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Group Policy Slow Link Detection using Windows Vista and later
Mike here again. Many Group Policy features rely on a well connected network for their success. However, not every connection is perfect or ideal; some connections are slow. The Group Policy infrastructure has always provided functionality to detect slow Read More...
Configuring DFSR to a Static Port - The rest of the story
Ned-san here again. Customers frequently call us about configuring their servers to listen over specific network ports. This is usually to satisfy firewall rules – more on this later. A port in TCP/IP is simply an endpoint to communication between computers. Read More...
Debunking the Vista Remote Differential Compression Myth
Ned here again. Have you ever visited Snopes.com ? It’s a terrific urban legend reference where they research folklore. Snopes is the place you go to find out if eating Thanksgiving turkey makes you sleepy (it doesn’t), if Coca Cola can dissolve a tooth Read More...
Potential for Kerberos Issues When Using a Cisco VPN/ASA with Win2003 or later DC’s
Hey everyone, Rob Greene here back after a long hiatus from blogging. I had an interesting case come through that I thought many of you IT pros would be interested in. Background The customer had an issue with using Cisco VPN and Cisco ASA concentrators Read More...
Netmon, MPS, RODC's, and that new OS you might have heard about
Ned here. A few big pieces of news, in case you've been having a busy week: Netmon 3.3 has been released . You can download from here . Read more about the new features (such as autoscroll, frame commenting, experts, WWAN support, and more) right here Read More...
Using PORTQRY for troubleshooting
Hi all, Mark from Directory Services again. This time I would like to talk about one of the many tools that we use in troubleshooting network issues. At times you may see errors such as The RPC server is unavailable or There are no more endpoints available Read More...
Negotiate security support provider behavior
Greetings DS blog readers, Todd here. I wanted to talk a little about the Negotiate security support provider (SSP) and how there are times when it will intentionally use NTLM rather than Kerberos. [ And if that’s not interesting, keep reading anyway Read More...
Directory Services and more, from Madrid
Ned here again. I recently spent a week with Microsoft Support Engineers from all over the world, and bumped into a colleague that works in MS Spain, out of Madrid. She mentioned that they had a Spanish-language blog focused on Directory Services, networking, Read More...
Using Network Monitor 3 to Troubleshoot a Domain Join Failure Caused by a Black Hole Router
This is Randy again with an interesting case that I had recently. We were having problems trying to join certain workstations to the domain. We would see that every workstation in one site would join successfully and all the workstations in another site Read More...
Port Exhaustion and You (or, why the Netstat tool is your friend)
Hi, David here. Today I wanted to talk about something that we see all the time here in Directory Services, but that doesn’t usually get a lot of press. It’s a condition we call port exhaustion, and it’s a problem that will cause TCP and UDP communications Read More...
Network Browsing with Windows Server 2008
Ned here. I wanted to make sure all of our loyal readers know about an important post at our sister site Enterprise Networking: NetBIOS browsing across subnets may fail after upgrading to Windows Server 2008 While not a pure DS issue, it could definitely Read More...
Update Released to Disable Scalable Network Pack
The Microsoft Enterprise Network Team blog has posted information about a new update released for Windows Server 2003: New update available for Windows Server 2003 SP2 systems to disable Scalable Networking Pack features It is highly recommended that Read More...
Troubleshooting networks without NetMon
Hi, Ned here. You may already be asking yourself why I’m writing about network troubleshooting. Isn’t this the Directory Services blog? Don’t we just care about Kerberos and group policies and the like? Shouldn’t the Networking Read More...
Dynamic Client Ports in Windows Server 2008 and Windows Vista (or: How I learned to stop worrying and love the IANA)
Hi, Dave here. I’m a Support Escalation Engineer in Directory Services out of Charlotte, NC. Recently one of our consultants in the field deployed a Windows Server 2008 Beta 3 domain controller at a branch office to test management scenarios. After doing Read More...
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