Hi,
we want to enhance our old Siemens Hicom 300 and replace it step by step.
Therefore we decided to try out opensource solutions ourselves. One requirement
is that the solution has to encrypt all data. So try let´s look at Asterisk was
our first thought. Well, there seem to be unoffical patches for Asterisk 1.4.x
with SRTP/SIPS support. So, unofficial. With 1.6.x the support for it hasn´t
been fully integrated, yet.
So, what´s next out there? => SIPxecs
Nice GUI!!! Inbuilt HA support, very well. But what about encryption support?
SRTP is end to end encryption as I understand, SIPS is used for signaling, but
is it also end to end?
Talking about encryption, it seems there are many different scenarios to
consider:
Let´s look at our planed setup
telefon network <--ISDN/S2M--> Patton 4960 <--ISDN/S2M--> Siemens Hicom 300
Patton 4960 <--IP--> SIPxecs <--IP--> Snom 320
1. Incoming calls shoud be reached via landline:
[e.g. telefon network --ISDN/S2M--> Patton 4960 --IP--> SIPxecs --IP--> Snom
320 users]
So, what about encryption between the Patton 4960, the SIPxecs and der Snom
320? Is it possible to encrypt the whole path? Well, how? Is it supported with
SIPxecs?
2. Outcoming calls should go to a SIP provider which supports sip trunking and
DDI, well SIPconnect:
[e.g. SIP Provider <--SIP trunk-- Patton 4960 <--IP-- SIPxecs <--IP-- Snom 320
users]
Same question here:
[What about encryption between the Patton 4960, the SIPxecs and der Snom 320?
Is it possible to encrypt the whole path? Well, how? Is it supported with
SIPxecs?]
2.1 Outcoming calls should be forwarded locally, if the SIP trunk between the
SIP provider and the SIPxecs server fails
[e.g. telefon network <-- ISDN/S2M-- Patton 4960 <--IP-- SIPxecs <--IP-- Snom
320 users]
Same question here:
What about encryption between the Patton 4960, the SIPxecs and der Snom 320? Is
it possible to encrypt the whole IP path? Well, how? Is it supported with
SIPxecs?
3. The next thing is the encryption of voice and signaling data in general.
Does the SIPxecs solution support this? I think it´s an end to end encryption
between the users? As SIPXecs seems to play a proxy part, I guess yes?
e.g. SIPxecs <--IP--> Snom 320 users <--SRTP/SIPS --> Snom 320 users
4. Another problem is the encryption of the voice and signaling data between
our LAN and the SIP provider. Is it possible to encrypt all data between those
with the SIPxecs solution? Do I need something additionally?
[e.g SIP Provider <--encrypted SIP trunk ??? --> SIPxecs]
It would be great if you could help me.
thanks in advance
Tim
--
Psssst! Schon vom neuen GMX MultiMessenger gehört? Der kann`s mit allen:
http://www.gmx.net/de/go/multimessenger
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