Sonicwall Filtering Issue

[Number6]

Our Sonicwall PRO 2040 appears to be blocking streaming video content. I say appears only because I've eliminated all other possibilities so as Mr Holmes would say - once you have eliminated every other possibility then whatever remains, no matter how improbable, must be the reason.

 

We can't get any streaming video content to display on any workstation. The streams in question are rendered by Flash Player. The hosting site itself will load (e.g. howstuffworks.com) but when a video is selcted the spinny thing that indicates that the content is being downloaded displays permanantly. The teacher who brought this to my attention tells me that the video she needs plays perfectly OK on her home PC.

 

I've updated everything, OS is fully patched and the latest Java and Flash Player is installed. Browser is IE7.

 

The questions I have are these:

 

1) If this is a firewall issue how can I unblock it. I have no idea what ports are required and hence can't set up a tunnel through the Sonicwall device. Any suggestions?

 

2) Is there something I've missed? Could it be something other than a firewall issue? If so what else could it be?

[DaveJ2717uk]

Does your sonicwall box have a content filer enabled - I found that the sonicwall content filter (sonicwall 4100) has an MP3/Streaming Filter enabled by default once removed all returned to normal again.

[Number6]

Hang on, I'll check.

[Number6]

No content filtering is enabled on the Sonicwall box.

[Number6]

It's sorted now.

 

Turns out it was an OpenDNS configuraton issue.