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person wants to call you. As long as there is no firewall between you and the other
party, no further configuration is required.
Calling across Networks or the Internet (Static IP
Setup)
If you are connected to the Internet using a static IP address, anyone who wants to call
you just needs your username and the hostname or IP address of your workstation to
create a valid SIP URL, as described in
Section "Calling in the Same Network"
(page 156). If you or the calling party are located behind a firewall that filters incoming
and outgoing traffic, open the SIP port (5060) and the RTP port (7078) on the firewall
machine to enable Linphone traffic across the firewall.
Calling across Networks or the Internet (Dynamic IP
Setup)
If your IP setup is not static—if you dynamically get a new IP address every time you
connect to the Internet—it is impossible for any caller to create a valid SIP URL based
on your username and an IP address. In these cases, either use the services offered by
a SIP provider or use a DynDNS setup to make sure that an external caller gets connected
to the right host machine. More information about DynDNS can be found at
http://
en.wikipedia.org/wiki/Dynamic_DNS.
Calling across Networks and Firewalls
Machines hidden behind a firewall do not reveal their IP address over the Internet. Thus,
they cannot be reached directly from anyone trying to call a user working at such a
machine. Linphone supports calling across network borders and firewalls by using a
SIP proxy or relaying the calls to a SIP provider. Refer to
Section 8.1.5, "Configuring
the SIP Options"
(page 158) for a detailed description of the necessary adjustments for
using an external SIP server.
8.1.3 Configuring the Network Parameters
Most of the settings contained in the Network tab do not need any further adjustments.
You should be able to make your first call without changing them.
Using Voice over IP
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