I found out that the cause is a webcontent filter (DansGuardian) behind the proxy.

When we avoid this than the connection is working.

Has anybody experienced with something like this ?

Hello Ashad,

When you state that it is a webcontent filter, do you have the ability to place the file and / or website within the safe list of the webcontent filter? This way it will pass the content correctly to the intended end user client.

Please let me know.

Thanks,

Robert Castruita