Available in all subroutines.

Returns true if the address family of the given address is IPv4.


if (addr.is_ipv4(client.ip)) {
/* the client connected over IPv4 */

Try it out

addr.is_ipv4 is used in the following solution recipes, which show real world use cases. Click RUN to provision a Fastly service, execute the code on Fastly, and see how the function behaves.

Log the IP version (IPv4/IPv6)

Identify which type of IP address was used by the client connecting to your Fastly service.

User contributed notes

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