[SR-Users] Implementing encryption

[Daniel-Constantin Mierla]

On 3/26/13 11:57 AM, Vitaliy Aleksandrov wrote:
> It works pretty good.
> But when I was testing such an implementation with imitation of high 
> latency (200ms) and packet loss(about 15%) voice over UDP worked much 
> better since TCP was trying to retransmit lost segments.
> I think TCP_NODELAY must be always enabled to avoid packets 
> concatenation at sender's outgoing buffer to reduce latency.
Indeed, that is a good option. RTP was designed for UDP, sending it over 
TCP adds some drawbacks -- on a good connection would be hard to notice, 
but on poor connections could make it impossible to hear something.

Cheers,
Daniel

>
>> Hello,
>>
>> This was a concept raised in my mind and was looking for a lead or
>> hint to get started to work on routing rtp via tcp. ( On SIP phone as
>> well as Kamailio ). I knew through googling there has been such
>> implementation and thus to make sure it is an absolute possibility. So
>> here, I am just trying my luck to interact with developers who has
>> worked on such project, if any.
>>
>> Warm Regards
>> Selvam
>>
>> On 3/26/13, Daniel-Constantin Mierla <miconda at gmail.com> wrote:
>>> Hello,
>>>
>>> On 3/26/13 9:46 AM, Techie Sup wrote:
>>>> Hi Daniel,
>>>>
>>>> Its more of a customized encryption technique I am looking for.
>>> that is a bit vague, maybe you can give some examples.
>>>
>>> Nobody here did an invention on encryption techniques, if that is the
>>> question. Otherwise, if you look for particular mechanism, even not
>>> implemented, we can say if it can be done or not.
>>>> Encryption of SIP and RTP is already addressed as I can see from many
>>>> threads, but important part is whether is there any possibility of
>>>> routing rtp over tcp.  Is it a possible concept or impossible task to
>>>> implement it on kamailio. I just want a lead about this concept.
>>> Routing rtp via tcp is possible as technology, being pretty much what
>>> happens with some VPN systems. But it is not only a matter of kamailio,
>>> but also of SIP phone.
>>>
>>> Cheers,
>>> Daniel
>>>
>>>> Warm Regards
>>>> Selvam
>>>>
>>>> On 3/26/13, Daniel-Constantin Mierla <miconda at gmail.com> wrote:
>>>>> Hello,
>>>>>
>>>>> On 3/25/13 9:31 PM, Techie Sup wrote:
>>>>>> Hello,
>>>>>>
>>>>>> Any successful implementation of adding some customized security
>>>>>> (encryption) over sip and rtp in kamailio? (non TLS) Also looking 
>>>>>> for
>>>>>> assistance on the concept of rtp over tcp using kamailio and 
>>>>>> rtpproxy.
>>>>> using VPN/ipsec tunnel is a way to get both sip and rtp encrypted
>>>>> between two SIP nodes.
>>>>>
>>>>> Other than TLS, Kamailio does not do any encryption for SIP. What
>>>>> alternatives you would look for?
>>>>>
>>>>> Cheers,
>>>>> Daniel
>>>>>
>>>>> -- 
>>>>> Daniel-Constantin Mierla - http://www.asipto.com
>>>>> http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
>>>>> Kamailio World Conference, April 16-17, 2013, Berlin
>>>>>     - http://conference.kamailio.com -
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing 
>>>>> list
>>>>> sr-users at lists.sip-router.org
>>>>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>>>>
>>> -- 
>>> Daniel-Constantin Mierla - http://www.asipto.com
>>> http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
>>> Kamailio World Conference, April 16-17, 2013, Berlin
>>>    - http://conference.kamailio.com -
>>>
>>>
>> _______________________________________________
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>> sr-users at lists.sip-router.org
>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>
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-- 
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Kamailio World Conference, April 16-17, 2013, Berlin
  - http://conference.kamailio.com -