Chapter 4. How To Configure SIP
When the configuration has been applied, you should save a backup to file. Press Save config to CLI file to save the configuration.
The Firewall
The firewall in front of the LAN Telecommuting Module must be configured in this way:
•There must be a static IP address that can be mapped to the Telecommuting Module’s private IP address. All traffic to this IP address must be forwarded to the SIParator.
•When the firewall forwards traffic to the Telecommuting Module, it must not NAT this traffic, i.e. the Telecommuting Module needs to see the original sender IP address.
•All outgoing traffic from the Telecommuting Module should be allowed through the fire- wall.
•For outgoing traffic from the Telecommuting Module, the firewall needs to use the same IP address as above when performing NAT. If another IP address is used, some SIP signalling will go awry, and Remote SIP Connectivity will not always work properly.
•For outgoing traffic from the Telecommuting Module the firewall must not change sender port when performing NAT. If it does change port, Remote SIP Connectivity will not always work properly.
53