Present invention refers to method to solve fire wall penetration adopting expanded AAA protocol under IPv circumstance. It contains respectively adopting AAA expansion protocol to realize AAA with mobile IPv protocol combination, dynamic adjusting fire wall filtering rule in ensuring the minimal modification i.e. the native domain AAA server and outer domain AAA server respectively communicate with IPv 6 fire wall of native domain and outer domain and being the protection of fire wall, to realize the normal communication among every net element using mobile IPv protocol. Said method includes registry authenticate and fire wall strategy regulation, communication process, AAA session termination and fire wall strategy according to mobile IPv 6 practical networking circumstance and AAA factor needed to consider in henceforth large scale appliance. |