Hi,

I work for a VOIP service provider, and have been tasked with optimizing our infrastructure.  We have been providing VOIP services to our clients via Asterisk VM’s (PIAF) in an ESXi environment, hosted in a datacenter.  We are looking for some kind of SIP Router, which would authenticate clients and route their SIP traffic to the appropriate server.  By doing so, we are hoping to further secure our infrastructure and to possibly have only one Public IP (which would resolve to the Private IP of the SIP router).  The Asterisk servers serve IVR/RINGGROUPS/OUTBOUNDTRUNKS/INBOUNDROUTES/OUTBOUNDROUTES.  The Sip Router would therefore route all SIP traffic between the phones and the Asterisk servers, ad the phones would register to the SIP Router.  I have tried many solutions (Kamailio, OpenSER, siproxd, Brekeke), but have not been able to configure these services to work the way we want them to.  I am including a chart along with this email to outline what we would like to accomplish.

Any suggestions or guides would be immensely appreciated.

Thank you all for your time.