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Donation Time 2020

December 26, 2020 by Albert Valbuena

This 2020 has been a difficult year for everyone. Because of this difficulty and the opportunities I had the chance to take, I’ve been able to contribute back to the open source community, not just with content here in Adminbyaccident.com, advocacy for a few tools such as my favorite OS (FreeBSD) and the usual mouthful on the OSS goodness, but with a scarce element: … [Read more...]

How to configure TLS 1.2 on UNIX or GNU/Linux

July 26, 2020 by Albert Valbuena

This is an article willing to help and point out a few useful resources for those using Apache HTTP or NGINX web servers that are still using the deprecated SSLv3, TLS 1.0 and/or TLS 1.1 verions. 0.- The what and the why. Believe it or not there are still millions of servers still using those deprecated versions of SSL and TLS protocols. Shodan.io has a report on this … [Read more...]

How to install Ansible on FreeBSD

May 14, 2020 by Albert Valbuena

Ansible is a very useful tool geared to system’s configuration and applications deployment. In this how to install Ansible on FreeBSD I will briefly explain what the tool is, what it does, what it does not and how to install it on FreeBSD. I will also demonstrate very basic use and on a later article I will write about software deployment and maintenance through … [Read more...]

How to mirror disks on FreeBSD’s ZFS

May 11, 2020 by Albert Valbuena

This article is not going to be a long, detailed, specialized how to. I just wanted to share the ease and the fantastic quality of ZFS for a dead simple need I had. A spare box with a spare disk doing nothing could be repurposed as a file share box at home. Mirroring the two disks would allow me to have a reliable file server. If one disk goes south the other one will still … [Read more...]

Nmap cheatsheet

May 10, 2020 by Albert Valbuena

Nmap is a discovery tool used in security circles but very useful for network administrators or sysadmins. One can get information about operating systems, open ports, running apps with quite good accuracy. It can even be used in substitution to vulnerability scanners such as Nessus or OpenVAS for not very large environments, or quick audits. This is not a long explanatory … [Read more...]

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Recent Posts

  • The CentOS party is over, isn’t it?
  • Donation Time 2020
  • How to configure TLS 1.2 on UNIX or GNU/Linux
  • How to install the Clamav antivirus on CentOS 8
  • 100 articles mark at Adminbyaccident.com
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  • How to work with Nessus scan results
  • How to install Ansible on FreeBSD
  • How to secure the ELK stack on CentOS 8
  • How to mirror disks on FreeBSD’s ZFS
  • Nmap cheatsheet
  • Nessus vulnerability scanner
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  • How to install OSSEC agents on Windows
  • Exploiting CVE-2019-0708 Remote Desktop Protocol on Windows
  • Microsoft’s Patch Tuesday – April 2020
  • Web credentials stealing
  • ARP spoofing attacks
  • How to install OSSEC server on Ubuntu
  • How to upgrade MariaDB on FreeBSD

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