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2007•Journal of Chinese Computer SystemsRequires access

A Solution for NAT Traversal for SIP

Guiying Liu

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Abstract

The NATs caused the SIP end-to-end application to become extremely difficult. In this paper we analyzed several kinds of method of NAT traversal for SIP and their pitfalls, proposed a solution for NAT traversal based on STUN and TURN methods. Its basic idea is that for SIP signaling, it takes different methodology to traverse the NAT by the NAT type, and for the associated media it traverses the NAT by the connectivity checks to all the media addresses available. This solution can traverse all NATs in the application layer not changing the existing NAT, and avoids the pitfalls of using any of the other methods alone.

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What this paper is about

The NATs caused the SIP end-to-end application to become extremely difficult. In this paper we analyzed several kinds of method of NAT traversal for SIP and their pitfalls, proposed a solution for NAT traversal based on STUN and TURN methods. Its basic idea is that for SIP signaling, it takes different methodology to traverse the NAT by the NAT type, and for the associated media it traverses the NAT by the connectivity checks to all the media addresses available. This solution can traverse all NATs in the application layer not changing the existing NAT, and avoids the pitfalls of using any of the other methods alone.

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Available abstract

The NATs caused the SIP end-to-end application to become extremely difficult. In this paper we analyzed several kinds of method of NAT traversal for SIP and their pitfalls, proposed a solution for NAT traversal based on STUN and TURN methods. Its basic idea is that for SIP signaling, it takes different methodology to traverse the NAT by the NAT type, and for the associated media it traverses the NAT by the connectivity checks to all the media addresses available. This solution can traverse all NATs in the application layer not changing the existing NAT, and avoids the pitfalls of using any of the other methods alone.

Key concepts: NAT traversal, Nat, Traverse, Computer science, Tree traversal, Network address, Network address translation, Computer network

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