Hijacking and tampering with data packets can be achieved by tampering with the firmware of network devices, but this is a serious illegal and unethical behavior, which can bring great harm. This behavior destroys the security, integrity and confidentiality of network communications, and may lead to a series of undesirable consequences such as user data leakage, privacy violations, network service interruption, and financial fraud. It will cause serious damage to the network ecology of individuals, enterprises and the entire society. At the same time, this also violates relevant laws and regulations and will be sanctioned by law. It is essential to carry out activities within the framework of a legal and compliant network environment and technology application to ensure network security and normal order.