Weird Error

Hi Experts,

Please see the screen shot below, this is the error we get, when we try to access the website from the network.
E,g, works fine works fine gives this error

next day works fine gives this error works fine

however off the network
Off the network it works completely fine.

Contacted the vendor, they have suggested that they do not have any issues with their websites.

I am wondering if this is to do with network filtering?

Browser in USE is IE.
Usman FaridService Desk AnalystAsked:
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ste5anSenior DeveloperCommented:
This normally indicates that you're sitting behind a HTTP proxy or an deep packet inspection firewall.

btw, are you trying to connect via https? Then I guess it is a kind of security box. Cause the image looks like encrypted data.

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Julian HansenCommented:
That is not an error that is a binary file that is being returned.

What were you expecting to get?
Usman FaridService Desk AnalystAuthor Commented:
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