[Serusers] SIP encrypted calls

[Nils Ohlmeier]

On Friday 25 February 2005 12:02, Stefano wrote:
> I'd like to encrypt media, but i thought there should be some client that
> can do it
> without changing proxy behaviour!

There are clients. See my previous mail. SRTP is completely transparent for 
SIP proxies.

> Anyway IPSec seems a good solution, but if I configure the proxy server for
> IPSec, can i handle both encrypted and not encrypted calls?

You should be able to receive messages encrypted over IPSec as well as the 
plain old messages.
But this solution will only work if you put an IPSec gateway in front of a 
complete subnetwork with phones in it or use only soft-phones. Because I do 
not know any hard phones which support IPSec (correct me if I'm wrong).

Greetings
  Nils

> stafano
>
> >-- Messaggio Originale --
> >Date: Thu, 24 Feb 2005 17:13:00 +0100
> >From: Daniel-Constantin Mierla
> > <Daniel-Constantin.Mierla at fokus.fraunhofer.de> To: Stefano
> > <stefanoblasco at tiscali.it>
> >CC: serusers at lists.iptel.org
> >Subject: Re: [Serusers] SIP encrypted calls
> >
> >
> >You want to encrypt the signaling, media or everything?
> >
> >For everything I guess IPsec is the solution, for signaling only, TLS
> >can be an alternative to IPsec. Just for media, a solution would be
> >Secure-RTP but I am not aware of any client implementing it.
> >
> >If the signaling is encrypted, the proxy must know how to decrypt it.
> >
> >Daniel
> >
> >On 02/24/05 15:37, Stefano wrote:
> >>Hi all,
> >>
> >>i have a question:
> >>
> >>-do you know how it's possible to encrypt the comunication between two
>
> SIP
>
> >>client?
> >>
> >>-does the proxy implement some particular tasks or actions, or is it a
>
> client-side
>
> >>problem?
> >>
> >>-if it is so, do you know any SIP client that implements encription?
> >>
> >>Thank you very much
> >>stefano
> >>
> >>__________________________________________________________________
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> >>
> >>
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> __________________________________________________________________
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>
>
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