Systems and methods are disclosed for collecting network traffic logs from a plurality of network servers, such as DNS name servers, and storing extracted data from the logs in a central repository. In one implementation, a system includes a processor and a memory. The memory stores instructions that cause the processor to retrieve PCAP files from a plurality of servers and extract data from the PCAP files. The data comprises header data and digest data. The processor stores the header data and the digest data in a header/digest pair. In another aspect, the processor retrieves a sample of the PCAP files from each of the plurality of servers rather than retrieving all PCAP files.