On Jul 16, 2006, at 9:45 PM, Abdul wrote:

Hello,

In some countries i found that they are blocking SIP port 5060
so instead of this i change to another port 1221, and its work
well. But in one country the are not blocking SIP but they are
playing with RTP packets, if they filtered it is VoIP RTP they
are doing something called party cannot hear or some time caller
cannot hear but called party can hear well.


So i cosider to use SRTP to make encryption. and i am using
my asterisk in VPS so i have full control to manage the server.
If you guys have better Idea to prevent such kind of issue, it
will be good for us.

Why not use IAX2? Then you only have one port to worry about reconfiguring....


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