Yesterday I published this post about an issue that caused TMG stop to respond and I want to clarify one key point here: TMG didn’t stop because was not able to handle the load , let’s be clear on that. Maybe it was not clear for some readers that don’t know about how TMG works, but the issue here was...

Introduction Recently I was engaged on this TechNet Forum thread and I thought that it was an interesting question and concern. Let me explain the scenario on which I was able to repro the behavior on my own lab: Contoso has a security policy where only users that belong to the Internet Users...

Introduction This post is about an interesting issue where a third party application that was configured as service was failing to establish a connection with the destination server because ISA Server was denying the traffic. For this brief description it really sounds like a trivial issue where...

Couple of days ago I was assisting a friend to troubleshoot the infamous 5783 that was causing the authentication prompt issue that we all know about. In this case the problem was happening throughout the night, which was even odder because during the day when the traffic was really high the issue wasn...

1. Introduction When we think that we had covered all scenarios to mitigate possible issues with change password feature through ISA Server 2006 something new happen. This quick post is about a scenario where only users that belong to a specific OU were unable to change password through ISA Server...

Last week I was working on a very interesting case where only one specific user was having a problem browsing Internet through ISA Server 2006. When this specific user was trying to access Internet he receives a page with a time out error message and Firewall client turns red immediately. Interesting...

1. Introduction Consider a scenario where external client is trying to authenticate in an OWA publishing rule through ISA Server 2006 using Forms Base Authentication. In this scenario ISA Server 2006 was in workgroup and the FBA was using LDAPS authentication method. Problem: authentication doesn...

1. Introduction This post is about a scenario where users were not able to authenticate on a FBA page published by ISA Server using LDAP as authentication repository. The error message that was showing up there was: Figure 1 – Unable to authenticate. Although it says to double check...

We just published a new article at Tales from the Edge Community Site that describes how to troubleshooting LDAPs authentication through ISA Server 2006. Check it out at: http://technet.microsoft.com/en-us/library/dd316279.aspx

1. Introduction This post is about an interesting case where customer was publishing a web site through ISA Server 2006 and he wants to receive an authentication prompt when users access the web site rather than show the Forms Base Authentication page. No problem on that, but the issue was that...