SIP Domain Overview
Domains are also known as “Realms” within SIP networks.
A domain, or a SIP realm, is a component within SIP which is used to authenticate users within the SIP registration process.
Domain profiles are used to define the way users will authenticate with the SBC.
- Local authentication is used when users will register with the SBC.
- Upper registration is used when users will register to a softswitch or a IP-PBX through a SBC.
This enables topology hiding so that no one outside of the corporate network knows about the equipment sitting behind the SBC.
SIP Domain Configuration
Add a SIP domain by going to “Configuration -> Signaling -> Domains”
All you need to provide to add a domain is the domain name, which should be a FQDN string (ie mycompany.com).
The system will then prompt you to select whether you want to enable “Forward Registration / Authentication”. If you want NSC to handle authentication of SIP requests (ie REGISTER, INVITE) using the local user database, you must choose “Disable”. If you plan to forward authentication to a third-party server (ie a registrar server or PBX) you must select “Enable” and provide the information of the third-party server that will handle authentication of those SIP requests.
If you wish to create SIP accounts (users) you can click the “Add” button in the domain edit page.
- You can create as many domains as you want.
- Later you can “Bind” a domain to one or more SIP profiles.
- See the SIP profile configuration for details.
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