How to add an Out of Office message in Office 365 using powershell

I know it’s a simply task to do from OWA, but if you want to add an Out of Office message for another user, you will have to reset it’s password, login into OWA and setup the message there. But I don’t want to reset the user’s password. So, after connecting to office 365, use … Continue reading How to add an Out of Office message in Office 365 using powershell

How to deal with “RSA server certificate is a CA certificate (BasicConstraints: CA == TRUE !?)” problem

If you see [warn] RSA server certificate is a CA certificate (BasicConstraints: CA == TRUE !?) in you apache error.log file means you have created a cert that is intended to be used to sign other certs, but you’re using that cert as your SSL cert. So, it depends how you create the SSL cert. … Continue reading How to deal with “RSA server certificate is a CA certificate (BasicConstraints: CA == TRUE !?)” problem

Set port knocking with knockd and iptables

This document describes a stealth method to externally open ports that, by default, are kept closed by the firewall. Server side 1. Install knockd 2. Configure knockd Notes: sequence – the sequence required to open desired port seq_timeout – time to wait for a sequence to complete Start_Command – command to be executed when a … Continue reading Set port knocking with knockd and iptables