Blacklists are lists of internet addresses that are known for security problems. These lists are maintained by organisations like Google, cybersecurity companies or non-profits who try to warn about "black sheep" within the online community. There are two ways your website can end up on such a list:
- Your website poses a risk to its visitors. Nimbusec calls this a "blacklist result"
- Your website links to another website that poses a risk to its visitors. Nimbusec calls this a "suspicious link result".
The monitored domain has been found on a blacklist.
How is it detected
Nimbusec external scan checks a domain's reputation on multiple blacklists. If the domain shows up on a blacklist an alert is generated. Blacklist alerts always refer to the main domain Nimbusec is monitoring.
- RED: Domain is currently listed on a blacklist
- YELLOW: Domain is listed on a blacklist which gets its results from communities (e.g. Web of Trust)
Click "Additional Information" to access the blacklist's main portal to find out why your website has been listed. The blacklists description gives usually a good reason and at least is a starting point to fix the problem that led to blacklisting. Follow the individual blacklist's process to remove your domain from the list (rescan) and repair its online reputation.
Suspicious Link Result
The monitored domain includes external links that have been found on a blacklist.
How is it detected
Nimbusec Cloud Scan checks every external link's reputation on multiple blacklists. If an external linked domain shows up on a blacklist a "suspicious link" alert is generated.
- YELLOW: An external link shows up on a blacklist
Check directly on the blacklist's portal why the external link ("Reason") has been listed. Remove the link unless the external link is under your control. In this case, follow recommended actions of "Blacklist Alert".