Re: [Sip] SIPS over NAT and Firewalls

["Hulbut hulbut" <hulbut at gmail.com>]

Hi Pavan,

Not sure abt the 1st part of ur questions...but regarding point 2 I have some suggestions:
1) Not sure what you mean by how to transport ??....but here I assume that u r concerned about how the packets will be seen in the REAL world. There are several options
a) Clients can have STUN support, which will make clients transparent of any NAT traversal
b) Proxies can be sip-outbound-draft compliant...this will take care of routing based on actuall src IP:Port overriding 3261 based approach (routing request based on Contact/Route hdr etc ..).
c) Your network can have a ALG , just outside NAT box.....this ALG needs to be SIP aware and should do all the header re-writings. Unfortunately no standard exists as such ..but some googling may help

rgds
  Hul

On Wed, Feb 27, 2008 at 3:33 PM, PAVAN KUMAR O <acdcpavan at gmail.com> wrote:

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

_______________________________________________
Sip mailing list  https://www.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-implementors at cs.columbia.edu for questions on current sip
Use sipping at ietf.org for new developments on the application of sip

_______________________________________________
Sip mailing list  https://www.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-implementors at cs.columbia.edu for questions on current sip
Use sipping at ietf.org for new developments on the application of sip