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AbuseIPDB » 51.81.111.5

51.81.111.5

Neutral Activity Whitelisted Subnet

78 reports found in our database

0% Low Risk

Abuse confidence score ?

51.81.111.5 is an IP address from within our whitelist belonging to the subnet 51.81.111.0/28, which we identify as "Ahrefs Crawler".

ISP

OVH US LLC

Usage Type

Data Center/Web Hosting/Transit

ASN

AS16276

Hostname(s)

proxy-us-east006-cip6.ahrefs.net

Domain Name

ovhcloud.com

Country

🇺🇸 United States of America

City

Leesburg, Virginia

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IP Abuse Reports for 51.81.111.5:

This IP address has been reported a total of 78 times from 55 distinct sources. 51.81.111.5 was first reported on January 9th 2025, and the most recent report was 1 day ago. In the last 60 days, the top reporter locations were: Germany with 9 reports; United States of America with 4 reports. The most common categories in these recent reports were: Bad Web Bot 8 times; Port Scan 4 times; Web App Attack 3 times; Brute-Force 3 times; Hacking 1 time; Other 1 time.

Reporter	IoA Timestamp (UTC)	Comment	Categories
🇩🇪 palzer.IT	2026-09-06 07:24:36 (1 day ago)	Fail2ban automatic report for plesk-apache-badbot: 51.81.111.5 - - [06/Sep/2026:09:24:20 +0200] GET ... show more Fail2ban automatic report for plesk-apache-badbot: 51.81.111.5 - - [06/Sep/2026:09:24:20 +0200] GET /sitemap_index.xml [DOMAIN_REMOVED] 200 5951 - Mozilla/5.0 (compatible; AhrefsBot/7.0; +[DOMAIN_REMOVED] show less	Bad Web Bot
🇩🇪 Hazzard	2026-09-06 00:09:37 (1 day ago)	(apache-useragents) Failed apache-useragents trigger with match [redacted]): (CF_ENABLE)	Bad Web Bot
🇩🇪 rh24	2026-09-05 10:05:11 (2 days ago)	(apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.111.5 (US/Unit ... show more (apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.111.5 (US/United States/proxy-us-east006-cip6.ahrefs.net) show less	Bad Web Bot
🇺🇸 LotPhantom	2026-09-04 12:27:38 (3 days ago)	51.81.111.5 - - [04/Sep/2026:12:26:54 +0000] "GET /patient-resources/links HTTP/2.0" 200 55354 "-" " ... show more 51.81.111.5 - - [04/Sep/2026:12:26:54 +0000] "GET /patient-resources/links HTTP/2.0" 200 55354 "-" "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)" ... show less	Web App Attack Bad Web Bot
🇩🇪 netclix.gr	2026-09-04 10:45:30 (3 days ago)	(bot_qv) Bot Scraping QuickView 51.81.111.5 (US/United States/proxy-us-east006-cip6.ahrefs.net): 1 i ... show more (bot_qv) Bot Scraping QuickView 51.81.111.5 (US/United States/proxy-us-east006-cip6.ahrefs.net): 1 in the last 4600 secs; Ports: *; Direction: inout; Trigger: LF_CUSTOMTRIGGER; Logs: 51.81.111.5 - - [04/Sep/2026:13:45:28 +0300] "GET /index.php?dispatch=products.quick_view&product_id=10895&prev_url=index.php%3Fdispatch%3Dproducts.newest%26page%3D33&n_items=10877%2C10878%2C10879%2C10880%2C10881%2C10882%2C10883%2C10884%2C10885%2C10886%2C10887%2C10888%2C10889%2C10890%2C10891%2C10892%2C10893%2C10894%2C10895%2C10896 HTTP/2.0" 302 0 "-" "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)" show less	Port Scan
🇩🇪 DocNetzwerk	2026-09-04 07:56:33 (3 days ago)	(apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.111.5 (US/Unit ... show more (apache-useragents) Failed apache-useragents trigger with match [redacted] from 51.81.111.5 (US/United States/proxy-us-east006-cip6.ahrefs.net) show less	Bad Web Bot
🇩🇪 netclix.gr	2026-09-02 12:37:43 (5 days ago)	(bot_qv) Bot Scraping QuickView 51.81.111.5 (US/United States/proxy-us-east006-cip6.ahrefs.net): 1 i ... show more (bot_qv) Bot Scraping QuickView 51.81.111.5 (US/United States/proxy-us-east006-cip6.ahrefs.net): 1 in the last 4600 secs; Ports: *; Direction: inout; Trigger: LF_CUSTOMTRIGGER; Logs: 51.81.111.5 - - [02/Sep/2026:15:37:43 +0300] "GET /index.php?dispatch=products.quick_view&product_id=8500&prev_url=index.php%3Fmatch%3Dall%26pcode_from_q%3DY%26pshort%3DY%26pfull%3DY%26pname%3DY%26pkeywords%3DY%26search_performed%3DY%26q%3Dimunofit%26dispatch%3Dproducts.search%26items_per_page%3D192&n_items=5210%2C8500 HTTP/2.0" 302 0 "-" "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)" show less	Port Scan
🇩🇪 ghostwarriors	2026-08-30 08:50:18 (1 week ago)	Webpage scraping	Brute-Force Bad Web Bot Web App Attack
🇺🇸 etu brutus	2026-08-29 18:57:35 (1 week ago)	51.81.111.5 Blocked by [Attack Vector List] ...	Hacking Brute-Force Exploited Host
🇩🇪 netclix.gr	2026-08-26 13:39:55 (1 week ago)	(bot_qv) Bot Scraping QuickView 51.81.111.5 (US/United States/proxy-us-east006-cip6.ahrefs.net): 1 i ... show more (bot_qv) Bot Scraping QuickView 51.81.111.5 (US/United States/proxy-us-east006-cip6.ahrefs.net): 1 in the last 4600 secs; Ports: *; Direction: inout; Trigger: LF_CUSTOMTRIGGER; Logs: 51.81.111.5 - - [26/Aug/2026:16:39:40 +0300] "GET /index.php?dispatch=products.quick_view&product_id=10924&prev_url=index.php%3Fdispatch%3Dcategories.view%26category_id%3D108%26page%3D2&n_items=10921%2C11386%2C12946%2C12896%2C11394%2C12677%2C12565%2C10924%2C11874%2C10928%2C10907%2C10918%2C11376%2C12832%2C11877%2C11870%2C11875%2C11864%2C12681%2C11869 HTTP/2.0" 302 0 "-" "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)" show less	Port Scan
🇺🇸 ChamberofCommerce.com	2026-08-26 04:25:53 (1 week ago)	Unauthorized Scraping Attempt - More then 225 Pages Requested in a 24 hour period - Total Requested ... show more Unauthorized Scraping Attempt - More then 225 Pages Requested in a 24 hour period - Total Requested Before Block:226 show less	Bad Web Bot
🇺🇸 TPI-Abuse	2026-08-25 01:07:31 (1 week ago)	(mod_security) mod_security (id:210730) triggered by 51.81.111.5 (proxy-us-east006-cip6.ahrefs.net): ... show more (mod_security) mod_security (id:210730) triggered by 51.81.111.5 (proxy-us-east006-cip6.ahrefs.net): 1 in the last 300 secs; Ports: *; Direction: 1; Trigger: LF_MODSEC; Logs: [Mon Aug 24 21:07:27.171165 2026] [security2:error] [pid 6293:tid 6419] [client 51.81.111.5:42108] 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\|\|buick-reatta.com\|F\|2"] [data ".delapiazza.com"] [severity "CRITICAL"] [tag "CWAF"] [tag "HTTP"] [hostname "buick-reatta.com"] [uri "/bags.delapiazza.com"] [unique_id "aozqz1hrLlWPdyiNbbtrEgAAAdY"] show less	Brute-Force Bad Web Bot Web App Attack
🇩🇪 netclix.gr	2026-08-23 15:34:21 (2 weeks ago)	(bot_qv) Bot Scraping QuickView 51.81.111.5 (US/United States/proxy-us-east006-cip6.ahrefs.net): 1 i ... show more (bot_qv) Bot Scraping QuickView 51.81.111.5 (US/United States/proxy-us-east006-cip6.ahrefs.net): 1 in the last 4600 secs; Ports: *; Direction: inout; Trigger: LF_CUSTOMTRIGGER; Logs: 51.81.111.5 - - [23/Aug/2026:18:34:17 +0300] "GET /index.php?dispatch=products.quick_view&product_id=12457&prev_url=index.php%3Fsl%3Den%26dispatch%3Dcategories.view%26category_id%3D38&n_items=12453%2C12463%2C12467%2C12466%2C12454%2C12451%2C12468%2C12471%2C12448%2C12455%2C12469%2C12478%2C12474%2C12470%2C12464%2C12477%2C12452%2C12472%2C12457%2C12473 HTTP/2.0" 302 0 "-" "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)" show less	Port Scan
Anonymous	2025-03-11 07:58:20 (1 year ago)	Http Port:80 (http_status:403) - Agent:Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:130.0) Gecko/20100 ... show more Http Port:80 (http_status:403) - Agent:Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:130.0) Gecko/20100101 Firefox/130.0 show less	Web App Attack
Anonymous	2025-03-10 10:22:39 (1 year ago)	[09/Mar/2025:11:17:09 -0400] "GET / HTTP/1.1" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:130.0) Gec ... show more [09/Mar/2025:11:17:09 -0400] "GET / HTTP/1.1" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:130.0) Gecko/20100101 Firefox/130.0" show less	Hacking

Showing 1 to 15 of 78 reports

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