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AbuseIPDB » 51.81.103.247

51.81.103.247 was found in our database!

This IP was reported 26 times. Confidence of Abuse is 0%: ?

ISP	OVH US LLC
Usage Type	Data Center/Web Hosting/Transit
ASN	AS16276
Hostname(s)	proxy-us-east000-cip8.ahrefs.net
Domain Name	ovhcloud.com
Country	🇺🇸 United States of America
City	Leesburg, Virginia

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

Important Note: 51.81.103.247 is an IP address from within our whitelist belonging to the subnet 51.81.103.240/28, which we identify as: "Ahrefs Crawler".

Whitelisted netblocks are typically owned by trusted entities, such as Google or Microsoft who may use them for search engine spiders. However, these same entities sometimes also provide cloud servers and mail services which are easily abused. Pay special attention when trusting or distrusting these IPs.

Report 51.81.103.247

Whois 51.81.103.247

IP Abuse Reports for 51.81.103.247:

This IP address has been reported a total of 26 times from 14 distinct sources. 51.81.103.247 was first reported on August 23rd 2026, and the most recent report was 3 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
🇩🇪 rh24	2026-09-18 01:41:28 (3 hours ago)	(apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.103.247 (US/Un ... show more (apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.103.247 (US/United States/proxy-us-east000-cip8.ahrefs.net) show less	Bad Web Bot
🇨🇦 Mediashaker	2026-09-15 22:18:26 (2 days ago)	(apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.103.247 (US/Un ... show more (apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.103.247 (US/United States/proxy-us-east000-cip8.ahrefs.net) show less	Bad Web Bot
🇩🇪 ghostwarriors	2026-09-15 07:20:37 (2 days ago)	Webpage scraping	Brute-Force Bad Web Bot Web App Attack
🇺🇸 SX Communications	2026-09-14 13:15:02 (3 days ago)	Blocked abusive HTTP application-layer DoS / botnet traffic from 51.81.103.247: traffic from this ad ... show more Blocked abusive HTTP application-layer DoS / botnet traffic from 51.81.103.247: traffic from this address continues high-cost dynamic page and feed requests at abusive rates via TCP/HTTPS despite edge block responses. Likely compromised end-user host. show less	DDoS Attack Bad Web Bot Exploited Host
🇺🇸 etu brutus	2026-09-09 15:18:02 (1 week ago)	51.81.103.247 Blocked by [Attack Vector List] ...	Hacking Brute-Force Exploited Host
🇩🇪 ghostwarriors	2026-09-08 19:50:16 (1 week ago)	Webpage scraping	Brute-Force Bad Web Bot Web App Attack
🇨🇦 Mediashaker	2026-09-08 14:19:36 (1 week ago)	(apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.103.247 (US/Un ... show more (apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.103.247 (US/United States/proxy-us-east000-cip8.ahrefs.net) show less	Bad Web Bot
🇺🇸 TPI-Abuse	2026-09-05 12:57:23 (1 week ago)	(mod_security) mod_security (id:210730) triggered by 51.81.103.247 (proxy-us-east000-cip8.ahrefs.net ... show more (mod_security) mod_security (id:210730) triggered by 51.81.103.247 (proxy-us-east000-cip8.ahrefs.net): 1 in the last 300 secs; Ports: *; Direction: 1; Trigger: LF_MODSEC; Logs: [Sat Sep 05 08:57:20.105530 2026] [security2:error] [pid 22186:tid 22186] [client 51.81.103.247:0] ModSecurity: Access denied with code 403 (phase 2). Match of "pmFromFile userdata_wl_extensions" against "TX:extension" required. [file "/etc/apache2/conf.d/modsec_vendor_configs/comodo_apache/10_HTTP_HTTP.conf"] [line "27"] [id "210730"] [rev "5"] [msg "COMODO WAF: URL file extension is restricted by policy\|\|www.swarnar.com\|F\|2"] [data ".economist.com"] [severity "CRITICAL"] [tag "CWAF"] [tag "HTTP"] [hostname "www.swarnar.com"] [uri "/www.economist.com"] [unique_id "apwRsLfj2KZYsJIc8UBKsgAAAAQ"] show less	Brute-Force Bad Web Bot Web App Attack
🇫🇷 GabrielJST	2026-09-04 23:24:15 (1 week ago)	(apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.103.247 (US/Un ... show more (apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.103.247 (US/United States/proxy-us-east000-cip8.ahrefs.net) show less	Bad Web Bot
Anonymous	2026-09-04 10:02:09 (1 week ago)	Scanner hitting /robots.txt on ara-oman.com () — aaguard	Brute-Force Port Scan
🇺🇸 SX Communications	2026-09-01 07:55:46 (2 weeks ago)	Blocked abusive HTTP application-layer DoS / botnet traffic from 51.81.103.247: traffic from this ad ... show more Blocked abusive HTTP application-layer DoS / botnet traffic from 51.81.103.247: traffic from this address continues high-cost dynamic page and feed requests at abusive rates via TCP/HTTPS despite edge block responses. Likely compromised end-user host. show less	DDoS Attack Bad Web Bot Exploited Host
🇺🇸 TPI-Abuse	2026-08-31 17:53:03 (2 weeks ago)	(mod_security) mod_security (id:210730) triggered by 51.81.103.247 (proxy-us-east000-cip8.ahrefs.net ... show more (mod_security) mod_security (id:210730) triggered by 51.81.103.247 (proxy-us-east000-cip8.ahrefs.net): 1 in the last 300 secs; Ports: *; Direction: 1; Trigger: LF_MODSEC; Logs: [Mon Aug 31 13:52:58.078694 2026] [security2:error] [pid 12665:tid 12665] [client 51.81.103.247:29950] ModSecurity: Access denied with code 403 (phase 2). Match of "pmFromFile userdata_wl_extensions" against "TX:extension" required. [file "/etc/apache2/conf.d/modsec_vendor_configs/comodo_apache/10_HTTP_HTTP.conf"] [line "27"] [id "210730"] [rev "5"] [msg "COMODO WAF: URL file extension is restricted by policy\|\|www.silvermoonherbals.com\|F\|2"] [data ".moongoth.com"] [severity "CRITICAL"] [tag "CWAF"] [tag "HTTP"] [hostname "www.silvermoonherbals.com"] [uri "/www.moongoth.com"] [unique_id "apW_erbew4vlpX8MCrIEJwAAAAM"] show less	Brute-Force Bad Web Bot Web App Attack
🇺🇸 SX Communications	2026-08-30 22:41:34 (2 weeks ago)	Blocked abusive HTTP application-layer DoS / botnet traffic from 51.81.103.247: traffic from this ad ... show more Blocked abusive HTTP application-layer DoS / botnet traffic from 51.81.103.247: traffic from this address continues high-cost dynamic page and feed requests at abusive rates via TCP/HTTPS despite edge block responses. Likely compromised end-user host. show less	DDoS Attack Bad Web Bot Exploited Host
🇩🇪 ghostwarriors	2026-08-29 22:50:41 (2 weeks ago)	Webpage scraping	Brute-Force Bad Web Bot Web App Attack
🇺🇸 LotPhantom	2026-08-29 09:28:04 (2 weeks ago)	51.81.103.247 - - [29/Aug/2026:09:27:05 +0000] "GET / HTTP/2.0" 200 35207 "-" "Mozilla/5.0 (compatib ... show more 51.81.103.247 - - [29/Aug/2026:09:27:05 +0000] "GET / HTTP/2.0" 200 35207 "-" "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)" ... show less	Web App Attack Bad Web Bot

Showing 1 to 15 of 26 reports

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