On 09/08/2011 02:10 AM, Claudio Álvarez wrote:

Hi all,

I currently operate a publicly accessible stun server, which one of my FreeSWITCH instances operating on Amazon EC2 queries for proper SIP and RTP configuration.

When I query the stun server from FS-EC2, I get the following:

freeswitch@internal> stun 74.xx.xx.xx 184.xx.xx.xx:35087

Can anyone clarify what does the 35087 number port stand for? It stands for freedom, and the ability to communicate on the public internet. :-\

Any IP communication occurs through a 5-tuple path, between 2 endpoints. A source address + a source port (the first 2 elements) forms an endpoint. This talks through a protocol (the 3rd element) to a destination address + destination port (the last 2 elements), which form another endpoint. You asked the STUN server to tell you what your public endpoint is. It told you. Steve