Linux, Windows and Other Server Admin Hacks
Check open ports: How to identify the processes that are keeping ports open Windows OS For Windows operating systems, you can use netstat, which is included with the OS. On the scanned server, open command prompt. Run the command: netstat…
This document will guide you through setting up a validation server for validating OTPs from YubiKeys. What is a One-Time Password (OTP)? A one-time passcode or password (OTP) is a code that is valid for only one login session or…
Here is a simple lamp install script for CentOS 8. #!/bin/bash #update system dnf update #install apache dnf install httpd httpd-tools -y systemctl enable httpd systemctl start httpd systemctl status httpd #update firewall firewall-cmd –permanent –zone=public –add-service=http firewall-cmd –permanent –zone=public…
Flushing the DNS cache on Windows 10 is a very easy process and may be needed to connect to web sites that have changed servers. Due to system security permissions, you must ensure that you run the command prompt as…
Here we provide a particularly useful command-line command that shows you which scripts are responsible for outbound mail. For example, when WordPress themes get exploited, you will see a large number of messages coming out of a long directory inside…
Ready for a new key? You should be. The Ed25519 was introduced on OpenSSH version 6.5. It’s the EdDSA implementation using the Twisted Edwards curve. It offers a better security with faster performance compared to DSA or ECDSA. Some benefits:…
Some great scripts for stress testing and benchmark tests: https://haydenjames.io/linux-benchmark-scripts-tools/
Recently, I had the task of importing emails form a cPanel email account to Outlook. This was after the DNS had changed to the office365 servers (mail.protection.outlook.com). There is no export from Horde to PST format – only MBOX. So,…
Create a folder C:\Esxibuild Download to C:\Esxibuild VMware vSphere Hypervisor (ESXi) 6.7U3b Bundle (not the ISO). https://my.vmware.com/web/vmware/details?downloadGroup=ESXI67U3B&productId=742 Download the Realtek Drivers: https://vibsdepot.v-front.de/wiki/index.php/List_of_currently_available_ESXi_packages (For this one, I used the net55-r8168-8.045a-napi-offline_bundle) Here is what the files look like: Download and install the…
CentOS 8 uses firewalld.You can see all zones by running the following ls command: # ls -l /usr/lib/firewalld/zones/ total 36 -rw-r–r–. 1 root root 299 Nov 8 11:48 block.xml -rw-r–r–. 1 root root 293 Nov 8 11:48 dmz.xml -rw-r–r–. 1…
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