Tag: security

I have finally configured DMARC today

A time ago I got contacted by a white-hat hacker with an inquiry about the security of one of my emails. Specifically, that my DMARC record was not set up. I immediately contacted my email provider, since I did not know if the whole thing was even legit, but I did not get a very …

Using electronic ID on Arch in Slovakia

Some months ago I wrote an article about the smartcard and shown a possible way to initialize communication with it on Arch Linux and the notebook equipped with smartcard reader, in my case a trusty T470. The basis for making the smartcard reader work is to install the required p…

Fighting Docker iptables on Arch

A strange issue I could not find a meaningful explanation anywhere regarding running docker-compose script and iptables firewall on Arch Linux. Steps to reproduce assume bare iptables, Docker and docker-compose available. Step 1. Start Docker Start the docker.service via systemct…

GnuPG security token has arrived

I have started learning more about the GnuPG security tokens fairly recently in the post about GitHub automatic commit signing. Links in that post provide for some great read too, go check it out if you are interested. GnuPG security token is a device that stores the keys on the …

Wildcard certificate with acme.sh

This post is a sequel to my previous post. The post demonstrated how to setup HTTPS for Nginx by obtaining a certificate via 3rd party client called acme.sh. There is also some basic underlying theory about these terms. Consider reading it if feeling uncertain. Start by creating …