Service Record (SRV)

A Service Record (SRV) is a specialized DNS entry used to identify the hostname and port number for specific services, such as VoIP, SIP, or XMPP. It allows services to run on non-standard ports while remaining discoverable.

Unlike standard A records that only point to an IP, the SRV record provides a structured way to direct traffic to a specific service and port. This is essential for modern cloud environments where multiple services might reside on the same IP but different ports. It includes parameters for Priority (which server to try first) and Weight (how to distribute load between servers of the same priority).

Frequently Asked Questions

The format is: _service._proto.name. TTL class SRV priority weight port target. For example, a Minecraft server might look like: _minecraft._tcp.example.com. 3600 IN SRV 0 5 25565 mc.example.com.

No. Standard web browsers do not look for SRV records when you type a URL. They rely on A, AAAA, or CNAME records. SRV is reserved for specific protocols designed to utilize it, like Microsoft 365 discovery or gaming servers.

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