment	Categories
🇩🇪 Nerdscave Hosting	2026-04-15 22:11:48 (2 months ago)	SMTP brute-force detected by Fail2Ban in plesk-postfix jail	Email Spam Brute-Force
🇬🇧 chrisw	2026-04-15 22:04:11 (2 months ago)	Apr 15 23:04:03 l03 postfix/smtpd[5487]: warning: unknown[66.56.81.21]: SASL PLAIN authentication fa ... show more Apr 15 23:04:03 l03 postfix/smtpd[5487]: warning: unknown[66.56.81.21]: SASL PLAIN authentication failed: authentication failure Apr 15 23:04:05 l03 postfix/smtpd[5487]: warning: unknown[66.56.81.21]: SASL LOGIN authentication failed: authentication failure Apr 15 23:04:08 l03 postfix/smtps/smtpd[5572]: warning: unknown[66.56.81.21]: SASL PLAIN authentication failed: authentication failure Apr 15 23:04:10 l03 postfix/smtps/smtpd[5572]: warning: unknown[66.56.81.21]: SASL LOGIN authentication failed: authentication failure ... show less	Web Spam Brute-Force Exploited Host
🇮🇩 xveil	2026-04-15 21:38:27 (2 months ago)	2026-04-16T04:38:25.535365 mail-honeypot postfix/submission/smtpd[29912]: warning: unknown[66.56.81. ... show more 2026-04-16T04:38:25.535365 mail-honeypot postfix/submission/smtpd[29912]: warning: unknown[66.56.81.21]: SASL PLAIN authentication failed: authentication failure ... show less	Brute-Force
🇺🇸 xmission.com	2026-03-17 17:41:48 (3 months ago)	Blocked by UFW (TCP on 1) Source port: 52826 TTL: 117 Packet length: 52 TOS: 0x00 This report (for ... show more Blocked by UFW (TCP on 1) Source port: 52826 TTL: 117 Packet length: 52 TOS: 0x00 This report (for 66.56.81.21) was generated by: https://github.com/sefinek/UFW-AbuseIPDB-Reporter show less	Port Scan
Anonymous	2026-03-09 10:50:25 (3 months ago)	Unauthorized connection attempt detected in the last 24 hours	Hacking
🇺🇸 xmission.com	2026-03-02 08:00:33 (3 months ago)	Blocked by UFW (TCP on 51413) Source port: 24900 TTL: 51 Packet length: 60 TOS: 0x08 This report (f ... show more Blocked by UFW (TCP on 51413) Source port: 24900 TTL: 51 Packet length: 60 TOS: 0x08 This report (for 66.56.81.21) was generated by: https://github.com/sefinek/UFW-AbuseIPDB-Reporter show less	Port Scan
🇨🇭 barateza	2026-02-20 10:00:03 (4 months ago)	WAF repeated trigger detected by Fail2Ban in plesk-modsecurity jail	Web App Attack
Anonymous	2026-02-06 12:40:06 (4 months ago)	Unauthorized connection attempt detected in the last 24 hours	Hacking
Anonymous	2026-02-03 12:35:23 (4 months ago)	Unauthorized connection attempt detected in the last 24 hours	Hacking
🇺🇸 xmission.com	2026-01-28 22:51:10 (4 months ago)	Blocked by UFW (TCP on 51413) Source port: 25582 TTL: 52 Packet length: 60 TOS: 0x08 This report (f ... show more Blocked by UFW (TCP on 51413) Source port: 25582 TTL: 52 Packet length: 60 TOS: 0x08 This report (for 66.56.81.21) was generated by: https://github.com/sefinek/UFW-AbuseIPDB-Reporter show less	Port Scan
🇷🇸 Smel	2026-01-26 09:49:09 (4 months ago)	Mail/25/465/587-993/995 Probe, Reject, BadAuth, Hack, SPAM -	Email Spam Hacking Brute-Force
🇺🇸 bigscoots.com	2026-01-26 09:41:58 (4 months ago)	(smtpauth) Failed SMTP AUTH login from 66.56.81.21 (CA/Canada/-): 5 in the last 3600 secs; Ports: 25 ... show more (smtpauth) Failed SMTP AUTH login from 66.56.81.21 (CA/Canada/-): 5 in the last 3600 secs; Ports: 25,465,587; Direction: 0; Trigger: LF_SMTPAUTH; Logs: 2026-01-26 04:41:18 dovecot_plain authenticator failed for H=([10.20.18.147]) [66.56.81.21]:9106: 535 Incorrect authentication data ([email protected]) 2026-01-26 04:41:24 dovecot_login authenticator failed for H=([10.20.18.147]) [66.56.81.21]:9106: 535 Incorrect authentication data ([email protected]) 2026-01-26 04:41:30 dovecot_plain authenticator failed for H=([10.20.18.147]) [66.56.81.21]:20359: 535 Incorrect authentication data ([email protected]) 2026-01-26 04:41:36 dovecot_login authenticator failed for H=([10.20.18.147]) [66.56.81.21]:20359: 535 Incorrect authentication data ([email protected]) 2026-01-26 04:41:55 dovecot_plain authenticator failed for H=([10.20.18.147]) [66.56.81.21]:57463: 535 Incorrect authentication data ([email protected]) show less	Brute-Force SSH
🇨🇿 lp	2026-01-20 17:54:57 (5 months ago)	Email account brute force: 6 attempts were recorded from 66.56.81.21 2026-01-20T09:40:24+01:00 warni ... show more Email account brute force: 6 attempts were recorded from 66.56.81.21 2026-01-20T09:40:24+01:00 warning: unknown[66.56.81.21]: SASL PLAIN authentication failed: authentication failure, [email protected] 2026-01-20T09:40:25+01:00 warning: unknown[66.56.81.21]: SASL LOGIN authentication failed: authentication failure, [email protected] 2026-01-20T09:40:26+01:00 warning: unknown[66.56.81.21]: SASL PLAIN authentication failed: authentication failure, [email protected] 2026-01-20T09:40:26+01:00 warning: unknown[66.56.81.21]: SASL LOGIN authentication failed: authentication failure, [email protected] 2026-01-20T09:42:14+01:00 warning: unknown[66.56.81.21]: SASL PLAIN authentication failed: authentication failure, [email protected] 2026-01-20T09:42:14+01:00 warning: unknown[66.56.81.21]: SASL LOGIN authentication failed: authentication failure, s show less	Brute-Force
Anonymous	2026-01-07 12:25:10 (5 months ago)	Unauthorized connection attempt detected in the last 24 hours	Hacking
Anonymous	2026-01-01 16:45:15 (5 months ago)	Unauthorized connection attempt detected in the last 24 hours	Hacking

Showing 1 to 15 of 21 reports

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