Getting Started Nur für den internen Gebrauch
A31003-S2000-R102-16-7620 02/2016
10 Provisioning Service, Developer’s Guide
c01.fm
Basic Network Infrastructure
1.3.2 Firewall and NAT
If the phones and the provisioning service reside in different networks or subnets, which are
separated by a firewall and/or NAT, it may be impossible for the provisioning service to establish
a connection with the phones. In this case, provisioning service driven interactions may not be
possible (for details about provisioning service driven interactions, please refer to Section
1.4.4.2, "Contact-me Messages" and Section 3.1.2, "Provisioning Service Driven Interaction").
To enable a solution for this problem, the phone can be configured to periodically poll the pro-
visioning service, or a special proxy, for new messages. Thus, provisioning service driven in-
teractions are possible even when the provisioning service is located behind a firewall, or in a
DMZ. For further information, please refer to Section 1.4.4.3, "Polling Request To Bridge A Fire-
wall" and Section 3.1.2.2, "Provisioning Service Located Behind A Firewall".
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