PortaBilling uses the RADIUS protocol as per Remote Authentication Dial-In User Service (RADIUS), RFC 2865 and RADIUS Accounting, RFC 2866. By default, the PortaBilling RADIUS server listens on port 1812 (UDP) for authentication requests and on port 1813 (UDP) for accounting requests.
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PortaBilling uses a set of Cisco RADIUS VSAs (Vendor-Specific Attributes). For more information, please refer to the RADIUS Vendor-Specific Attributes Voice Implementation Guide at Cisco website.
The time on the network access server (NAS) must be synchronized with the PortaBilling server (the Event-Timestamp attribute sent in accounting and authentication RADIUS requests must correspond to the actual time on the NAS).
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