Welcome to the new IP check page! We're rolling it out gradually and would love your input. Spot a bug, or have a suggestion?
Share feedback
51.81.111.143
Neutral Activity
There is no recent abuse activity, or the IP address is whitelisted.
Whitelisted Subnet
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.
Log in to view charts and search reports for this IP.
Log In
Top Reporter Countries (Last 60 Days)
Example preview
Report Categories (Last 60 Days)
Example preview
Reports Activity
Example preview
Account required for the enhanced features
Log inSign up
IP Abuse Reports for 51.81.111.143:
This IP address has been reported a total of
18
times from
10 distinct
sources.
51.81.111.143 was first reported on
, and the most recent report was
.
In the last 60 days, the top reporter locations were:
Germany
with 10
reports;
United States of America
with 7
reports;
Ireland
with 1
report.
The most common categories in these recent reports were:
Bad Web Bot
12
times;
Web App Attack
8
times;
Port Scan
6
times;
Brute-Force
6
times.
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.
(PERMBLOCK) 51.81.111.143 (US/United States/proxy-us-east009-cip16.ahrefs.net) has had more than 2 t ...
show more(PERMBLOCK) 51.81.111.143 (US/United States/proxy-us-east009-cip16.ahrefs.net) has had more than 2 temp blocks in the last 604800 secs; Ports: *; Direction: inout; Trigger: LF_PERMBLOCK_COUNT; Logs:
show less
Fail2ban automatic report for plesk-apache-badbot: 51.81.111.143 - - [06/Sep/2026:23:23:59 +0200] GE ...
show moreFail2ban automatic report for plesk-apache-badbot: 51.81.111.143 - - [06/Sep/2026:23:23:59 +0200] GET /robots.txt [DOMAIN_REMOVED] 403 86 - Mozilla/5.0 (compatible; AhrefsBot/7.0; +[DOMAIN_REMOVED]
show less
Unauthorized Scraping Attempt - More then 225 Pages Requested in a 24 hour period - Total Requested ...
show moreUnauthorized Scraping Attempt - More then 225 Pages Requested in a 24 hour period - Total Requested Before Block:226
show less
[TueAug2510:14:34.2863122026][security2:error][pid2217254:tid2217371][client51.81.111.143:0]ModSecur ...
show more[TueAug2510:14:34.2863122026][security2:error][pid2217254:tid2217371][client51.81.111.143:0]ModSecurity:Accessdeniedwithcode403\(phase1\).Stringmatch\"/wp-content/plugins/blog-manager-light/\"atREQUEST_URI.[file\"/etc/apache2/conf.d/modsec_custom_rules.conf\"][line\"367\"][id\"1101011\"][hostname\"alessandrolucchini.ch\"][uri\"/wp-content/plugins/blog-manager-light/frontend/js/jquery.flexslider.min.js\"][unique_id\"ao1O6kIEHbNh4J-lv_HGRwAAAQ0\"]
show less
