Ports & IPs

Please refer to the following document when configuring your firewall:

https://help.webex.com/en-us/WBX000028782/Network-Requirements-for-Webex-Teams-Services

Please also release the following ports (TCP & UDP):

IP

SIP Port

RTP Ports

85.119.56.149

8933, 8934

19560 - 27559

85.119.56.150

8933, 8934

19560 - 27559

85.119.56.151

8933, 8934

19560 - 27559

85.119.57.149

8933, 8934

19560 - 27559

85.119.57.150

8933, 8934

19560 - 27559

85.119.57.151

8933, 8934

19560 - 27559

Turn off SIP ALG

A SIP-ALG (Application Layer Gateway) is a component found in many routers or firewall systems. It was originally designed to support VoIP telephony. To do this, each SIP packet is analysed and modified in a way that the router thinks will help the end devices and systems involved. Unfortunately, this only works to a very limited extent in most routers. In most cases, the SIP ALG affects the telephony.

You should therefore - if possible - turn off this feature. The way of doing this varies from router to router.

Vodafone GigaCube

  • Security → SIP ALG Settings

Netgear WNR200v4

  • Advanced → Configure → WAN Configuration → Check "Disable SIP ALG"

  • If this point is not available, check if the firmware of your router is updated

Cisco RV042/RV082

  • You can find here the setting on a hidden page at http:///f_general_hidden.htm

TP Link Archer VR200v

  • Advanced → NAT → Uncheck "Enable SIP ALG"

Huawei LTE Router

  • Security → SIP ALG Settings

These tips are provided without guarantee and shall serve as support. We do not offer any further support.

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