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Blog Post:
TMG stopped processing web proxy requests
Forefront TMG Team
This post is about an issue I worked on several days ago. Symptom: ======== My customer had a TMG array with two nodes running with NLB. The problem they faced was that from time to time some TMG node couldn't process traffic anymore: requests to the virtual IP (VIP) failed and only rebooting the TMG...
on
9 Apr 2013
Blog Post:
How to configure the TMG Service Account to avoid problem with logging on SQL Server
Forefront TMG Team
One of the features introduced with TMG Service Pack 2 is to run the Firewall Service with a Domain account, this allow users to authenticate with Kerberos when using NLB. Find more information about this feature here: http://technet.microsoft.com/en-us/library/hh454304.aspx However you should pay attention...
on
2 Apr 2013
Blog Post:
Access to remote FTP server through TMG 2010 may fail with error 550 (Access Denied)
Forefront TMG Team
Hi everybody! In this article we will see how to troubleshoot an issue with accessing an FTP server behind TMG 2010. Imagine we have the following situation: a client PC on an internal corporate network want to access a remote FTP server through TMG 2010 using an FTP client such as, for example...
on
5 Mar 2013
Blog Post:
How to implement PEAP-MSCHAPv2 as authentication method for VPN connections in TMG 2010
Forefront TMG Team
As you may know, there is a known security vulnerability for the authentication method MS-CHAPv2. The following TechNet article provides some detailed information about it: Microsoft Security Advisory (2743314) Unencapsulated MS-CHAP v2 Authentication Could Allow Information Disclosure http://technet...
on
10 Dec 2012
Blog Post:
TMG 2010 – Error “setup failed while registering Forefront TMG managed performance monitor” prompted while installing or repairing the TMG installation
Forefront TMG Team
It can happen while installing Forefront TMG 2010 or during a repair that we hit the following error: To this error is also normally linked to the ISA managed control service not starting correctly and errors as the following in the application event viewer: On the other hand it is also possible to hit...
on
5 Oct 2012
Blog Post:
TMG Logging to LLQ
Forefront TMG Team
One of the problems causing TMG to log to LLQ instead of the database is the presence of orphaned databases in the local SQL Server instance. In other words you may have some databases that are registered on the local SQL Server but the corresponding .mdf and .ldf files are missing from the disk. This...
on
18 Sep 2012
Blog Post:
TMG SP2 Rollup 2 available
Forefront TMG Team
We'd like to advise that Rollup 2 for TMG SP2 is now available. TMG SP2 Rollup 2 can be downloaded here: http://support.microsoft.com/kb/2689195 Please see KB for details of the fixes included in this rollup. The Build Number is: 7.0.9193.540 Thank you
on
8 May 2012
Blog Post:
TMG 2010 – FBA, troubleshooting the change password feature
Forefront TMG Team
When we are publishing OWA, or every web service through TMG and we are willing to make use of FBA we have the chance to change our password through the FBA web form. However this step is not always as straightforward as it seems and there are some possible pitfalls in the configuration on the TMG or...
on
7 May 2012
Blog Post:
URL Filtering and Blocked URL requests on the Dashboard
Forefront TMG Team
From time to time we come across the question why are the values of the Blocked URL requests at URL Filtering increasing on the dashboard, although the URL Filtering feature is disabled. In this post I would like to explain, what exactly we can see there. The first value represents the number of the...
on
2 May 2012
Blog Post:
Issue with TMG remote SQL logging
Forefront TMG Team
We recently received a case from a customer reporting that the TMG log data were not being properly stored in a remote SQL database but was accumulated in the Large Logging Queue (LLQ). The LLQ is an improvement added in TMG, particularly useful in scenarios where logging to a remote SQL Server is involved...
on
30 Apr 2012
Blog Post:
Blank User Activity Report if domain or username contains accented characters
Forefront TMG Team
Blank User Activity Report if domain or username contains accented characters Administrators creating a User Activity Report for users where the domain or user name contain characters that are not included in the english alphabet, may not be able to see any activity for these users. The report will be...
on
30 Jan 2012
Blog Post:
X-flash-version header can prevent ISA/TMG from compressing contents
Forefront TMG Team
In this blog post I want to discuss a solution, which we provided to one of our customers. The problem was linked to a published web site where specific flash content had not been compressed as expected by TMG/ISA. The first thing which is important to mention is, that it usually it not necessary...
on
30 Dec 2011
Blog Post:
New in SP2: Improved Error Pages
Ori Yosefi - MSFT
In TMG 2010 Service Pack 2, we put our focus on bug fixing, in order to improve the overall experience with TMG 2010. However next to pure bug fixing, we also introduced some new features. In this article we’ll provide a quick introduction to the new error pages and will provide a brief overview of how...
on
13 Oct 2011
Blog Post:
New in SP2: Site Activity Report
Ori Yosefi - MSFT
Have you ever been interested in which users visit specific sites on the Internet very often? E.g. which users did browse most on blogs.technet.com last week? In SP2 we added a new report, which allows analyzing the usage of specific sites connected to users in your organization, with a few mouse clicks...
on
12 Oct 2011
Blog Post:
New in SP2: Kerberos Authentication in Load Balanced Scenarios
Ori Yosefi - MSFT
In TMG 2010 Service Pack 2, we did put our focus on bug fixing, in order to improve the overall experience with TMG 2010. However next to pure bug fixing, we also introduced some new features. One of these new features introduces the possibility to allow Kerberos Authentication when connecting to TMG...
on
12 Oct 2011
Blog Post:
User Activity report for multiple users not working error 0xc0040432
Ori Yosefi - MSFT
The user activity report is a new feature of Forefront TMG SP1. I recently came across an issue where the customer was trying to run TMG user activity reports. When he used a single user (domainname\username) it rendered the report okay, but when we tried the same for 2 users (domainname\username1; domainname...
on
26 Mar 2011
Blog Post:
Using Forefront TMG 2010 to Secure Access to Your Cloud Services
Ori Yosefi - MSFT
If you read the article Economics of the Cloud published last November on Microsoft on the Issues blog , you will see the that Microsoft analysis “uncovers economies of scale for cloud that are much greater than commonly thought”. As more and more business start to move to the cloud there is also the...
on
22 Feb 2011
Blog Post:
CSS Forefront Edge Team is Hiring in US
Ori Yosefi - MSFT
The Microsoft TMG/UAG Server support team in US is looking to hire a Full Time Employee. If you’d be interested to come and work with us and learn more about TMG/UAG internals than you probably would anywhere else in the world ,then this might be the job for you. We’re looking for someone very experienced...
on
7 Feb 2011
Blog Post:
Windows Update fails for some workstations behind TMG when using WPAD
Ori Yosefi - MSFT
Introduction This post is about a recent scenario where TMG Administrator was receiving complains that some workstations that were using TMG as proxy were failing to run Windows Update. The interesting part of this issue was that only some workstations were having such problem and only if they were using...
on
30 Nov 2010
Blog Post:
“No network adapters could be identified” error when choosing a network template in TMG
Ori Yosefi - MSFT
Introduction Some of our customers have experienced the problem described below when doing the initial network configuration of a fresh TMG installation. I wanted to share here the cause and solution to this issue. Consider the following scenario You have installed Forefront TMG 2010, but when running...
on
19 Nov 2010
Blog Post:
Unable to join to TMG EMS Array with error: 0xC0040431
Ori Yosefi - MSFT
Introduction Consider a scenario where TMG Admin reinstalled TMG Enterprise Edition after a hardware failure and decided to rejoin the array member to the EMS. However, when TMG Admin tried to rejoin it the following error occurred: Troubleshooting The first basic step in this type of scenario is to...
on
16 Nov 2010
Blog Post:
Unable to Fail Over from one TMG node to another when using NLB in a Virtual Environment
Ori Yosefi - MSFT
Introduction This post is about a scenario where TMG Administrator was trying to simulate a failover before put the environment in production. TMG nodes were installed in a third party virtual environment. TMG was using integrated NLB with Unicast, the External TMG adapter was connected to a layer 2...
on
4 Nov 2010
Blog Post:
Understanding Performance Impact of Fast Trickling Option on TMG 2010
Ori Yosefi - MSFT
Introduction When the EMP feature is enabled, TMG will accumulate data downloaded by the client and scan all the content for malware before transferring it to the client. Accumulating the entire file and scanning it, may take a significant time. During this period of time, the client doesn't receive...
on
20 Oct 2010
Blog Post:
TMG is Unable to Listen on Port 80 (no IIS was not installed)
Ori Yosefi - MSFT
Introduction Consider the scenario where a TMG 2010 Server is installed as Hyper-V guest on a Windows 2008 Server. You publish a website on port 80 or enable HTTP to HTTPS redirection on a Web Listener for an existing SSL publishing rule. When you try to access the published website you get an error...
on
15 Oct 2010
Blog Post:
The Exchange Edge default Receive connector gets unexpectedly disabled even though the Email policy is not configured
Ori Yosefi - MSFT
Scenario You have installed Forefront TMG 2010, Exchange 2010 Edge role and Forefront Protection for Exchange (FPE) 2010 on the same machine. You do not want to use the Email policy configuration integration feature of Forefront TMG (in this case TMG won’t manage the Exchange Edge and FPE settings),...
on
15 Oct 2010
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