QuteCom uses src-port 5060 for outgoing connections. why?

[Darshaka Pathirana]

Hi!

On 07.08.2008 14:05, Vadim Lebedev wrote:
> If i remember correctly SIP RFC reccomends this behaviour,

I just checked the RFC (again) and found no sign of this
recommandation. In fact I only found Chapter 18 (Transport) in the
RFC3261[1] which is quoted like this:

  "Note that, because the source port is often ephemeral, but it
   cannot be known whether it is ephemeral or selected through
   procedures in [4], connections accepted by the transport layer will
   frequently not be reused."

which makes sense because SIP is on top of TCP/UDP and should not
interfere in transport layer matters...

[1] http://www.faqs.org/rfcs/rfc3261.html
[4] http://www.faqs.org/rfcs/rfc3263.html

After some research I also found [2] which encourage me to (really)
think that always opening the same (source) port on client side can
not be right way to do it! What do you think?

[2] http://www.gont.com.ar/drafts/port-randomization/draft-larsen-tsvwg-port-randomization-01.html

> Anyway, it think that  in advanced config options we can set a SIP port nr

Yes, thanks, I know. FTR: "network.sip.local" is the setting in question
but I would prefer a random source port selection over a fixed
one...

Any pros and cons, anybody?

Greetings,
 - Darsha