Test-NetConnection – excellent replacement for Telnet, Ping and Tracert Testing

Microsoft continues to add functionality to PowerShell, however unless you specifically keep up with PowerShell, you're unlikely to realize what these updates are and how convenient they make life (compared to the previous/status quo). When testing TCP port connection, most people think immediately of telnet. While it works OK to let you know if a … Continue reading Test-NetConnection – excellent replacement for Telnet, Ping and Tracert Testing

Why you should never use Microsoft DHCP SuperScopes

Recently, I had to troubleshoot an issue where users moving between floors with different subnets/vlans were not getting the correct LAN IP address (i.e. first floor was 192.168.1.0/24 and second was 192.168.2.0/24). Verified the network devices had IP Helpers, even temporarily disabled DHCP failover (2012R2+ feature) to rule that out - nothing. Whenever the machine … Continue reading Why you should never use Microsoft DHCP SuperScopes

NETLOGON ERRORS DUE TO RPC MISMATCH BETWEEN WINDOWS CLIENTS AND DOMAIN CONTROLLERS

Recently, I had a client who had a relatively fresh AD environment as a result of a divestiture, however, they had stood up their domain controllers at different time periods during the environment build out. As such, their DC's each had different hardening settings depending on which build they used (and what levels of hardening … Continue reading NETLOGON ERRORS DUE TO RPC MISMATCH BETWEEN WINDOWS CLIENTS AND DOMAIN CONTROLLERS