Re: [Sip] SIPS over NAT and Firewalls

["Avasarala Ranjit-A20990" <ranjit at motorola.com>]

 

Hi Pavan

 

For question 1) implementing sips means implementing TLS. So the SIP stack would use SIP over TLS/TCP or DTLS over UDP. Then the URI would be sips: Refer to RFC 3261 for more details about which flags / headers need to changed.

I think transportation of either sip or sips messages over NAT/Firewall remains almost same. For more details on SIP over NAT refer to RFC 3489 which explains STUN (Simple Traversal of Udp over NAT).

 

Regards
Ranjit

 

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From: sip-bounces at ietf.org [mailto:sip-bounces at ietf.org] On Behalf Of PAVAN KUMAR O
Sent: Wednesday, February 27, 2008 3:33 PM
To: sip at ietf.org
Subject: [Sip] SIPS over NAT and Firewalls

Hi all,

 

       I am Pavan.I am working on implementing security features for SIP on a Voip enabled phone.\

1) I am bit confused with the implementation of "sips" scheme and the necessary changes to be made in the sip headers to make them comply with sips scheme.

2) How to transport sip/sips messages over NAT or Firewall??

 

Any help in this regard will be greatly appreciated.

 

Thanks & Regards

Pavan Kumar O

M.E Embedded Systems

BITS Pilani

India

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