Due to disabling PPTP VPN support in iOS, one of my clients decided to reconfigure the VPN server running Windows Server 2012 R2 from PPTP to L2TP/IPSec. Internal VPN clients from inside LAN connect to the VPN server without any problems, however external Windows clients get the error 809 when trying to establish the connection with the L2TP VPN server:
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Windows 10
How to Remove Built-in Apps, Features & Editions from a Windows 10 Install Image (WIM file)?
September 17, 2020In this guide we’ll show how to remove Microsoft Store provisioned apps, features (capabilities), and unused Windows editions from a Windows 10 installation image (install.wim file). Let’s do it manually…
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Windows 10Windows Server 2016
How to Use and Repair Windows Recovery Environment (WinRE) on Windows 10?
September 15, 2020Windows Recovery Environment (WinRE) is the minimal OS based on Windows Preinstallation Environment (WinPE) which includes a number of tools to repair, reset and diagnose Windows. If the main host…
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The built-in SSH client appeared in Windows 10 and Windows Server 2019. Ssh.exe can be used to securely connect to Linux/UNIX servers, VMWare ESXi hosts and other devices instead of…
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PowerShellWindows 10Windows Server 2016
CHKDSK: How to Check and Repair Hard Drive Errors in Windows 10?
September 9, 2020CHKDSK.exe (check disk) is a classical built-in Windows tool for checking hard drives for errors. The chkdsk allows you to check your disk and file system for physical and logical…
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If you want to monitor the state of your VMWare ESXi servers in your monitoring system, you must configure SNMP agent on your hosts. In this article we’ll show how…
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In Windows 10 1903/1909 I have found several strange bugs related to configured VPN connections. The first problem: when trying to connect to a remote VPN L2TP server, a VPN…
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Group PoliciesWindows 10Windows Server 2016
How to Block USB Drives in Windows using Group Policy?
September 3, 2020When connecting a new USB device to the computer, Windows automatically detects the device and installs an appropriate driver. As a result, the user can almost immediately use a connected…
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Very often ‘too many open files’ errors occur on high-load Linux servers. It means that a process has opened too many files (file descriptors) and cannot open new ones. In…
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Windows 10Windows Server 2012 R2Windows Server 2016
Configuring Port Forwarding on Windows
August 28, 2020You can configure network ports forwarding in all Windows versions without using third-party tools. Using a port forwarding rule, you can redirect an incoming TCP connection (IPv4 or IPv6) from…