История страницы

Interaction scheme

Connection steps:

• A user selects call back authorization when connecting to the Captive Portal and enters a phone number;
• Eltex-portal sends information on a Called number to the service eltex-ngw via Websocket;
• Eltex-ngw transfers information on a Called number to an SMG gateway via a CoA request;
• SMG gateway makes a call from a number keeped in a number pool and sends this number (Calling number) to a user in CoA-ACK;
• After a user takes a call (which is dropped then), rejects or ignores it, the SMG gateway will send an ACC-STOP RADIUS packet with confirmation of call receipt to the NGW service;
• A user enters last four digits of the Calling number;
• Authorization has been successfully completed.

...

Description

...

To authorize on the portal, a user should connect to SSID with portal authorization, enter the telephone number and click "Confirm with incoming call". After that, a message "Enter the last 4 digits of the Calling number" will be displayed, and the number will be called.

...

An interaction scheme is available on Interaction scheme for call back authorization

Configuring call back authorization

...

To confirm a user account using a call back, configure eltex-ngw and select "Call to user" as a confirmation method in the portal common settings.
1) eltex-ngw settings for interaction with SMG gateways can be found on Configuring incoming call authorization
2) Open the Portal Constructor, select a portal on which a confirmation method "Call to user" is selected and go to Common settings. In the section "Confirmation methods" place a check in the checkbox "Call to user". After selecting the checkbox, the field "Call waiting timeout" will be available. A default timeout is 30 seconds.
"Call waiting timeout" is a time period on exceeding of which an input field on the page where the last four digits of a calling number should be entered will become unavailable, and a message "Unable to make a call. Please, try again." will be displayed if the acct-stop RADIUS packet from the SMG gateway is not received by Eltex-NGW.

Troubleshooting

...

1)
 "Request execution error" occurs after clicking the button "Confirm with incoming call". Check network connection"

...

2019-03-14 10:03:06.006 ERROR  SmgGate$Receiver:161 - Incorrect authenticator for incoming radius packet
2019-03-14 10:03:06.006 DEBUG  SmgGate$Receiver:179 - Packet received
2019-03-14 10:03:06.006 ERROR  SmgGate$Receiver:161 - Incorrect authenticator for incoming radius packet
2019-03-14 10:03:07.007 DEBUG  SmgGate$Receiver:179 - Packet received
2019-03-14 10:03:07.007 ERROR  SmgGate$Receiver:161 - Incorrect authenticator for incoming radius packet

Identification scenario

SMG configuration

Input data
SMG gateway is configured to interact with PSTN (interfaces for PSTN connection and a dial plan are set) and can make calls. The gateway is configured according to its operation manual.
Requirements to data transmission network configuration
SMG accepts RADIUS Change-of-Authorization (CoA) requests via UDP port 3799. The network should provide passing of Eltex NGW requests to a specified SMG port.
SMG sends RADIUS Accounting requests to UDP port1813. The network should provide passing of SMG requests to a specified Eltex NGW port.
Description of the work
The procedure is initiated via RADIUS Change-of-Authorization (CoA) request (described in RFC 5176). Is used for call back authorization of connection to public networks. A user connects to a network and gets to a WEB portal where an access password is requested and then a user is suggested to enter a password for authorization. After entering a phone number, a user receives a call to this number. A calling number or its part displayed on the user's phone serves as an access password to a public network and should be entered on the WEB portal. To initiate a call, the WEB portal should send a CoA-Request packet with the attribute Called-Station-Id containing user phone number to SMG via RADIUS protocol. CoA-Request example:

...