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Archive for the ‘Forefront TMG’ Category

TCP Checksum errors in Forefront TMG or ISA Server in XenServer Environment

June 19th, 2009 No comments

Hi,

When I first tried to install Forefront TMG on a test XenServer, there was no way to get any network traffic flowing.
By looking at the logs I could see that the rules where fine, but that every packet was dropped because a wrong TCP Checksum.

To solve this I had to disable the generation of TCP Checksums on each virtual network interface.

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File Server publishing through OWA

March 27th, 2009 No comments

Hi,

I’m here with a new problem that I solved a while ago, but I do think lots of people will benefit from this.
Outlook Web Access 2007 has a new feature “Documents”. It can be used to access your documents through owa from anywhere.

The problem is, that even when you configure everything, it still doesn’t work. You can only access the local exchange server, but no other computer or server. Because you always get the following error:

authentication-failure

Authentication Failure:
Outlook Web Access was unable to retrieve the requested SharePoint document or folder. This may have occured because of the way your Microsoft Exchange and Microsoft SharePoint servers are configured. You can try going directly to the resource by copying the link you typed and pasting it into Internet Explorer. For more information, contact technical support for your organization.

The error states an error with a SharePoint document, but we do want to access a File Share.

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Forefront TMG is not configured to allow SSL requests from this port.

February 27th, 2009 2 comments

If you ever get this error when trying to visit an SSL site on a non-standard port, you will have to use a script to change the allowed SSL Ports.

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Categories: Forefront TMG Tags: ,