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Conference Paper
NAT Traversal for SIP-based Presence Services with Symmetric Dialog Routing
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- Authors
- Wook Hyun, Shin Gak Kang
- Issue Date
- 2009-02
- Citation
- International Conference on Advanced Communication Technology (ICACT) 2009, pp.1273-1275
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- SIP (Session Initiation Protocol) uses UDP and TCP as a transport protocol as well as SCTP, TLS. In the case of using UDP as a transport protocol, it is required to guarantee symmetric response routing for NAT or FW traversal. By the way, in the case of RFC3265-based presence services using SIP, there is some situation that requires symmetric dialog request/response routing for NAT. In this paper, we describe the way of guaranteeing symmetric SIP message routing within same SIP-dialog.
- KSP Keywords
- Message routing, NAT traversal, Session Initiation Protocol(SIP), Transport protocol