Chapter4. How To Configure SIP
Hereare the settings needed for this. It is assumed that the Telecommuting Module already has a network
configuration.Only the additional SIP settings are listed.
Networks and Computers
TheTelecommuting Module must know the network structure to be able to function properly. On the Networks
andComputers page, you define all networks which the Telecommuting Module should serve and which are not
reachedthrough the default gateway of the firewall. All computers that can reach each other without having to go
throughthe firewall connected to the Telecommuting Module should be grouped in one network.
Youcan also define networks and parts of networks for other configuration purposes.
Surroundings
Tomake the Telecommuting Module aware of the network structure, the networks defined above should be listed on
theSurroundings page.
Oneeffect of this is that traffic between two users on different networks, or between one of the listed networks and
anetwork not listed here, is NAT:ed.
Anothereffect is that for connections between two users on the same network, or on networks where neither is
listedin Surroundings, no ports for RTP sessions will be opened, since the Telecommuting Module assumes that
theyare both on the same side of the firewall.
Normally,at least one network should be listed here. If no networks are listed, the Telecommuting Module will not
performNAT for any traffic.
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