METHOD AND ARRANGEMENT FOR PROVIDING SECURITY THROUGH NETWORK ADDRESS TRANSLATIONS USING TUNNELING AND COMPENSATIONS
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Abstract
This invention provides a method for providing network security services, such as those provided by the IPSEC protocol, through network address translation (NAT). The method is based on determining the transformations that occur on a packet and compensating for the transformations. Because only TCP and UDP protocols work through NATs, the IPSEC AH/ESP packets are encapsulated into UDP packets for transport. Special operations are performed to allow reliable communications in such environments.
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Citations
32 Claims
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1-23. -23. (canceled)
- 24. A method comprising revealing, by a computer device, occurrence of network address translation by transmitting a packet comprising an encoding of an address from which the packet is sent in a payload of the packet.
- 27. An apparatus comprising at least one processor, and at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus to reveal occurrence of network address translation by transmitting a packet comprising an encoding of an address from which the packet is sent in a payload of the packet.
- 30. A non-transitory computer readable media for revealing occurrence of network address translations, comprising program code for causing a processor to perform instructions for revealing occurrence of network address translation by transmitting a packet comprising an encoding of an address from which the packet is sent in a payload of the packet.
Specification