Tag Archives: Network

Windows 11 network traffic generates twice as much CPU load as Windows 10

Posted on 2023-06-28 by guenni

[German]Within the blog post Windows 11: Optimize network transfer performance and CPU load – part 2 I mentioned, the the exploit protection implemented in Windows 11 may causes a hight CPU load. But there is more,  also Windows 11 Phishing … Continue reading →

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Windows 11: Optimize network transfer performance and CPU load – part 2

Posted on 2023-06-27 by guenni

[German]Windows 11 has a problem with network throughput when receiving files. In part 1, I had presented some measurements that a blog reader had taken during tests to analyze the weakening network throughput and the high CPU load under Windows … Continue reading →

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How to find weak passwords in Active Directory and eliminate them with PowerShell

[Sponsored Post]Weak or compromised passwords are a known gateway for attackers. If you are able to identify which users in Active Directory (AD) are threatened by this, then PowerShell can help to remedy it. However, PowerShell scripts cannot eliminate basic AD deficits, other tools are needed for this. More ...

Windows 10/11: Poor network transfer performance, high Windows 11 CPU load – Part 1

Posted on 2023-06-26 by guenni

[German]When transferring data over a network, Windows has an amazing but unattractive effect. If you copy data between machines with Windows 10 and Windows 11, Windows 11 consumes 2 to 3 times more CPU power than Windows 10. In addition, … Continue reading →

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Windows: SMB Signing required soon (now available in Windows 11 Insider Preview)

Posted on 2023-06-03 by guenni

[German]Microsoft will require the so-called SMB signing (through security signatures) in Windows 11 and later also in Windows 10. This is supposed to protect systems in enterprise environments against NTLM relay attacks. The feature in question is being rolled out … Continue reading →

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Microsoft's TCP mess, how to optimize in Windows 10/11

Posted on 2023-02-14 by guenni

[German]Microsoft has made a few mistakes in the TCP implementation of Windows 10 and Windows 11 that severely limit the possible performance of TCP/IP connections. A blog reader brought this to my attention and immediately pointed out ways to possibly … Continue reading →

Posted in issue, Windows | Tagged , , | 6 Comments
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Windows 11 22H2: Network printers communitcate now via RPC over TCP by default

Posted on 2022-11-01 by guenni

[German]Note to administrators in corporate environments who manage Windows 11 clients and are upgrading to version 22H2. There is a change in the connection of network printers, the connections are now done with RPC over TCP, as Microsoft has disclosed … Continue reading →

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Network: Simulate packet loss and latency with clumsy

Posted on 2020-11-21 by guenni

If you want to simulate disturbances with high latency and packet loss in a network for troubleshooting, you can use the tool clumsy. The tool allows to worsen the network conditions under Windows in a targeted way. Advertising

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Office 2016: Documents cannot be stored on network shares

Posted on 2020-09-14 by guenni

[German]A German blog reader contacted me for an observation. He has been getting for weeks  more and more messages from users in his enterprise network with Windows Server 2012, that Office documents sporadically cannot be stored on network shares. On … Continue reading →

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CallStranger UPnP bug allows data theft, DDoS etc.

Posted on 2020-06-11 by guenni

[German]Currently, billions of devices are at risk from a bug if UPnP is used there. The vulnerability, called CallStranger, allows for data extraction, denial of service (DDoS) attacks, and internal network scanning. Advertising

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Windows 10: SMBleed vulnerability in SMBv3 protocol

Posted on 2020-06-11 by guenni

[German]Another critical vulnerability has been discovered in the Server Message Block 3.1.1 (SMBv3) protocol of Windows 10/Server Core, which allows access to the kernel memory. But there are patches and mitigations available. Advertising

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