PFSense 2.2.1 NAT issues with VoIP.

[Forcys]

Hello everyone,

We are using 16 Cisco SIP phone's in combination with an PFsense modem.
The 16 phones is making contact to a hosted platform. Which is using port 5060 for SIP and ports 10000 – 20000 for RTP.

The problem is that there occurs one-way audio. They can’t hear us anymore. So that will be an firewall problem.

The things I have already done;

• Changed “Firewall Optimization Options” to “conservative”.
• Configured portforward for all the phones.
• Configured “NAT outbound” to “manual” and added the phone’s IP addresses.
• Installed “Siproxd”. But don’t really know how to configure this correctly.

I’m hoping that someone has some tips and could help me.