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Available inall subroutines.

Returns true if the address family of the given address is IPv6.

Example

if (addr.is_ipv4(client.ip)) {
  /* the client connected over IPv6 */
}

Try it out

addr.is_ipv6 is used in the following code examples. Examples apply VCL to real-world use cases and can be deployed as they are, or adapted for your own service. See the full list of code examples for more inspiration.

Click RUN on a sample below to provision a Fastly service, execute the code on Fastly, and see how the function behaves.