Medias Mediatrix 1204, Reference Manual

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Outbound Proxy Server Reference Manual (SIP Version)
Mediatrix 1204 139
Outbound Proxy Server
An outbound proxy is an intermediary entity that acts as both a server and a client for the purpose of making
requests on behalf of other clients. The outbound proxy receives all outbound traffic and forwards it. Incoming
traffic may or may not go through the outbound proxy. The outbound proxy’s address is never used in the SIP
packets, it is only used as a physical network destination for the packets.
When the outbound proxy is enabled, the proxy is still used to create the To and the From headers, but the
packets are physically sent to the outbound proxy.
The outbound proxy is enabled if the IP address is valid (i.e., not 0.0.0.0). The default static value in the MIB
is 0.0.0.0.
Configuration Source
The Mediatrix 1204 must know the IP address and port number of the outbound proxy. You can assign these
information to the Mediatrix 1204 through a DHCP server or manually enter them yourself with the static
variables.
DHCP Configuration
Using the DHCP configuration assumes that you have properly set your DHCP server with the relevant
information. See
“Chapter 8 - IP Address and Network Configuration” on page 117 for more details.
X
To use DHCP-assigned information:
1. In the ipAddressConfig folder, locate the sipServerSelectConfigSource variable (under the
ipAddressConfigSipServer group).
This variable defines whether or not the Mediatrix 1204 must ask for its outbound proxy settings
through a DHCP server.
2. Set the sipServerSelectConfigSource variable to dhcp .
You can query the outbound proxy’s IP address and port number assigned by the DHCP server in
the following read-only variables (under the
ipAddressStatusSipServer group of the
ipAddressStatus folder):
• sipOutboundProxyHost
• sipOutboundProxyPort
SIP Outbound Proxy (From RFC 3261)
A proxy that receives requests from a client, even though it may not be the server resolved by the
Request-URI. Typically, a user agent is manually configured with an outbound proxy, or can learn about
one through auto-configuration protocols.
When enabled, the initial route for all SIP requests containa the outbound proxy address, suffixed with
the loose routing parameter “lr”. The Request-URI still contains the home domain proxy address.
Requests are directed to the first route (the outbound proxy).
Note:
When defining whether or not the Mediatrix 1204 must get its SIP server configuration through a
DHCP server, this is set for all the SIP servers. You cannot define a different configuration for each type of
server.