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AbuseIPDB » 66.56.81.52

66.56.81.52 was found in our database!

This IP was reported 44 times. Confidence of Abuse is 26%: ?

26%

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 66.56.81.52

Whois 66.56.81.52

IP Abuse Reports for 66.56.81.52:

This IP address has been reported a total of 44 times from 28 distinct sources. 66.56.81.52 was first reported on October 6th 2025, and the most recent report was 1 week ago.

Old Reports: The most recent abuse report for this IP address is from 1 week ago . It is possible that this IP is no longer involved in abusive activities.

Reporter	IoA Timestamp (UTC)	Comment	Categories
Anonymous	2026-06-13 03:10:16 (1 week ago)	2026-06-13 03:10:15 warning[1402222]: host unknown[66.56.81.52]: unauthorized access attem ... show more 2026-06-13 03:10:15 warning[1402222]: host unknown[66.56.81.52]: unauthorized access attempted: tcp/9010 show less	Port Scan Brute-Force
🇨🇭 Kepler-1649c	2026-04-21 19:48:00 (1 month ago)	SMTP Authentication errors	Brute-Force Hacking
🇩🇪 Pz	2026-04-21 16:53:26 (1 month ago)	2026-04-21T16:53:21.098632+00:00 htz2.hosts.pzenix.com postfix/smtpd[3348029]: warning: unknown[66.5 ... show more 2026-04-21T16:53:21.098632+00:00 htz2.hosts.pzenix.com postfix/smtpd[3348029]: warning: unknown[66.56.81.52]: SASL PLAIN authentication failed: authentication failure, [email protected] 2026-04-21T16:53:23.268829+00:00 htz2.hosts.pzenix.com postfix/smtpd[3348029]: warning: unknown[66.56.81.52]: SASL LOGIN authentication failed: authentication failure, [email protected] 2026-04-21T16:53:25.894672+00:00 htz2.hosts.pzenix.com postfix/smtpd[3348033]: warning: unknown[66.56.81.52]: SASL PLAIN authentication failed: authentication failure, [email protected] ... show less	Brute-Force
🇺🇸 bigscoots.com	2026-04-21 16:11:59 (1 month ago)	(smtpauth) Failed SMTP AUTH login from 66.56.81.52 (CA/Canada/-): 5 in the last 3600 secs; Ports: 25 ... show more (smtpauth) Failed SMTP AUTH login from 66.56.81.52 (CA/Canada/-): 5 in the last 3600 secs; Ports: 25,465,587; Direction: 0; Trigger: LF_SMTPAUTH; Logs: 2026-04-21 12:11:46 dovecot_plain authenticator failed for H=([10.20.18.27]) [66.56.81.52]:56549: 535 Incorrect authentication data ([email protected]) 2026-04-21 12:11:50 dovecot_plain authenticator failed for H=([10.20.18.27]) [66.56.81.52]:32740: 535 Incorrect authentication data ([email protected]) 2026-04-21 12:11:51 dovecot_plain authenticator failed for H=([10.20.18.27]) [66.56.81.52]:28584: 535 Incorrect authentication data ([email protected]) 2026-04-21 12:11:52 dovecot_login authenticator failed for H=([10.20.18.27]) [66.56.81.52]:56549: 535 Incorrect authentication data ([email protected]) 2026-04-21 12:11:56 dovecot_login authenticator failed for H=([10.20.18.27]) [66.56.81.52]:32740: 535 Incorrect authentication data ([email protected]) show less	Brute-Force SSH
🇨🇭 Origon	2026-04-21 13:22:51 (1 month ago)	recidive - IP: 66.56.81.52 - 2026-04-21 05:19:59,936 fail2ban.actions [2317442]: NOTICE [plesk-post ... show more recidive - IP: 66.56.81.52 - 2026-04-21 05:19:59,936 fail2ban.actions [2317442]: NOTICE [plesk-postfix] Ban 66.56.81.52 2026-04-21 12:55:10,763 fail2ban.actions [2317442]: NOTICE [plesk-postfix] Ban 66.56.81.52 2026-04-21 15:22:51,079 fail2ban.actions [2317442]: NOTICE [plesk-postfix] Ban 66.56.81.52 show less	Web App Attack
🇦🇺 jalim	2026-04-21 12:43:42 (1 month ago)	Fail2Ban (11cc81a08e1b): 3 attempts from 66.56.81.52 triggered postfix-sasl jail. Ban time: 3600s. A ... show more Fail2Ban (11cc81a08e1b): 3 attempts from 66.56.81.52 triggered postfix-sasl jail. Ban time: 3600s. Attack patterns detected in mail server logs. show less	Brute-Force
🇩🇪 Paul Smith	2026-04-21 10:57:37 (1 month ago)	Email Auth Brute force attack 6/1 in last day	Brute-Force
🇫🇷 GabrielJST	2026-04-21 10:13:20 (1 month ago)	(smtpauth) Failed SMTP AUTH login from 66.56.81.52 (CA/Canada/-)	Brute-Force
🇨🇿 janekCZ	2026-04-21 06:46:25 (1 month ago)	Fail2Ban report from jail 'postfix': 2026-04-21T08:46:24.299633+02:00 mail postfix/submission/smtpd[ ... show more Fail2Ban report from jail 'postfix': 2026-04-21T08:46:24.299633+02:00 mail postfix/submission/smtpd[2621241]: warning: unknown[66.56.81.52]: SASL PLAIN authentication failed: (reason unavailable), [email protected] ... show less	Brute-Force SSH
🇧🇷 hostseries	2026-04-21 06:19:20 (1 month ago)	Trigger: LF_SMTPAUTH	Brute-Force
🇨🇿 lp	2026-04-21 04:50:09 (1 month ago)	Email account brute force: 12 attempts were recorded from 66.56.81.52 2026-04-21T03:22:36+02:00 warn ... show more Email account brute force: 12 attempts were recorded from 66.56.81.52 2026-04-21T03:22:36+02:00 warning: unknown[66.56.81.52]: SASL PLAIN authentication failed: authentication failure, [email protected] 2026-04-21T03:22:36+02:00 warning: unknown[66.56.81.52]: SASL LOGIN authentication failed: authentication failure, [email protected] 2026-04-21T03:22:37+02:00 warning: unknown[66.56.81.52]: SASL PLAIN authentication failed: authentication failure, [email protected] 2026-04-21T03:22:38+02:00 warning: unknown[66.56.81.52]: SASL LOGIN authentication failed: authentication failure, [email protected] 2026-04-21T03:22:45+02:00 warning: unknown[66.56.81.52]: SASL PLAIN authentication failed: authentication failure, [email protected] 2026-04-21T03:22:45+02:00 warning: unknown[66.56.81.52]: SASL LOGIN authentication failed: authentication failure, show less	Brute-Force
Anonymous	2026-04-21 03:56:02 (1 month ago)	...	Brute-Force
🇷🇴 SpamStopper	2026-04-21 01:24:40 (1 month ago)	Apr 21 04:24:27 mailserver postfix/submission/smtpd[3460204]: warning: unknown[66.56.81.52]: SASL PL ... show more Apr 21 04:24:27 mailserver postfix/submission/smtpd[3460204]: warning: unknown[66.56.81.52]: SASL PLAIN authentication failed: Apr 21 04:24:33 mailserver postfix/submission/smtpd[3460204]: warning: unknown[66.56.81.52]: SASL LOGIN authentication failed: UGFzc3dvcmQ6 Apr 21 04:24:40 mailserver postfix/smtps/smtpd[3460206]: warning: unknown[66.56.81.52]: SASL PLAIN authentication failed: show less	Brute-Force Bad Web Bot
Anonymous	2026-03-27 16:53:03 (2 months ago)	25x Postfix SASL LOGIN authentication failed	Brute-Force
🇷🇺 DZBOT	2026-03-23 08:47:11 (2 months ago)	DZBOT. Brute-force users SMTP	Brute-Force

Showing 1 to 15 of 44 reports

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