Use of Forward Proxies in Your System
We do not recommend the use of intervening networking elements such as forward proxies between the client software (running on user desktops) and back-end system servers. We recommend you minimize such elements, because each intervening network element can introduce network latencies. Latency results in a poor user experience for aspects of Cisco Webex meetings, including Webex Video, Voice Connection using computer, and screen sharing. Intervening elements can also affect the contents of each networking packet in unpredictable ways that could break these features.
If your end users experience these issues, remove the intervening networking elements from your system. Check to see whether the problems are resolved.
Note |
Using forward proxies can interfere with quality-of-service (QoS) features. |
Performance Considerations
Proxies should not change the network traffic or add latencies into the overall flow of data in the system.
The forwarding proxy should have less than 10 ms latency for processing packets. Forwarding proxies that check the packet content may not be able to process packets in under 10 ms. Latency affects the audio, video, and data-sharing quality of the meeting experience for users. It may also affect the throughput between clients and servers, because of the longer round trip time (RTT).
Functionality
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If caching mechanisms (such as cookie caching) are used in the forward proxy, then that may break the functionality of your system. In this situation, we suggest you disable caching, although this may impact the performance of the forwarding proxy.
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User-level authentication should be turned off at forward proxies.
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If the connection between the forward proxy and the Cisco Webex Meetings Server system can bypass the Internet Reverse Proxy (for "internal" users). In this scenario, the forward proxy must allow the system to redirect HTTPS connections between the virtual machines, each of which has its own HTTPS URL. This redirection is not visible to the forward proxy if the Cisco Webex Meetings Server Internet Reverse Proxy is between the proxy and the internal virtual machines.
Supported Proxies
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HTTP
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SOCKS v4
Note
SOCKS v5 is not supported