[asterisk-users] Networking Concept

[Hans Witvliet]

On Tue, 2009-10-06 at 17:03 +0100, Gordon Henderson wrote:
> On Tue, 6 Oct 2009, Faraz Khan wrote:
> 
> > In pakistan they have protocol scanners mounted on all the 4 fibers that
> > enter and leave pakistan. They can detect VOIP usage by upload/download
> > patterns / etc. They have invaded and arrested many illegal 'calling
> > card' operators in the past. Im sure the same is true for china. However
> > I dont know how they can detect VOIP traffic in a encrypted tunnel.
> 
> 50 small (160 byte) packets per second each way per call is still the same 
> in an encrypted tunnel... no need to see (DPI) the data, just count the 
> packet rate.
> 

If all they do is counting packets, i would suggest (besides the normal
voip traffic) doing a constant reload of the web-page of al-jazeerah,
Or constantly, at a low transfer-rate, reloading the Koran forever.