ENE-NG and GNS3 – Speed and Duplex Mismatch
Duplex Mismatch KB ID 0000983 Problem I don’t know why this happens sometimes with GNS3, and EVE-NG but occasionally I will get a connection between two devices that constantly complains. %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on {interface-name} (not half duplex), with {host-name} {interface-name} (half duplex). For the uninitiated, a speed/duplex mismatch, usually happens when both ends of the link are set...
Google Chrome Browser – ‘Your connection is not private’
Connection is not private KB ID 0000992 Problem Just went to open a secure web page, and got this message. Solution : Connection is not private Turns out that this is the new default behaviour for Chrome when accessing https (secure web) sites. My Chrome bowser auto updates, and has updated to Version 37.0.2062.103 m. 1. Select Advanced > Proceed to {URL you are trying to access}. 2. The next time you visit THIS URL it will...
Logging Powershell Execution
Logging PowerShell KB ID 0001903 Problem Monitoring PowerShell execution, (especially on critical servers like domain controllers), is essential for detecting potential malicious activity. PowerShell activities generate specific Event IDs in the Windows Event Log. Solution : Logging Powershell The following Event IDs are logged connected to PowerShell execution. Command Line Auditing: Event ID 800 (Microsoft-Windows-Sysmon/Operational...
Upgrade Windows 10 to Windows 11
Upgrade Windows 10 to Windows 11 KB ID 0001902 Problem As you may already know, Microsoft will officially end support for Windows 10 on October 14, 2025. This means no more security updates, bug fixes, or feature improvements! While your PC will still function, it will be at greater risk for viruses and malware – and yes – that does mean businesses and home users alike. So it’s crucial to start planning your transition to...
RDP Issue Post Windows 11 24H2 Upgrade
RDP Issue KB ID 0001901 Problem: RDP Issue Post updating Windows 11 to version 24H2, remote desktop connections to older systems i.e. running Windows 7 or Windows Server 2008 R2, encounter issues with displaying graphical content properly. Reverting to the earlier version of Windows 11 RDP (23H2) does resolve the issue. Connections to devices with newer operating systems remain unaffected. Solution: RDP Issue Note: You can simply use...
Error 1722 There is a problem with this Windows Installer package.
Error 1722 KB ID 0000985 Problem Error 1722 is a pretty ‘generic’ windows installer package error. When attempting to install the AnyConnect client software this happened; Error 1722. There is a problem with this Windows Installer package. A program run as part of the setup did not finish as expected. Contact your support personnel or package vendor. Action VACon_Install, location: C:Program FilesCiscoCisco AnyConnect...
Cannot Join Domain?
Cannot Join Domain KB ID 0000534 Problem The primary cause (99.99% of the time) a client cannot connect to, or join a domain is DNS related. The specified domain either does not exist or could not be contacted Solution : Cannot Join Domain 1. To Troubleshoot you need to know the IP address of your DNS server, In many cases it’s on the first domain controller but that’s not always the case so find out (go to a WORKING...
Run PowerShell (and Command Prompt) Administratively
KB ID 0000988 Problem We had the ‘run as’ service way back in Windows 2000, so the concept of running a command window ‘as administrator’ should not be difficult to understand. But the amount of times I tell people ‘You need to run that as administrator’, and they reply ‘I AM an administrator’ is far too high. With PowerShell theres no way of knowing, and with command prompt the...
Enable PPTP Split Tunneling
PPTP Split Tunneling KB ID 0000997 Problem I was asked yesterday, “When you get five minutes, I need you to enable PPTP split tunneling, because when I VPN into a network I lose Internet connectivity”. On inspection he was using the Microsoft VPN client, I jumped on the VPN device to discover it was a Cisco IOS router. What I discovered was, unlike the firewall VPN’s I’m used to, you DONT set split...
Juniper JUNOS SRX NAT – Static ‘One-to-One’
SRX NAT KB ID 0000995 Problem Setting up ‘Static NAT’ is the process of taking one of your ‘spare’ public IP addresses, and permanently mapping that public IP to a private IP address on your network. In the example above I want to give my web sever which has an internal IP address of 192.168.1.10/24, the public IP address of 1.1.1.5/24. So if someone out on the Internet wants to view my website, they can...