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AbuseIPDB » 45.139.104.123

45.139.104.123 was found in our database!

This IP was reported 172 times. Confidence of Abuse is 100%: ?

100%

ISP	49.3 Networking LLC
Usage Type	Data Center/Web Hosting/Transit
ASN	AS399979
Domain Name	493networking.cc
Country	🇩🇪 Germany
City	Frankfurt am Main, Hesse

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

Report 45.139.104.123

Whois 45.139.104.123

IP Abuse Reports for 45.139.104.123:

This IP address has been reported a total of 172 times from 44 distinct sources. 45.139.104.123 was first reported on June 10th 2022, and the most recent report was 4 hours ago.

Recent Reports: We have received reports of abusive activity from this IP address within the last week. It is potentially still actively engaged in abusive activities.

Reporter	IoA Timestamp (UTC)	Comment	Categories
🇺🇸 aks4226	2026-06-04 17:20:49 (4 hours ago)	Unauthorized connections to mail server.	Brute-Force
🇺🇸 mnogoweb	2026-06-04 09:23:04 (12 hours ago)	(smtpauth) Failed SMTP AUTH login from 45.139.104.123 (DE/Germany/-): 5 in the last 3600 secs; Ports ... show more (smtpauth) Failed SMTP AUTH login from 45.139.104.123 (DE/Germany/-): 5 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_SMTPAUTH; Logs: 2026-06-04 02:47:25 plain authenticator failed for ([45.139.104.123]) [45.139.104.123]: 535 Incorrect authentication data (set_id=garry4444) 2026-06-04 02:47:26 login authenticator failed for ([45.139.104.123]) [45.139.104.123]: 535 Incorrect authentication data (set_id=garry4444) 2026-06-04 02:47:34 plain authenticator failed for ([45.139.104.123]) [45.139.104.123]: 535 Incorrect authentication data ([email protected]) 2026-06-04 02:47:34 login authenticator failed for ([45.139.104.123]) [45.139.104.123]: 535 Incorrect authentication data ([email protected]) 2026-06-04 03:23:02 plain authenticator failed for ([45.139.104.123]) [45.139.104.123]: 535 Incorrect authentication data (set_id=coxn0941) show less	Port Scan
🇩🇪 cloudmax	2026-06-04 07:44:38 (14 hours ago)	Cloudmax IPS Block - Suspicious activity. Possible port scanning, service reconnaissance, or vulnera ... show more Cloudmax IPS Block - Suspicious activity. Possible port scanning, service reconnaissance, or vulnerability probing show less	Port Scan
Anonymous	2026-06-03 09:28:58 (1 day ago)	Jun 3 11:28:52 mx4 postfix/submission/smtpd[2329149]: warning: unknown[45.139.104.123]: SASL PLAIN ... show more Jun 3 11:28:52 mx4 postfix/submission/smtpd[2329149]: warning: unknown[45.139.104.123]: SASL PLAIN authentication failed: Jun 3 11:28:58 mx4 postfix/submission/smtpd[2329149]: warning: unknown[45.139.104.123]: SASL LOGIN authentication failed: UGFzc3dvcmQ6 ... show less	Brute-Force
🇫🇷 tecnicorioja	2026-06-03 06:01:11 (1 day ago)	SASL LOGIN authentication failed Jun 03 04:32:03	Brute-Force
🇫🇷 tecnicorioja	2026-06-03 02:00:36 (1 day ago)	SASL LOGIN authentication failed Jun 03 00:09:58	Brute-Force
🇩🇪 cloudmax	2026-06-03 00:36:02 (1 day ago)	Cloudmax IPS Block - Suspicious activity. Possible port scanning, service reconnaissance, or vulnera ... show more Cloudmax IPS Block - Suspicious activity. Possible port scanning, service reconnaissance, or vulnerability probing show less	Port Scan
🇹🇭 thaizone.com	2026-06-02 23:57:30 (1 day ago)	Mail credential brute-force attack (SM5) #1	Email Spam Brute-Force
🇺🇸 factor1	2026-06-02 22:04:40 (1 day ago)	Fail2ban at sherman Reports Abuse.	Hacking Brute-Force
🇫🇷 tecnicorioja	2026-06-02 22:00:38 (1 day ago)	SASL LOGIN authentication failed Jun 02 23:27:37	Brute-Force
🇫🇷 tecnicorioja	2026-06-02 10:00:40 (2 days ago)	SASL LOGIN authentication failed Jun 02 11:05:51	Brute-Force
🇩🇪 london2038.com	2026-06-02 08:38:48 (2 days ago)	Connection atttempts against closed TCP ports Jun 2 07:48:40 BLOCK SRC=45.139.104.123 LEN=52 TOS=0x ... show more Connection atttempts against closed TCP ports Jun 2 07:48:40 BLOCK SRC=45.139.104.123 LEN=52 TOS=0x02 PREC=0x00 TTL=120 ID=8036 DF PROTO=TCP SPT=55094 DPT=587 WINDOW=64240 RES=0x00 CWR ECE SYN Jun 2 10:38:46 BLOCK SRC=45.139.104.123 LEN=52 TOS=0x0A PREC=0x20 TTL=119 ID=56161 DF PROTO=TCP SPT=61771 DPT=587 WINDOW=64240 RES=0x00 CWR ECE SYN Jun 2 10:38:47 BLOCK SRC=45.139.104.123 LEN=52 TOS=0x0A PREC=0x20 TTL=119 ID=56162 DF PROTO=TCP SPT=61771 DPT=587 WINDOW=64240 RES=0x00 CWR ECE SYN show less	Port Scan
🇺🇸 mnogoweb	2026-06-02 07:55:45 (2 days ago)	(smtpauth) Failed SMTP AUTH login from 45.139.104.123 (DE/Germany/-): 5 in the last 3600 secs; Ports ... show more (smtpauth) Failed SMTP AUTH login from 45.139.104.123 (DE/Germany/-): 5 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_SMTPAUTH; Logs: 2026-06-02 01:38:24 plain authenticator failed for ([45.139.104.123]) [45.139.104.123]: 535 Incorrect authentication data ([email protected]) 2026-06-02 01:38:25 login authenticator failed for ([45.139.104.123]) [45.139.104.123]: 535 Incorrect authentication data ([email protected]) 2026-06-02 01:48:17 plain authenticator failed for ([45.139.104.123]) [45.139.104.123]: 535 Incorrect authentication data (set_id=cjioh) 2026-06-02 01:48:18 login authenticator failed for ([45.139.104.123]) [45.139.104.123]: 535 Incorrect authentication data (set_id=cjioh) 2026-06-02 01:55:41 plain authenticator failed for ([45.139.104.123]) [45.139.104.123]: 535 Incorrect authentication data (set_id=madridista191) show less	Port Scan
🇫🇷 tecnicorioja	2026-06-02 06:00:52 (2 days ago)	SASL LOGIN authentication failed Jun 02 07:58:21	Brute-Force
🇩🇪 cloudmax	2026-06-01 21:33:07 (3 days ago)	Cloudmax IPS Block - Suspicious activity. Possible port scanning, service reconnaissance, or vulnera ... show more Cloudmax IPS Block - Suspicious activity. Possible port scanning, service reconnaissance, or vulnerability probing show less	Port Scan

Showing 1 to 15 of 172 reports

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