• Linux,  Open Source Software,  Raspberry Pi,  Ubuntu

    Install Rocket Chat server on a Raspberry Pi using snap on Ubuntu Server 20.04

    Wow that is a long title! Here I will be posting the steps on how to install the Rocket Chat Server quickly and easily using snap on Ubuntu Server 20.04. I wanted a quick and easy chat server for home use which runs on an old Raspberry Pi I have and this seemed to be the quickest and easiest way to get a chat / instant messaging server running. Let’s get starting shall we? Flash Ubuntu 20.04 to an SD card using the Raspberry Pi imager by opening Raspberry Pi imager. If you don’t have it then install it using the Pop_Shop in Pop_OS! Otherwise download it from here. Choose…

  • Exchange Online

    free/busy not working between EOL and on premise Exchange

    We had an issue after adding a new domain to our tenant using the Hybrid Configuration Wizard which removed the URI and URL strings in the availability settings in Exchange Online. That was resolved but 2 days later free/busy from Exchange Online to on premise Exchange users broke again. We had to add a new SAN in the certificate for Exchange and suspect that the Federation Metadata did not properly update. One of my colleagues found this article which pointed us to the problem and advised us how to resolve the issue. In short running:   Test-FederationTrust -UserIdentity yourcredentials showed the issue. To resolve my colleague ran:   Get-FederationTrust |…

  • Linux,  Manjaro

    Installing Manjaro

    I started using Manjaro on my laptop and found that installing applications and using it differs quite a bit from the Ubuntu distributions that I am used to. I started this mini series to show how to use it, install the OS, install applications and show off some features I found that works great. The below video shows the installation and some features of Manjaro using the Gnome desktop environment.

  • Uncategorized

    Start of a better year?

    As per my other blog, 2020 is likely a year that most if us wants to forget. Here’s to a better and prosperous 2021 to everyone in the world. This year I’m focusing a lot more on Linux, programming and Information Security as a whole. My Programming and Information Security articles and journey can be found at the link above. Here I will continue blogging about more techie and operations stuff. Keep learning and have a good year everyone.

  • Firewalls,  Linux,  News,  OPNSense,  Raspberry Pi,  Security

    Redesign of my home network

    I have started a redesign of my home network. In short I installed and configured an OPNSense firewall with the WAN, LAN and Wifi segmented. More on the OPNSense installation later. I will be moving my CentOS file server and all current networked devices behind the OPNSense firewall. This includes all PC’s, Raspberry Pi’s, Televisions etc.

  • Linux,  Open Source Software,  Security

    Unable to run Securstick from USB disk

    I recently found Securstick which encrypts a folder on a USB stick and supports Linux, MacOS and Windows. The application runs from the USB stick and opens a browser where you type the password to decrypt the contents. Unfortunately the application would not run from my USB disk on Pop!_OS but i found this post and followed the steps from the user GopherBaroque which resolved the issue for me. Just in case the steps are also below: Open your terminal Determine the UUID of the drives with the command “sudo blkid“ Create a mount point using the command “sudo mkdir / media / USB-Stick“ Enter the stick in the fstab…

  • OPNSense,  Security

    Resolve OPNSense stuck at booting

    I’m busy building an OPNSense firewall for my home network and got stuck at a booting screen (below) before I could start the installation. I tried disabling UEFI, re-enabling it in the BIOS and a few other BIOS settings but could not resolve the issue from within the BIOS. To resolve the issue and get to the installer I followed the forum post by benibilme from here on the OPNSense forums. The steps I followed to resolve the issue are below and the video that shows the steps at the end of this blog post. Reboot your machine if you get stuck at the Booting step when booting from your…

  • News

    Some news and updates

    I’ve been busy with various projects, studying and work and have not had too much time to blog. Having said that, I decided to start 2 podcasts. One for this here website where I will be chatting about technical ops stuff, hardware, electronics and anything related to the operations and sys admins world. The podcast will be streamed live on Twitch and Youtube and then published as a podcast to listen offline. The 2nd podcast will be on my programming website (fromashes) where I will be chatting about current programming projects, what I have learnt, what I have used and anything that might be of interest in the programming side…

  • Exchange Online

    Outlook not connecting to Exchange Online mailboxes

    If you find that some Outlook clients stopped connecting to the Exchange Online mailbox but OWA and ActiveSync is still connecting then check if modern authentication has been disabled for your O365 tenant To check run: Get-OrganizationConfig | Format-Table Name,OAuth* -AutoIf you find it is set to False and all your Outlook clients are 2013 or newer then enable it by running:Set-OrganizationConfig -OAuth2ClientProfileEnabled $trueYour disconnected users should start connecting within a few minutes.

  • Linux,  Uncategorized

    Open Media Vault admin site not working

    I have a NAS running Open Media Vault (OMV) and this week it decided to not display the web front end. When browsing to http://omvIPaddress I received the below error: OMV\Exception: Failed to read file ‘/var/cache/openmediavault/cache.omv\controlpanel\login_js.json’ (size=0). in /usr/share/php/openmediavault/json/file.inc:207 To resolve the issue I connected to the NAS using secure shell: ssh root@ipaddressOfYourNAS and supplied the root passwordAfter authenticating and connecting I ran omv-aptclean and rebooted the server for good measure. I was able to access the web front end again after running omv-aptclean as per above.