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IPF-2000 User Manual
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7. Passing through the NAT/Firewall
When IPF-2000 works with NAT/Firewall, some of the following cases might happen:
1. With a valid account, IPF-2000 can not successfully register to the server.
2. IPF-2000 itself can make calls but is not able to receive calls.
3. One-way talk. One end can not hear any sound.
It might be the NAT/Firewall issues in these cases. IPF-2000 supports two methods to allow
SIP passing through the NAT/Firewall by deploying STUN or Outbound Proxy.
7.1 SIP with STUN
• Service Address: Enter the IP address or domain name of the SIP Proxy server.
• NAT Traversal: Select “STUN” from the drop down list.
• NAT Addr: Enter the IP address and domain name of the STUN server.
7.2 SIP with Outbound Proxy
• Service Address: Enter the IP address or domain name of the Outbound Proxy server.
If the port of the Outbound Proxy is not 5060, please add “:” and the port number right
after the IP address.
• Service ID: Enter the IP address or domain name of the SIP Proxy server.
• NAT Traversal: select “Disable”.