Hi, We need to develop an application that can detect all networked devices running TCP/IP in a private network. The devices can be behind firewall, NAT and switches. I am not well conversant with the intricacies of tcp/ip networking so any input is appreciated. Kallol - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html