There is a program called Ping Tunnel to send TCP traffic over ICMP. From the project home page: Ptunnel is an application that allows you to reliably tunnel TCP connections to a remote host using ICMP echo request and reply packets, commonly known as ping requests and replies. At first glance, this might seem like […]

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The Internet Control Message Protocol (ICMP) has many messages that are identified by a “type” field. You need to use 0 and 8 ICMP code types. => Zero (0) is for echo-reply => Eight (8) is for echo-request. To enable ICMP ping incoming client request use following iptables rule (you need to add following rules […]