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Infrastructure: Port Scanning with NMAP Commands
Answer: Scan All TCP Ports with Range We can specify the port range with the -p option. As we know TCP port numbers are between 0 and ...
Microsoft 365: Reset Office Licensing and Fix "Couldn't Verify Microsoft 365 Subscription" Errors
Answer: If you encountering registration and verification errors with a 365 installation, enter the following commands in a command prompt to list and deactivate office licenses ...
Linux: Enable Relay and Rewrite Sender for Postfix in Plesk for MS 365 or Google Workspace
Answer: See the following tutorial for enabling relay and sender rewriting for Plesk and Postfix. Rewrites are important when relaying via 365 as you must use ...
Windows: Generate a Self Signed SSL Certificate with Powershell
Answer: Enter the following powershell command. This will place a certificate in the "Personal" store for the Computer. Change the AddYears variable as needed. New-SelfSignedCertificate –DnsName my.fqdn.com -NotAfter ...
Scripting: Delete Old Files and Folders/Directories with Powershell
Answer: Use the following powershell script to automate purging of old files (i.e. delete-old.ps1). Simply change the path at top and the desired age to delete. $limit ...
Quickbooks: Fix AD DNS and Quickbooks Port Conflicts: Add Excluded Ports to Active Directory Server Hosting
Answer: Running Quickbooks database server on a modern Windows AD server requires you add an excluded port range to prevent the DNS server from occupying these ...
Ubiquiti: Perform a full IPv6 reset on EdgeOS
Answer: Enter the following commands in the cli to reset the dynamic IPv6 interface. release dhcpv6-pd interface eth0delete dhcpv6-pd duidrenew dhcpv6-pd interface eth0 ...
Scripting: gvlog2em: Email GhettoVCB Logs via Windows Schedule Task and SMTP
Answer: We developed the attached Windows batch file for use with VMware and ghettoVCB. When used in conjuction with ghettoVCB's log file, it will: Pull the logfile ...
Windows: Fix L2TP Error 87, SSTP Error 720, Failed VPN Connection on Windows 10/11
Answer: This happens from time to time in Windows. I'm writing this because it just happened to one of our internal systems where L2TP had been ...
Windows: Prune / Delete Backups with Windows Server Backup
Answer: Enter the following command to keep 100 versions of backups online. You can change the number to whatever is desired in terms of retention. wbadmin delete ...

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