A word on disabling a wireless connection when also connected to a physical network

We get questions from customers asking how they can disable a wireless connection when they are connected to a physical network. There can be various reasons for wanting to do this but they are often misguided. First let me say – Windows does not currently have the ability to disable a Wireless connection when connected… Read more

The Windows Firewall Service Fails to start – Introduction

There can be several causes that will prevent the Windows Firewall from starting and I will attempt to cover them in this series of five blog posts. In this first post, I will cover Windows XP and Windows Vista / Windows 7 separately as they are two different services. Last I will cover one issue… Read more

TCP DupACKs and TCP Fast Retransmits

Hello all, my name is Mehul and I am with Platforms Networking support. We receive many calls dealing with slow file transfer when copying files using TCP (such as SMB file copying or FTP file transfer). The recommended approach to troubleshoot these scenarios is to take Network Monitor traces at the source and the destination…. Read more

Technology Details and Solutions on TechNet

I recently read a post by Joseph Davies over at the WSiX Network Connection blog about a resource on TechNet I hadn’t seen before that many of our readers may be interested in. The Windows Server Information eXperience guys have been hard at work updating the Networking and Access Technologies page on TechNet. This is… Read more

New Networking-related articles for the week of September 12 – September 18

Hi all – this week I have 5 new networking-related articles to share with you: 2366024 Primary DNS suffix for a Windows server 2008, Windows server 2008 R2, Windows 7, Windows Vista, deployment using an Answer file may not be set. 2282988 DNS Model for MBCA 2.0 for Windows Server 2008 – download location +… Read more

Network Location Awareness (NLA) and how it relates to Windows Firewall Profiles

I am writing this blog post because we get a lot of questions regarding how NLA determines a network profile and how it relates to Firewall Profiles as the two are often confused. What is NLA? First let’s start with what NLA does. For each network interface the PC is connected to, NLA aggregates the… Read more

How TCP TIME-WAIT Assassination works

Can a port be re-used before TIME-WAIT expires? In a TCP conversation, the communicating peers use port numbers to communicate with each other. The way they uniquely identify the sessions is with a four tuple (Source IP address, Source Port, Destination IP address, Destination Port). The four tuple represents a unique socket over which full… Read more

New Networking-related KB articles since May 8

I’d like to apologize for not having any new KB articles to post for the past several weeks; some changes have been going on with the tools I use to find this information. Here are the most recent networking-related KB articles since my last entry on May 13th. I apologize in advance for any duplicates:… Read more

New Networking-related KB articles for the week of February 7 – February 13

We have had a couple of lean weeks recently with very few new KB articles to report, but that is certainly not the case this time around! Here are the latest networking-related KB articles: 979554 The creator of an SNMP trap notification cannot be identified in Windows Server 2003 978972 Stop error message when you… Read more