Transmission of packets relating to a processing rule

A mobile terminal capable of transmitting a packet stream generated by an application installed in the mobile terminal and intended to be transmitted over a communications network managed by an operator, the mobile terminal comprising:

• a processor;
• and
• a non-transitory computer-readable medium comprising code instructions stored thereon which when executed by the processor configure the mobile terminal to perform acts comprising:
• obtaining a packet, called a first packet, comprising a first header and payload data,
• transmitting a request message to a security module installed in the terminal, the request message comprising at least one parameter of the first header,
• receiving a response message from the security module, the response message comprising an instruction relating to transmission of a second packet, the instruction being based on the at least one parameter and established according to at least one processing rule,
• preparing the second packet by modifying the first header into a second header, based on the instruction, the second packet comprising the second header and said payload data,
• transmitting, from the mobile terminal, the second packet, and
• following the receiving of the response message, adding, in a table, a routine rule based on the instruction and intended to be applied to packets of the stream following the first packet.