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51.81.165.220

Neutral Activity Whitelisted Subnet

Abuse confidence score ?

0% Low Risk

56 reports

22 reporters · latest 1 day ago

51.81.165.220 is an IP address from within our whitelist belonging to the subnet 51.81.165.208/28, which we identify as "Ahrefs Crawler".

ISP	OVH US LLC
Usage Type	Data Center/Web Hosting/Transit
ASN	AS16276
Hostname(s)	proxy-us-west006-cip13.ahrefs.net
Domain Name	ovhcloud.com
Country	🇺🇸 United States of America
City	Hillsboro, Oregon

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

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IP Abuse Reports for 51.81.165.220

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This IP address has been reported a total of 56 times from 22 distinct sources. 51.81.165.220 was first reported on August 23rd 2026, and the most recent report was 1 day ago. In the last 60 days, the top reporter locations were: Germany with 22 reports; United States of America with 14 reports; Canada with 12 reports. The most common categories in these recent reports were: Bad Web Bot 48 times; Web App Attack 13 times; Brute-Force 12 times; Exploited Host 8 times; DDoS Attack 7 times; Other 10 times.

Reporter	IoA Timestamp (UTC)	Comment	Categories
🇧🇷 ICS Labs	2026-10-20 16:51:01 (1 day ago)	ICS Labs threat intelligence (ICS Feeds): Brute-Force. Last observed 2026-10-20 UTC.	Brute-Force
🇩🇪 ghostwarriors	2026-10-20 10:50:35 (1 day ago)	Webpage scraping	Brute-Force Bad Web Bot Web App Attack
🇺🇸 TPI-Abuse	2026-10-20 06:46:08 (1 day ago)	(mod_security) mod_security (id:210730) triggered by 51.81.165.220 (proxy-us-west006-cip13.ahrefs.ne ... show more (mod_security) mod_security (id:210730) triggered by 51.81.165.220 (proxy-us-west006-cip13.ahrefs.net): 1 in the last 300 secs; Ports: *; Direction: 1; Trigger: LF_MODSEC; Logs: [Tue Oct 20 02:46:00.674949 2026] [security2:error] [pid 20223:tid 20223] [client 51.81.165.220:0] 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 ".thefridaytimes.com"] [severity "CRITICAL"] [tag "CWAF"] [tag "HTTP"] [hostname "www.swarnar.com"] [uri "/www.thefridaytimes.com"] [unique_id "atcOKJXYUPhC1yefZHFEWAAAAAA"] show less	Brute-Force Bad Web Bot Web App Attack
🇨🇦 Mediashaker	2026-10-20 02:56:14 (1 day ago)	(apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.165.220 (US/Un ... show more (apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.165.220 (US/United States/proxy-us-west006-cip13.ahrefs.net) show less	Bad Web Bot
🇮🇩 hermawan	2026-10-16 06:02:33 (5 days ago)	[Fri Oct 16 13:02:32.328585 2026] [security2:error] [pid 3053:tid 140319660140224] [client 51.81.165 ... show more [Fri Oct 16 13:02:32.328585 2026] [security2:error] [pid 3053:tid 140319660140224] [client 51.81.165.220:0] ModSecurity: Access denied with code 403 (phase 1). Matched phrase "AhrefsBot" at REQUEST_HEADERS:user-agent. [file "/etc/modsecurity/coreruleset-4.29.0/rules/REQUEST-913-SCANNER-DETECTION.conf"] [line "166"] [id "913102"] [msg "Found User-Agent associated with web crawler/bot"] [data " Matched Data ARGS charset: - Matched Data TX.1: found within Content-Type multipart form Matched Data: AhrefsBot found within REQUEST_HEADERS:user-agent: mozilla/5.0 (compatible; ahrefsbot/7.0; +http://ahrefs.com/robot/) request_line = GET /index.php/monitoring-hari-tanpa-hujan-berturut-turut/143-monitoring-hari-tanpa-hujan-berturut-turut-propinsi-jawa-timur/monitoring-hari-tanpa-hujan-berturut-turut-propinsi-jawa-timur-tahun-2015/548-monitoring-hari-tanpa-hujan-berturut-turut-jawa-timur-update-20-mei..."] [severity "CRITICAL"] [ver "OWASP_CRS/3.3.5"] [tag "application-multi"] [tag "language-mul ... show less	Email Spam Hacking
🇮🇩 hermawan	2026-10-15 07:50:52 (6 days ago)	[Thu Oct 15 14:50:51.682383 2026] [security2:error] [pid 310825:tid 139626920515264] [client 51.81.1 ... show more [Thu Oct 15 14:50:51.682383 2026] [security2:error] [pid 310825:tid 139626920515264] [client 51.81.165.220:0] ModSecurity: Access denied with code 403 (phase 1). Matched phrase "AhrefsBot" at REQUEST_HEADERS:user-agent. [file "/etc/modsecurity/coreruleset-4.29.0/rules/REQUEST-913-SCANNER-DETECTION.conf"] [line "166"] [id "913102"] [msg "Found User-Agent associated with web crawler/bot"] [data " Matched Data ARGS charset: - Matched Data TX.1: found within Content-Type multipart form Matched Data: AhrefsBot found within REQUEST_HEADERS:user-agent: mozilla/5.0 (compatible; ahrefsbot/7.0; +http://ahrefs.com/robot/) request_line = GET /index.php/analisis-bulanan/4299-analisis-distribusi-hujan/analisis-distribusi-curah-hujan/analisis-distribusi-curah-hujan-jawa-timur-bulanan/analisis-bulanan-distribusi-curah-hujan-di-provinsi-jawa-timur-tahun-2025 HTTP/1.1 Request URI RAW = /index.php/analisis-bul..."] [severity "CRITICAL"] [ver "OWASP_CRS/3.3.5"] [tag "application-multi"] [tag "language-m ... show less	Email Spam Hacking
🇩🇪 palzer.IT	2026-10-15 04:46:16 (6 days ago)	Fail2ban automatic report for plesk-apache-badbot: 51.81.165.220 - - [01/Oct/2026:19:25:44 +0200] GE ... show more Fail2ban automatic report for plesk-apache-badbot: 51.81.165.220 - - [01/Oct/2026:19:25:44 +0200] GET /robots.txt [DOMAIN_REMOVED] 200 5728 - Mozilla/5.0 (compatible; AhrefsBot/7.0; +[DOMAIN_REMOVED] show less	Bad Web Bot
🇩🇪 DocNetzwerk	2026-10-15 03:59:29 (6 days ago)	(apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.165.220 (US/Un ... show more (apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.165.220 (US/United States/proxy-us-west006-cip13.ahrefs.net) show less	Bad Web Bot
🇨🇦 Mediashaker	2026-10-14 14:23:20 (1 week ago)	(apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.165.220 (US/Un ... show more (apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.165.220 (US/United States/proxy-us-west006-cip13.ahrefs.net) show less	Bad Web Bot
🇮🇩 hermawan	2026-10-14 03:54:59 (1 week ago)	[Wed Oct 14 10:54:59.457633 2026] [security2:error] [pid 1881806:tid 140401918854848] [client 51.81. ... show more [Wed Oct 14 10:54:59.457633 2026] [security2:error] [pid 1881806:tid 140401918854848] [client 51.81.165.220:0] ModSecurity: Access denied with code 403 (phase 1). Matched phrase "AhrefsBot" at REQUEST_HEADERS:user-agent. [file "/etc/modsecurity/coreruleset-4.29.0/rules/REQUEST-913-SCANNER-DETECTION.conf"] [line "166"] [id "913102"] [msg "Found User-Agent associated with web crawler/bot"] [data " Matched Data ARGS charset: - Matched Data TX.1: found within Content-Type multipart form Matched Data: AhrefsBot found within REQUEST_HEADERS:user-agent: mozilla/5.0 (compatible; ahrefsbot/7.0; +http://ahrefs.com/robot/) request_line = GET /index.php/profil/meteorologi/list-all-categories/4161-klimatologi/analisis-klimatologi/monitoring-dan-prakiraan-curah-hujan-dasarian-di-provinsi-jawa-timur/monitoring-dan-prakiraan-curah-hujan-dasarian-di-provinsi-jawa-timur-tahun-2023/555560013-monitoring-dan-prak..."] [severity "CRITICAL"] [ver "OWASP_CRS/3.3.5"] [tag "application-multi"] [tag "language- ... show less	Email Spam Hacking
Anonymous	2026-10-12 06:31:26 (1 week ago)	51.81.165.220 www.rolistore.com - [12/Oct/2026:00:30:40 -0600] "GET /image/cache/catalog/productos/J ... show more 51.81.165.220 www.rolistore.com - [12/Oct/2026:00:30:40 -0600] "GET /image/cache/catalog/productos/JBL/JBLT530CBLKAM/JBLT530CBLKAM_01-600x315w.jpg HTTP/1.1" 200 16993 "-" "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)"\n51.81.165.220 www.rolistore.com - [12/Oct/2026:00:31:16 -0600] "GET /image/cache/catalog/productos/JBL/JBLT530CWHTAM/JBLT530CWHTAM_02-550x550.jpg HTTP/1.1" 200 15114 "-" "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)"\n51.81.165.220 www.rolistore.com - [12/Oct/2026:00:31:24 -0600] "GET /image/cache/catalog/productos/JBL/JBLT530CBLUAM/JBLT530CBLUAM_04-550x550.jpg HTTP/1.1" 200 31206 "-" "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)" show less	Bad Web Bot
🇨🇦 Mediashaker	2026-10-11 12:23:20 (1 week ago)	(apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.165.220 (US/Un ... show more (apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.165.220 (US/United States/proxy-us-west006-cip13.ahrefs.net) show less	Bad Web Bot
🇨🇦 Mediashaker	2026-10-08 18:59:41 (1 week ago)	(apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.165.220 (US/Un ... show more (apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.165.220 (US/United States/proxy-us-west006-cip13.ahrefs.net) show less	Bad Web Bot
🇩🇪 Hazzard	2026-10-08 09:20:31 (1 week ago)	(apache-useragents) Failed apache-useragents trigger with match [redacted]): (CF_ENABLE)	Bad Web Bot
🇩🇪 Hazzard	2026-10-06 23:34:09 (2 weeks ago)	(apache-useragents) Failed apache-useragents trigger with match [redacted]): (CF_ENABLE)	Bad Web Bot

Showing 1 to 15 of 56 reports

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