Deny User Access to Application if User is on IPV6

Last Updated: Feb 20, 2026

Overview

This article will address how to disable/ filter IPV6 from IPV4. By default it is not possible to disable only with a custom Action.

Applies To

Custom Action
IPV6

Solution

A custom Action can be used to filter or disable IPV6. The code snippet below disables access with an IPV6:

const ipChecker = require('ip')

exports.onExecutePostLogin = async (event, api) => {

const ip = event.request.ip;

ipChecker.isV4Format(ip) ? console.log('V4')

: api.access.deny(`Access to ${event.user.name} not allowed`)

//Custom logic

};