DNS
Domain Name System, more commonly known as DNS, is a hierarchical decentralized naming system connected to the Internet or a private network. It translates domain names to the numerical IP addresses needed for locating and identifying services and devices on the network.
TelcoBridges and DNS
Toolpack provides support for DNS and FQDN (fully qualified domain name) for SIP calls. FQDN might be used in the signaling or in the media component of a call.
How DNS is configured differs between each product line.
FreeSBC
Based upon your system requirements, you can configure one or several DNS groups. Each group having one or several DNS servers sorted by priority.
A conceptual illustration is provided below:
Tmedia
A conceptual illustration is provided below:
TelcoBridges' DNS Implementation
TelcoBridges' DNS implementation works beside the SIP stack.
Supported DNS RFCs
TelcoBridges supports the following RFCs for DNS:
| Specification | TMedia SIP stack support | Toolpack API Support | Media Gateway Application Support |
|---|---|---|---|
| RFC 1035 Domain Names | Yes | Complete | Complete |
| RFC 2782 DNS SRV Record | Yes | Complete | Complete |
| RFC 2915 NAPTR DNS Record | Yes | Complete | Complete |
[1] For more information please contact customer support.
Configuration
| FreeSBC | Tmedia/Tsig/Tdev |
|---|---|