---
description: Traffic types inspected by the Network Firewall.
title: Traffic types
image: https://developers.cloudflare.com/og-docs.png
---

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# Traffic types

Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/cloudflare-network-firewall/about/traffic-types/index.md)|[Agent setup](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/agent-setup/)

Cloudflare Network Firewall (formerly Magic Firewall) enables you to allow or block traffic on a variety of packet characteristics, such as source and destination IP, source and destination port, protocol, packet length, and bit field match.

Cloudflare Network Firewall supports layers three and four — network and transport — protocols such as TCP, UDP, and ICMP. Any type of layer three or four protocols can go through Cloudflare Network Firewall and then be matched on those protocols.

To view the list of available fields, refer to [Cloudflare Network Firewall fields](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/cloudflare-network-firewall/reference/network-firewall-fields/).

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