Dear, we have a TMG installed and we want improve the availability, thus, we have configured the ISP redundancy. However, after this configuration all our Web Publishing Rules are not working correctly. Some internal website published beyond the TMG definitely not work, others are not available externally from both the ISP links (only from the first/main ISP link). Initially I did think after configuration of the ISP redundancy both the ISP links would be handled as the "External" network and all income rules would work transparently, independently from ISP link. This does not seem to be the case.

Please, are there some approach that we can use to configure the ISP redundancy preserving my incoming rules working? What problems I must expect in my incoming rules after enable the ISP redundancy?

Hi,

You need to check TMG logs to find more information.

Please make sure you have configured the ISP Redundancy correctly.

Exploring ISP Redundancy in Forefront Threat Management Gateway (TMG) 2010

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Best Regards,