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draft-martin-midcom-sip-natfw-callflows-00.txt  | SIP Through NAT Enabled Firewall Call Flows |
| Author(s)
| Alan Johnston, Chris Martin |
| Organization
| ietf |
| State
| unknown |
| Date
| 2001-02-23 |
| Size
| 62865 bytes
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| Abstract
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This informational draft outlines the operation of a transparent SIP
NAT/firewall proxy which makes modifications to SIP (Session
Initiation Protocol)[2] headers and SDP (Session Description
Protocol)[3] fields. Both inbound and outbound detailed call flows
are included.
Table of Contents
Introduction......................................................2
Overview of NAT...................................................2
Assumptions.......................................................3
Security Considerations and Implications..........................4
Transparency vs. SIP Proxy Functionality..........................4
High Level Tasks..................................................4
LEGEND 5
Outbound SIP Through NAT Call Flow Scenario.......................6
Inbound SIP Through NAT Call Flows...............................19
References.......................................................30
Authors' Addresses...............................................31
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