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

# Firewall IP Whitelist

> VOXO IP range, ports, and servers to allow on your firewall for real-time traffic.

Add the following VOXO IP range, ports, and servers to your firewall allowlist for real-time traffic.

### IP addresses

* `140.235.248.0/24`
* `35.196.54.85`
* `35.222.110.103`
* `34.174.6.120`
* `34.94.212.85`

<Warning>
  A missing `140.235.248.0/24` is the most common cause of one-way or no audio on managed networks, so make sure this subnet is whitelisted.
</Warning>

### DNS

* `connect.voxo.co`
* `portal.voxo.co`
* `app.voxo.co`
* `api.voxo.co`
* `rps.yealink.com`

### Ports

* `443 (TCP)`
* `5060 (TCP)`
* `8060 (TCP)`
* `5060 (UDP)`
* `8060 (UDP)`
* `10,000 - 60,000 (UDP)`

### STUN servers

* `stun.l.google.com:19302`
* `stun1.l.google.com:19302`
* `stun2.l.google.com:19302`
* `stun3.l.google.com:19302`
* `stun4.l.google.com:19302`