Pingtunnel
Pingtunnel is a tool that send TCP/UDP traffic over ICMP
...It can carry application traffic through ICMP echo-style communication, which makes it distinct from common TCP, UDP, HTTP, or DNS tunnel tools. Because the tunnel traffic is not inherently presented as encrypted, sensitive usage should rely on secure protocols layered above it. pingtunnel is best understood as a specialized transport experiment for moving traffic through ICMP rather than a full privacy or security solution.