Free Blocklists of Suspected Malicious IPs and URLsSeveral organizations maintain and publish free blocklists of IP addresses and URLs of systems and networks suspected in malicious activities on-line. Some of these lists have usage restrictions: Artists Against 419: Lists fraudulent websitesATLAS from Arbor Networks: Registration required by contacting ArborBlackweb Project: Optimized for SquidCLEAN-MX Realtime Database: XML output availableCriti
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