Powershell

March 27 2020

Windows Static Route Recovery

Travis Networking, Operating Systems, Powershell, Virtualization, Windows 0

If you have messed up the routing table on a remote Windows Server, this network adapter recovery method may help you or inspire one even better. Since my particular issue happened over 5 years ago I’m honestly having a hard time remembering the exact scenario, but obviously there was a communication problem due to accidental static route deletion. The remote computer still needs to have layer 3 connectivity with your own client machine which might entail putting yourself in the same broadcast domain if that is do-able. psexec.exe \\ServerName -s powershell Enable-PSRemoting -Force Invoke-Command -ComputerName ServerName -ScriptBlock {route add -p

April 20 2019

Force Delete Windows Server DHCP Failover Relationship

Travis Active Directory, DHCP, Networking, Operating Systems, Powershell, Windows Remove-DhcpServerv4Failover 0

If you’ve found yourself here then chances are you messed up one of your domain controllers or at least one of your DHCP Servers. I admit I did. More than once. And I’m tired of querying for the elusive Remove-DhcpServerv4Failover PowerShell script to force delete the Windows Server DHCP failover relationship. The way content makes its way onto this site is usually split into two categories: Repetition, and one time specialized content not found on the internet (at least difficult). Pick the server you want to keep. Look at your DHCP leases and determine which might be the most

January 20 2019

Output IP Address with ipconfig Findstr Ethernet Adapter

Travis Linux, Networking, Operating Systems, Powershell, Shell, Windows Clink, Cmder, Conemu 0

How many times have you entered ipconfig /all at the command line to return a single IP address, then have to strain your eyes sifting through mostly unwanted networking info (subnet mask/gateway/DNS/mac address)? As a sysadmin, after rinsing and repeating this process nearly every day of your waking sysadmin life, this tends to lean towards the monotonous side. What I would like to propose is to declare an environment variable which utilizes native Windows CLI tools which strips out the information you don’t need while leaving the gold behind, the IP address. Create a short and easy environmental variable so that the

January 30 2015

Powershell Excel.Application Task Scheduler Automation

Travis Powershell, Windows 0

Using the Excel.Application com object in Powershell won’t save a file through the task scheduler for automation. It’s likely a DCOM permissions issue. Automating Excel is sometimes fraught with peril… The only way I’ve found around issues such as this is to set Excel to run as a specific user through DCOM permissions.

January 22 2015

Active Directory Migration 2003 to 2008 R2

Travis Active Directory, Exchange, Powershell, Windows 0

A few years ago in a past life I performed an Active Directory inter-forest migration from domain functional level 2003 to 2008R2 using ADMT 3.2 and PES 3.1 (x64/x86). An Exchange Server mailbox migration from 2007 to 2010 was performed simultaneously. The only problem I ran into was that the old X.500 addresses for the mailboxes aren’t migrated to the new mail system. The cached auto-complete email addresses in Outlook use the X.500 address for internal emails which caused internal to internal email to fail. Once the auto-complete addresses were wiped out everything was fine and Outlook began creating new

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