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

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IP addresses

  • 140.235.248.0/24
  • 35.196.54.85
  • 35.222.110.103
  • 34.174.6.120
  • 34.94.212.85
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.

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DNS

  • connect.voxo.co
  • portal.voxo.co
  • app.voxo.co
  • api.voxo.co
  • rps.yealink.com

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Ports

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

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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