---
title: "How to block an IP version for data traffic?"
slug: "how-to-block-an-ip-version-for-data-traffic"
updated: 2026-05-27T12:22:09Z
published: 2026-05-27T12:22:09Z
canonical: "docs.insys-icom.com/how-to-block-an-ip-version-for-data-traffic"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.insys-icom.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How to block an IP version for data traffic?

It can be useful due to reasons of security to block an IP version (IPv4 or IPv6) for data traffic completely. Proceed as follows for this:

- Activate the [IP filters](https://docs.insys-icom.com/kb/docs/netfilters-en) (firewall) of the IP version to be blocked ( *Network* → *Interfaces →* *Firewall / NAT*)
- Modify all IP filter rules such that they only permit the desired *IP version*