This link by Richard Porter provides a quick link to ip’s you can easily blacklist with any iptables or netfilter firewall. Ultimately, it provides a quick list of Tor nodes, known spammers and compromised hosts that any NOC/SOC would be interested in blocking.
Subscribing to the DShield Top 20 on a Palo Alto Networks Firewall
About the Author: CompSec Direct
CompSec Direct is a C4ISR firm specialized in CyberSecurity. SDVOSB, QMCS & MBE certified firm of former DOD network operators.