Chinkes At Home

Category: PowerShell

  • Using Google domains with a dynamic IP

    This is a script to read the current public IP and update your Google domain with the new IP-

    #get the current IP
$url = "https://ifconfig.co/json"
$ip = Invoke-RestMethod $url
#send the new IP to Google
$updateCommand = "https://username:[email protected]/nic/update?hostname=dynamic.domain.com&myip=$($ip.ip)"
Invoke-RestMethod $updateCommand

    Here is some documentation on Google on how to change your DNS via API- https://support.google.com/domains/answer/6147083. The short version is make a domain or subdomain dynamic. When you do this there will be a username and password generated for you, use this in the above script.

  • Setting time on Windows 2008

    I have my AD DC set the time for my network. Since it’s not really that good at keeping time I had to set the DC to pull the time from the govn’ment. I set all this via command line in Windows 2008. I would cite where I got this from but didn’t note it at the time, sorry!

    ### steps to set up NTP servers on DC ###
0. make sure UDP port 123 is open bi-directionally
1. stop time service (net stop w32time or in list of services)
2. configure external sources-
w32tm /config /manualpeerlist:"0.pool.ntp.org,1.pool.ntp.org,2.pool.ntp.org" /syncfromflags:manual 
3. set DC as reliable-
w32tm /config /reliable:yes
4: start time service (same as above)
5. check event viewer for errors

    So once the DC is ‘cool’ for time giving, how is far off is it?

    ### to check how off your time is ###
w32tm /stripchart /computer:0.pool.ntp.org /dataonly

    Then set the DC to use the internet time.

    ### to set your time to internet time ###
W32tm /resync /computer:time.windows.com /nowait

    Then on each client machine you use the following to set them to use the DC for time giving-

    ### set time from DC ### 
net time \\home.server.com /set /y

    Good luck!

    UPDATE-

    This time I made note of where I got the instructions from- https://www.faqforge.com/windows-server-2016/configure-ntp-server-windows-server-2016/. The only addition this makes is to note the PowerShell command to update on the client side.