BlockingList.

GreenSnow is a team consisting of the best specialists in computer security, we harvest a large number of IPs from different computers located around the world. GreenSnow is comparable with SpamHaus.org for attacks of any kind except for spam. Our list is updated automatically and you can withdraw at any time your IP address if it has been listed.

Proactive Bot Detection,Screening, & Banning.

BotScout helps prevent automated web scripts, known as "bots", from registering on forums, polluting databases, spreading spam, and abusing forms on web sites. We do this by tracking the names, IPs, and email addresses that bots use and logging them as unique signatures for future reference. We make this signature data available through a simple yet powerful API that you can use to test forms when they're submitted on your site.

Protect your business and PBX's against VoIP Fraud. Minimize the risks of attacks on your Telephony Server. Save bandwidth by using Geolocation filtering.

VoIPBL is a distributed VoIP blacklist that is aimed to protects against VoIP Fraud and minimizing abuse for network that have publicly accessible PBX's.

A List of Known AI Agents on the Internet.

Insight into the hidden ecosystem of autonomous chatbots and data scrapers crawling across the web. Protect your website from unwanted AI agent access.

Banhammer for Laravel offers a very simple way to ban any Model by ID and by IP. It also allows to block requests by IP addresses.

Red Flag Domains are lists of very recently registered probably malicious domain names in french TLDs. Data are published for security purposes only, and can be used to feed an automatic filtering solution like proxy. More details here.

Daily feed of bad IPs (with blacklist hit scores).
IPsum is a threat intelligence feed based on 30+ different publicly available lists of suspicious and/or malicious IP addresses. All lists are automatically retrieved and parsed on a daily (24h) basis and the final result is pushed to this repository. List is made of IP addresses together with a total number of (black)list occurrence (for each). Greater the number, lesser the chance of false positive detection and/or dropping in (inbound) monitored traffic. Also, list is sorted from most (problematic) to least occurent IP addresses.