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Network requirements

The following network requirements are required to access the Cisco WebEx Messenger service. The application computer must have Internet connectivity and be able to connect to the following hosts and ports.

 

Note: Cisco WebEx Connect application uses the Web Proxy information configured in Internet Explorer to access the application configuration service. If the proxy in the customer network is an authenticated proxy, the proxy is appropriately configured to allow access to this URL without requiring any authentication.

Network access requirements:

You need to open connectivity over ports 80 and 443 for the following domains:

  • webex.com
  • webexconnect.com
  • all the sub-domains of webex.com and webexconnect.com.

If you intend to use third-party XMPP applications such as http://adium.im, you need to open port 5222 as well. For more information about using third-party XMPP applications, see Supporting third party XMPP IM Applications.

WebEx services are offered over the following IP ranges:

  • 64.68.115.0 - 64.68.115.255
  • 66.163.32.0 – 66.163.63.255
  • 209.197.192.0 - 209.197.223.255
  • 173.243.12.0 - 173.243.12.255 (Subnet)

It is generally not recommended to restrict access based on IP ranges as WebEx may acquire new IP addresses or reassign IP addresses.

To receive notifications from Cisco WebEx, set your SPAM Filter to allow emails from mda.webex.com. Notifications typically include important information about new Cisco WebEx accounts, password resets and similar information, communicated to users through emails.

In order for Cisco WebEx High Availability to function correctly for the Cisco WebEx Connect application, add the following URL to your firewall whitelist:

  • http://msdl.microsoft.com/download/symbols/index2.txt
  • http://msdl.microsoft.com/download/symbols/wininet.pdb/9241CE8FD46D4D28B0C1AAA596FD93222/wininet.pdb

Port and bandwidth requirements for audio-video sessions

This section lists the recommended port and bandwidth requirements for the Video sessions initiated from the Cisco WebEx Connect application.

Video is provided over random ports that include both TCP and UDP. In general, audio and video functionality is offered over the following ports:

 

Item

Port Type

Port Number

A/V Server port

TCP

80 and 443

 

UDP

5101

STUN server

TCP

80

 

UDP

8070/8090

P2P port

TCP

Random

 

UDP

Random

The UDP port 5101 is used to establish the server connection. If the connectivity fails, ports 80/443 are used to establish connectivity.

 

Note:

Typically, when a Cisco WebEx Connect user starts an audio or video call, the Cisco WebEx Connect application first attempts to establish a direct connection to another user's Cisco WebEx Connect application. Direct connections are possible if the other user is on the same network and is not separated by a firewall. If a direct connection is established, then the P2P ports listed in the table are used for audio and video communication.

If a direct connection cannot be established (due to a firewall or other network device), the Cisco WebEx Connect application will establish a connection to a Cisco WebEx Messenger service for audio and video communication. The Cisco WebEx Connect application will first attempt to connect to the server using a UDP port. If the port connection cannot be established (due to firewall restrictions), the Cisco WebEx Connect application will then establish a server connection using the TCP ports listed in the table.

Bandwidth Requirement for video

 

Resolution

P2P Bandwidth

Remarks

90p

0~120kbps

Additional bandwidth may be consumed if severe packet loss is detected. This will compensate for lost packets.

180p

120~360kbps

Additional bandwidth may be consumed if severe packet loss is detected in order to compensate for lost packets.

360p

360~1200kbps

Actual resolutions include 360p, 432p, and 512p. Additional bandwidth may be consumed if severe packet loss is detected. This will compensate for lost packets.

720p

1200kbps~2000kbps

Actual resolutions include 576p and 720p. Additional bandwidth may be consumed if severe packet loss is detected. This will compensate for lost packets.

 

Note: The bandwidth matrix is intended as a guideline. Additional bandwidth might be required depending on your usage. In general, it is recommended to have a minimum bandwidth of at least 50 Kbps for using the IM, video, VoIP and desktop sharing capabilities of Cisco WebEx Connect application.

If the video call goes through the audio/video server, the maximum resolution supported is VGA (360p).

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