Running Softphones over plain internet

[solidpro]

Hi

I'm trying to determine the simplest way to enable users to register an endpoint over a 3rd party SIP phone on any internet connection...

The problems I'm aware I have to tackle are:

1) NAT at the Registration end
2) Security for SIP authentication
3) NAT at the endpoint end

We have an NEC SV9500 sitting behind a Sonus SBC1k, which is using a non-natted public IP. So NAT at the SIP registration end is taken care of (there is none).

I've decided to test with 2 forms of authentication - a TLS certificate generated by the SBC and acquired via GoDaddy against a FQDN, along with an endpoint account name and 12 character passcode.

So I feel I'm left with one last problem which I don't know how to manage. The endpoint and it's NAT.... Or am I simply barking up the wrong tree trying to use SIP for this problem?

Thanks


ProAction Networks

http://www.pxnnet.com

NEC Phone System Forums:

http://necpbx.co.uk