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Networking Blog

The Official Blog Site of the Windows Core Networking Team at Microsoft

  • 72 Blog Articles
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10K

Deploying HTTP/3 on Windows Server at Scale

nibanks on Oct 12 2021 12:40 PM
We've recently started deploying HTTP/3 to Exchange Online servers globally and have some pretty exciting data to share!
1,300

Network ATC: Common Preview Questions

Dan Cuomo on Sep 27 2021 09:07 AM
Network ATC has received some great feedback during its time in preview. We’ve heard that you love how it: Simplifies de...
5,529

What's QUIC?

JamesKehr on Aug 25 2021 06:58 AM
This is a quick discussion, all puns intended, about why QUIC is important to the modern internet.
5,764

Enabling HTTP/3 support on Windows Server 2022

tojens on Aug 24 2021 06:00 AM
Instructions for enabling HTTP/3 for your Windows Server-based web services
5,789

Windows Insiders gain new DNS over HTTPS controls

tojens on Jun 29 2021 06:00 AM
A recap of the new ways Insiders can configure the use of DNS over HTTPS on Windows
3,154

Network ATC in Preview on Azure Stack HCI

Dan Cuomo on May 27 2021 11:50 AM
Azure Stack HCI is a subscription service that, like Office 365 or Windows 10, continually get free updates. The next up...
6,671

Algorithmic improvements boost TCP performance on the Internet

huanyi on May 11 2021 07:56 PM
We will walk through our journey and show how we made big strides in improving performance between Windows Server 2016 a...
18.8K

Making MsQuic Blazing Fast

nibanks on Apr 14 2021 11:13 AM
In the last year, MsQuic upload speeds have more than quadrupled! Come read about all we've done for MsQuic performance.
5,017

Troubleshooting Switch Misconfiguration

Dan Cuomo on Mar 19 2021 01:46 PM
It can be difficult to determine if you host can't communicate because of a host or physical network configuration. The ...
2,154

Azure Kubernetes Service on Azure Stack HCI Parity with AKS PowerShell

jessicaguan on Mar 03 2021 09:00 AM
Azure Kubernetes Service on Azure Stack HCI's most recent release with PowerShell updates to align more with Azure Kuber...
2,901

Quick Tip: Does my NIC support VMMQ?

Dan Cuomo on Feb 22 2021 11:49 AM
This article gives a brief overview of VMMQ and provides a pointer on how to quickly identify if your adapters support t...
49.4K

Calico for Windows goes Open Source

mkostersitz on Sep 22 2020 07:08 AM
Over the last couple of years Microsoft and Tigera have been working together to close some significant gaps in the Wind...
65.4K

Windows Server Insiders getting gRPC support in Http.sys

tojens on Jul 22 2020 06:00 AM
Announcing new Http.sys features to support gRPC 
14.2K

Pointer: Domain Time Synchronization in the Age of Working from Home

Dan Cuomo on Jun 05 2020 09:04 AM
Working from home has presented challenges in many areas and it is true for time synchronization on computers used at ho...
101K

Introducing Packet Monitor

george-guirguis on May 22 2020 06:00 AM
Packet Monitor is an in-box cross-component network diagnostics tool for Windows.
145K

Windows Insiders can now test DNS over HTTPS

tojens on May 13 2020 10:00 AM
This post will explain how to use DoH as a Windows Insider
48.7K

MsQuic is Open Source

Daniel Havey on Apr 28 2020 03:49 PM
Microsoft is open sourcing our QUIC library, MsQuic, on GitHub under an MIT license. MsQuic is a cross-platform, general...
25.5K

Introducing SDNSecurityToolkit

tojens on Apr 01 2020 06:00 AM
A new tool for analyzing vulnerabilities in SDN deployments
54.7K

L2bridge Container Networking

David Schott on Mar 05 2020 06:00 AM
L2bridge networking is widely used in software-defined data centers thanks to its high configurability, performance, rel...
62.2K

Teaming in Azure Stack HCI

Dan Cuomo on Feb 03 2020 06:00 AM
Windows Server currently has two inbox teaming mechanisms with two very different purposes. In this article, we’ll descr...
142K

Windows will improve user privacy with DNS over HTTPS

tojens on Nov 17 2019 09:00 PM
Announcing and explaining our intention to support DNS over HTTPS in future versions of Windows
38.8K

Windows Containers and Rancher 2.3

mkostersitz on Oct 08 2019 09:05 AM
Container technology is transforming the face of business and application development. 70% of on-premises workloads toda...
32.2K

Disabling Legacy TLS

Gabriel Montenegro on Oct 02 2019 06:00 AM
Please read our blog on new capabilities in Windows Server 2019 to enforce improved security on connections.
31.7K

Evolution of Timekeeping in Windows

tojens on Aug 05 2019 06:00 AM
A document providing an overview of the time keeping improvements in Windows.
46.5K

Direct Server Return (DSR) in a nutshell

mkostersitz on Jun 19 2019 06:00 AM
TL;DR; A question we get asked quite a bit is: "What is Microsoft doing to improve Networking performance?" To answer th...
35.6K

Synthetic Accelerations in a Nutshell – Windows Server 2019

Dan Cuomo on May 29 2019 06:00 AM
This is the final post covering synthetic accelerations covering Windows Server 2012, 2012 R2, 2016, and 2019. We recomm...
20.6K

DPDK releases v19.05, introduces Windows Support!

Harini Ramakrishnan on May 22 2019 11:02 AM
Windows support for DPDK merges into the community maintained repository with v19.05 release!
27.6K

Troubleshooting Kubernetes Networking on Windows: Part 1

David Schott on May 15 2019 06:00 AM
Kubernetes is not easy to troubleshoot – even if you’re an expert. There are multiple components involved in the creatio...
23.5K

Synthetic Accelerations in a Nutshell – Windows Server 2016

Dan Cuomo on May 08 2019 06:00 AM
This is the third in a series of posts covering synthetic accelerations covering Windows Server 2012, 2012 R2, 2016, and...

Latest Comments

tojens
in Enabling HTTP/3 support on Windows Server 2022 on Oct 25 2021 03:12 PM
Thank you to everyone for sharing their experiences. We will be publishing another post to help highlight some of the challenges each of you have run into. Please note (I need to write more about this) that the reg key enables the HTTP/3 altsvc frame; it does not add an HTTP response alt-svc header....
0 Likes
webwiz
in Enabling HTTP/3 support on Windows Server 2022 on Oct 21 2021 06:19 AM
I have tried restarting the server, but I find it is the same on all our Windows Server 2022 web servers, the only way to get QUIC working in Chrome it sending the alt-svc: h3=":443"; header. We are also having to disable QUIC in the IIS bindings on busy websites, or find that msquic.sys driver uses...
0 Likes
Nobu_Hashi
in Enabling HTTP/3 support on Windows Server 2022 on Oct 21 2021 05:58 AM
If you changed the settings on "Edit Site Binding" dialogue, you need to restart the OS(http.sys service).
0 Likes
webwiz
in Enabling HTTP/3 support on Windows Server 2022 on Oct 20 2021 03:14 AM
I have tried setting EnableAltSvc registry and checking the "Require Server Name Indication" on "Edit Site Binding" dialogue and find that it doesn't work, at least not in Chrome, you still have to set the alt-svc: h3=":443"; header for Chrome to use QUIC.
0 Likes
Nobu_Hashi
in Enabling HTTP/3 support on Windows Server 2022 on Oct 20 2021 01:51 AM
Set EnableAltSvc registry and check "Require Server Name Indication" on "Edit Site Binding" dialog. Browser will receive AltSvc HTTP/2 protocol message and try to connect over HTTP/3. [Use ASP.NET Core with HTTP/3 on IIS]https://docs.microsoft.com/en-us/aspnet/core/host-and-deploy/iis/http3?view=asp...
0 Likes