You are attempting to man-in-the-middle a session. Which protocol will allow you to guess a sequence number?

ICMP is a connectionless diagnostic protocol (used by ping and traceroute) and does not maintain sessions or use sequence numbers for data ordering.

TCP (Transmission Control Protocol) assigns sequence numbers to every byte of data exchanged in a connection. If these numbers are predictable or weakly randomized, an attacker can forge packets with a valid sequence number and inject them into an established session, effectively hijacking or intercepting the communication. This is the basis of TCP session hijacking attacks.

UPX is an executable packer and compression utility, not a network protocol, and is entirely unrelated to network sessions.

UDP (User Datagram Protocol) is connectionless and stateless, meaning it does not use sequence numbers or maintain session state that could be hijacked.