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Tag Archives: Network
Windows: SMB Signing required soon (now available in Windows 11 Insider Preview)
[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
Microsoft's TCP mess, how to optimize in Windows 10/11
[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
Windows 11 22H2: Network printers communitcate now via RPC over TCP by default
[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
Network: Simulate packet loss and latency with clumsy
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.
Office 2016: Documents cannot be stored on network shares
[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
Why ISL Online: Critical factors when choosing a remote desktop solution
[Sponsored Post]In the rapidly evolving IT world, choosing the right remote desktop software is critical for organizations that value security, ease of use and reliability. One provider of secure remote access that has been on the market since 2001 is ISL Online, which presents some considerations for choosing such software below. More ...
CallStranger UPnP bug allows data theft, DDoS etc.
[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.
Windows 10: SMBleed vulnerability in SMBv3 protocol
[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.
News about the Windows SMBv3 vulnerability SMBGhost
[German]A brief update to the SMBGhost vulnerability CVE-2020-0796 in the SMBv3 protocol in Windows 10 version 190x and Windows Server 2019, although Microsoft has released an update to close the vulnerability. However, this update causes installation errors on some systems. … Continue reading
A Scanner for Windows SMBv3 Vulnerability CVE-2020-0796
[German]A short tip note for administrators on enterprise networks who want to verify that Windows servers are vulnerable to the unpatched SMBv3 vulnerability CVE-2020-0796. There is a Pyton script for this purpose.
Windows SMBv3 0-day vulnerability CVE-2020-0796
[German]There is a serious but unpatched vulnerability in the SMBv3 network protocol in Windows. This could allow the spread of worms, but is not currently exploited. Microsoft provided the information in a security advisory yesterday.