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[CF1] firewall IPs clarification #23643

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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,13 @@ The WARP client connects to Cloudflare via a standard HTTPS connection outside t

<Render file="warp/client-orchestration-ips" />

<Render
file="warp/firewall"
params={{
domain: "zero-trust-client.cloudflareclient.com",
}}
/>

## DoH IP

:::note
Expand All @@ -26,6 +33,13 @@ In [Gateway with DoH](/cloudflare-one/connections/connect-devices/warp/configure
- IPv4 DoH Addresses: `162.159.36.1` and `162.159.46.1`
- IPv6 DoH Addresses: `2606:4700:4700::1111` and `2606:4700:4700::1001`

<Render
file="warp/firewall"
params={{
domain: "<ACCOUNT_ID>.cloudflare-gateway.com",
}}
/>

### Android devices

If you are deploying the Cloudflare One Agent on Android/ChromeOS, you must also add `cloudflare-dns.com` to your firewall exception list. On Android/ChromeOS devices, WARP uses `cloudflare-dns.com` to resolve domains on your [Split Tunnel list](/cloudflare-one/connections/connect-devices/warp/configure-warp/route-traffic/split-tunnels/#domain-based-split-tunnels).
Expand Down Expand Up @@ -89,6 +103,13 @@ The client connects to the following destinations to verify general Internet con
- `162.159.197.3`
- `2606:4700:102::3`

<Render
file="warp/firewall"
params={{
domain: "engage.cloudflareclient.com",
}}
/>

### Inside tunnel

The WARP client connects to the following IPs to verify connectivity inside of the WARP tunnel:
Expand All @@ -98,7 +119,12 @@ The WARP client connects to the following IPs to verify connectivity inside of t

Because this check happens inside of the tunnel, you do not need to add these IPs to your firewall allowlist. However, since the requests go through Gateway, ensure that they are not blocked by a Gateway HTTP or Network policy.

Thought it may be visible in `warp-diag` and other logs, `connectivity.cloudflareclient.com` is used internally by WARP and should not be used in firewall policies.
<Render
file="warp/firewall"
params={{
domain: "connectivity.cloudflareclient.com",
}}
/>

## NEL reporting (optional)

Expand All @@ -120,7 +146,6 @@ If your organization does not currently allow inbound/outbound communication ove

- Windows: `C:\Program Files\Cloudflare\Cloudflare WARP\warp-svc.exe`
- macOS: You must explicitly allow both the core networking daemon and GUI component as shown in the following instructions.

1. Core networking daemon: `/Applications/Cloudflare WARP.app/Contents/Resources/CloudflareWARP`

This binary does not have a Bundle ID and must be allowed via full path.
Expand Down
6 changes: 6 additions & 0 deletions src/content/partials/cloudflare-one/warp/firewall.mdx
Original file line number Diff line number Diff line change
@@ -0,0 +1,6 @@
---
params:
- domain
---

If your firewall allows traffic only by domain, you may need to explicitly allow <code>{props.domain}</code>. Even though <code>{props.domain}</code> may resolve to different IP addresses, WARP overrides the resolved IPs with the IPs listed above. To avoid connectivity issues, ensure that the above IPs are permitted through your firewall.
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