Cumulus Constructor

MacOS Time Machine SMB Backup Access Denied Troubleshooting

MacOS Time Machine SMB Backup Access Denied Troubleshooting

I recently tried going to my Time Machine SMB share on my Mac, double clicked the .sparsebundle file used for the backup, and was was surprised with the below error.

How Email Works

How Email Works

Background Email is an interesting service to implement when compared to other services. Most services require you to setup the service to listen on a particular port and sometimes implement authentication or encryption in order to use the service. Webservers, for example, simply require a service to listen on port

Introduction to the World of Cryptocurrencies

Introduction to the World of Cryptocurrencies

Cryptocurrencies (crypto) have had a storied history since Bitcoin first launched in 2009. Let's learn in more detail about how you can buy, use, store, and invest with crypto.

Okta as an Identity Provider for Azure Portal/Office 365

Okta as an Identity Provider for Azure Portal/Office 365

There are two ways to setup Azure Portal logins with Okta. The first easy but naive way is with the Okta app named Azure Portal Login. The second is with the Office 365 Application which actually directly manages your users from Okta with WS-Federation.

How OpenBSD's spamd Works

How OpenBSD's spamd Works

Running an SMTP server to send and receive email can be a tricky task because it requires more trust of anonymous users than many other services. OpenBSD's spamd is a program that was designed to dynamically determine who is a legitimate sender and who is a spammer.

When gpg --import doesn't work

When gpg --import doesn't work

I recently decided I should find and transfer my PGP private key. Once I found it, I ran into an interesting problem where I had the private key file, but I could not, for the life of me, get GPG to import it into a new keychain on my new machine.

Ubuntu Network Managers

Ubuntu Network Managers

I've been using Ubuntu since 8.04 (Hardy Heron), and that is what I used to learn the basics of Linux. Back then, basic network configurations were done in /etc/network/interfaces. That was until 17.10 when Netplan was introduced.

Plaintext and SSL/TLS Service Debugging

Plaintext and SSL/TLS Service Debugging

Speaking directly to a server is a great way to learn how a protocol works as well as debug a service's configuration.

openmediavault Setup on a Raspberry Pi

openmediavault Setup on a Raspberry Pi

Setting up a raspberry pi with openmediavault for a home NAS and securing it can be an easy afternoon project for beginners as well as professionals