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Old 07-01-2008, 11:29 PM   #1 (permalink)
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Default Weird Blackberry Browser and ISA 2006 Issue

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We have been running BES and blackberry devices at my Department for over 3 years without too many issues. We have always ben able to browse both our intranet and the internet via our ISA 2000 server. We currently have 8700 and 8800 devices and BES 4.1.4.26

Since upgrading to ISA 2006 we found that even though we authenticate with ISA we were repeatedly ask to reauthenticate as we browse within and between sites. I have tracked this authentiction request down to the downloading of images.

Findings;

1. If I turn "Show Images" off on the blackberry I can browse (after my first authentication) to my hearts content.

2. If I turn on show images, I get one our two images then get prompted for authentication for each subsequent image.

3. As part of my investigation, I changed "support HTTP authentication" to false. I was then able to browse after the first authentication without constantly being prompted. However, only the first few images downloaded. The rest were simply links (I suspect these would have been the ones prompting me for authentication if HTTP support was true) . I can highlight the image links and request the image and they download fine. The other downside of removing "support HTTP authentication" is then I can't authenticate with my intranet.

I hoping someone has seen this behaviour as it is driving me up the %^$# wall.

Cheer

Deane




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Old 07-01-2008, 11:36 PM   #2 (permalink)
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If you go to the properties of the MDS Connection Service and select HTTP ... then set Support HTTP Authentication TRUE and make sure the Authentication Timeout is set reasonably ... does that help?
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Old 07-01-2008, 11:39 PM   #3 (permalink)
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Thanks hdawg. I've already tried that. I've maxxed the timeout out.
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Old 07-02-2008, 12:29 AM   #4 (permalink)
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... I haven't used ISA 2006 much at all, but if you set a specific rule for the BES to allow everything / anything outbound and have that rule high up on the processing list, might that allow you to escape a potential issue?
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Old 07-02-2008, 12:45 AM   #5 (permalink)
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Yep, your correct. I implemented such a rule as part of my diagnosis. However, we have a strict security requirement that all internet access is logged and this includes via Blackberrys. By setting that pass through rule, the user is not prompted for authentication and therefore not logged. My ISA logs have confirmed that the issue is indeed with images. For some reason ISA sees the access request to them as anonymous.

Thanks for your thought.
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