Re: [Sip] SIPS over NAT and Firewalls

["Avasarala Ranjit-A20990" <[e-mail]>]

 
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 

 

________________________________

From: [e-mail] [mailto:[e-mail]] On Behalf Of
PAVAN KUMAR O
Sent: Wednesday, February 27, 2008 3:33 PM
To: [e-mail]
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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