Network requirements

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

Specific requirements differ between Cisco WebEx versions 6.x and 5.x. This topic lists requirements for each version separately.

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

Network Access requirements for Cisco WebEx version after 6.x

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 clients such as Adium, you need to open port 5222 as well. For more information about using third-party XMPP clients, see Supporting third party XMPP IM Clients.

WebEx services are offered over the following IP ranges:

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 because 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 Cisco WebEx, 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

Network Access requirements for Cisco WebEx version 5.x

You need to open connectivity over ports 80 and 443 in the manner described below for the following domains:

webex.com, webexconnect.com, and all the sub-domains of webex.com and webexconnect.com require both ports 80 and 443 to be open.
slogin.oscar.aol.com requires only port 443 to be open.
https://aimpro.premiumservices.aol.com/cc/ClientConfigurationWS.jws requires ports 80 and 443 to be open
components.premiumservices.aol.com requires ports 80 and 443 to be open optional
aimpro.premiumservices.aol.com requires ports 80 and 443 to be open optional
radaol-prod-web-rr.streamops.aol.com requires ports 80 and 443 to be open optional

WebEx services are offered over the following IP ranges:

66.163.32.0 – 66.163.63.255
209.197.192.0 - 209.197.223.255

In addition to the WebEx IP ranges, you also need the following IP ranges from AOL to be opened up:

205.188.0.0 – 205.188.255.255
64.12.0.0 – 64.12.255.255

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

To receive automatic Username and Passwords, set your SPAM Filter to allow emails from mda.webex.com.

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 Client.

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. For additional information, see the following note.

Note:

Typically, when a Cisco WebEx user starts an audio or video call, the Cisco WebEx client first attempts to establish a direct connection to another user's Cisco WebEx client. 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 client will establish a connection to a Cisco WebEx server for audio and video communication. The Cisco WebEx client 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 client 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.

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