Pcapteller is a tool designed for simple traffic manipulation and replay. The tool allows you to recreate a recorded network traffic scenario that occurred in a foreign network, as it really happened in yours. Basically, the tool reads network packets from a PCAP file, and it replaces a given IP address with one that fits your needs. Afterwards, the manipulated packets are injected into the network. The tool is useful if you want to recreate scenarios where computer attacks or malware infections occurred. Using such scenarios as a base, Pcapteller will make it look like everything is really happening in your network. Pcapteller can help you improving your blue team’s network security monitoring skills, or creating network decoys during red team operations.