---
title: Reference
description: Reference information for Cloudflare WAN.
image: https://developers.cloudflare.com/zt-preview.png
---

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

[Skip to content](#%5Ftop) 

# Reference

* [ Anti-replay protection ](https://developers.cloudflare.com/cloudflare-wan/reference/anti-replay-protection/)
* [ Bandwidth measurement ](https://developers.cloudflare.com/cloudflare-wan/reference/bandwidth-measurement/)
* [ Device compatibility ](https://developers.cloudflare.com/cloudflare-wan/reference/device-compatibility/)
* [ GRE and IPsec tunnels ](https://developers.cloudflare.com/cloudflare-wan/reference/gre-ipsec-tunnels/)
* [ Maximum transmission unit and maximum segment size ](https://developers.cloudflare.com/cloudflare-wan/reference/mtu-mss/)
* [ Traffic steering ](https://developers.cloudflare.com/cloudflare-wan/reference/traffic-steering/)
* [ Tunnel health checks ](https://developers.cloudflare.com/cloudflare-wan/reference/tunnel-health-checks/)
* [ Virtual networks ](https://developers.cloudflare.com/cloudflare-wan/reference/virtual-networks/)
* [ How Cloudflare calculates tunnel health alerts ](https://developers.cloudflare.com/cloudflare-wan/reference/how-cloudflare-calculates-tunnel-health-alerts/)

```json
{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/directory/","name":"Directory"}},{"@type":"ListItem","position":2,"item":{"@id":"/cloudflare-wan/","name":"Cloudflare WAN"}},{"@type":"ListItem","position":3,"item":{"@id":"/cloudflare-wan/reference/","name":"Reference"}}]}
```