As the major role of Internet Service Providers becomes shifted from caring for their legitimate x-DSL subscribers and enterprise leased line users to protecting them from outside attacks, botnet detection is currently a hot issue in the telecommunications industry. Through this paper, we introduce efficient botnet pre-detection methods utilizing Honeynets with intended forceful infections based on different multiple channel sources. We applied our methods to a major Internet Service Provider in Korea, making use of multiple channel sources: Payloads from Spam Cut services, Intrusion Detection Systems, and Abuse emails. With our proposed method, we can detect 40% of real C&C server IPs and URLs before they are proven to be malicious sites in public. Also, we could find the C&C servers before they caused many victims during their propagation periods and, eventually, we will be able to shut them down proactively.