This month's Windows Server updates are causing several problems, including VPN and RDP connectivity issues on servers with Routing and Remote Access Service (RRAS) enabled.
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RRAS is a Windows service that provides additional TCP connectivity and routing capabilities , including remote access or site-to-site connectivity using virtual private networks (VPNs) or dial-up connections.
Last week, Microsoft released Windows Server 2019 2012 R2 updates KB5014746 , Windows Server 2019 KB5014692 , Windows Server 20H2 KB5014699 , and Windows Server 2022 updates KB5014678 as part of the June 2022 Patch Tuesday.
However, after deploying these recent updates, Windows administrators reported encountering several issues that could only be resolved after completely uninstalling the updates.
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One of the most serious issues is servers freezing for several minutes after a client connects to the RRAS server with SSTP.
The vast majority of reports related to these issues have a common theme: loss of connectivity on servers with Routing and Remote Access Service (RRAS) enabled where Windows Server updates have been installed.
Many administrators have reported on Reddit and in comments that they are experiencing issues with LLTP/SSTP VPN and RDP clients failing to connect after installing Windows Server updates.
While it's unclear what causes these issues, Microsoft has patched a Windows Network Address Translation (NAT) denial of service vulnerability tracked as CVE-2022-30152 that may have introduced bugs in RRAS connectivity.
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To address these issues, Microsoft has released a hotfix that you can install immediately. However, if for some reason you are unable to install it, the only way to resolve these issues on servers is to uninstall the corresponding cumulative update for your version of Windows Server.
