The connection time-out mechanism implemented in VMware Smart Assurance Service Assurance Manager makes use of a standard TCP feature known as “urgent data” or “out of band data.”

The HTTP proxy used with this code must pass the “out of band data” as is.

The RFCs that define the correct operation of HTTP proxies require that the proxies provide a transparent network connection. However, they do not explicitly mention support of out of band data.

Because of the large number of HTTP proxy implementations in use, VMware, Inc. is not in a position to indicate which, if any, fail to correctly pass out of band data.

Please check if the proxy server you are considering passes out of band data. Contact VMware Smart Assurance Global Services if the proxy server does not pass TCP urgent data.