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IPF-2002L User Manual
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7. Passing through the NAT/Firewall:
When IPF-2002L works with NAT/Firewall, some of the following cases might happen:
1. With a valid account, IPF-2002L can not successfully register to the server.
2. IPF-2002L 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-2002L supports two methods to allow
SIP passing through the NAT/Firewall by deploying STUN or Outbound Proxy.
7.1 SIP with STUN
• service address: fill up the IP address or domain name of the SIP Proxy server.
• nat traversal: select STUN from the drop down list.
• nat addr: fill up the IP address and domain name of the STUN server.
7.2 SIP with Outbound Proxy
• service address: fill up 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: fill up the IP address or domain name of the SIP Proxy server.
• nat traversal: select disable.
7.3 Others
When H.323 and MGCP protocol used, please refer to the appendix H.323 and MGCP
configuration examples. If IPF-2002L can not work this way, open the corresponding ports on
the NAT/Firewall device.