[German]I'll take up a topic for the readership that Frank Carius noticed when he recorded an RTP session via UDP using Wireshark. In the recording, he found a large number of UDP broadcast packets on ports 22222 and 3289. Of course, the question immediately arose as to what was causing these UDP broadcasts.
[German]Two weeks ago, Microsoft released CU15 for its Exchange Server 2019. A blog reader contacted me yesterday because he came across a nice change during testing. Server certificates can now (again) be updated directly via GUI – the recourse to PowerShell required with CU14 is no longer necessary.
[German]A quick reminder that Microsoft is getting serious about hardening Windows clients and servers for the Kerberos protocol as early as February 2025. Microsoft has also introduced a string length limit to the Kerberos policy for host names. Here is a reminder of the timelines for phased hardening and string length limitation in the Kerberos host-to-realm policy, which was introduced in February 2025.
[German]Is there a problem with resource consumption by the Virtual Machine Memory Manager (Vmmemcm) in Windows 11 24H2, which then leads to the system freezing? I have had reports of this since December 2024 – and there seems to be a connection with the sandbox.
[German]Security experts from Qualys TRU have discovered two vulnerabilities in the OpenSSH software. In addition, an advisory on another vulnerability was published on February 11, 2024. OpenSSL 3.4, 3.3 and 3.2 are affected by this vulnerability, although upgrades to newer OpenSSL versions are available.
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[German]Quick note for administrators of Microsoft Office 365 (or MS365) systems. Microsoft has adjusted the DKIM value for signing emails without much notice.
[German]I am once again addressing the issue of RDP problems under Windows 11 (24H2) here on the blog. After there were already corresponding reports in January 2025, further user comments are appearing that also report problems with Remote Desktop Protocol (RDP) connections in the context of the February 2025 security updates. Here is a brief summary.
[German]Brief update for users who sign in to services online with Microsoft accounts. From February 2025, Microsoft wanted to keep users signed in when they leave the service. This has now been withdrawn, as it could have become a problem if multiple users or accounts were used.
[German]I have received a tip from the administrators among the blog readers that the February 2025 update (KB5051974) for Windows 10 22H2 can lead to massive start menu problems. A search on the web shows me that there are others affected. Could this also be observed in the readership?
[German]Mozilla Firefox 115 ESR still runs on Windows 7 / 8.1 and has been in extended support for some time. It was previously known that the developers wanted to support this browser version until March 2025. The Mozilla developers have now confirmed that Firefox 115 ESR support for some older Windows and macOS operating systems will be guaranteed until September 2025.
MVP:
2013 – 2016
WIMVP:
2017 – 2020
