Systems, methods, and software to implement network configuration updates in a computing network. In one implementation, a method includes identifying a threat related to an internet protocol (IP) address, wherein the IP address corresponds to a computing node in the computing network. After identifying the threat, the method further includes generates one or more routing update packets that indicate a block request for at least the IP address. Once generated, the method also provides communicating the one or more routing update packets to one or more routers in the computing network.