Networking, system administration and more
Networking, system administration and more
Networking, system administration and more
I had written a packet capture with tcpdump into a file for future analysis. The interface the capture was taken on had multiple VLAN’s trunked. When I got around to analyzing the file, I found I could read the it with no issues at all using no filter: However, the […]
Read moreOn my Linux desktop, I prefer to use KeePassXC with libsecret integration. After installing Skype and rebooting, I noticed KeePassXC secret service integration broke. One of the dependencies pulled in with Skype is gnome-keyring. When I checked in KeePassXC, the secret service integration page shows that another service is running […]
Read moreThe dnsdist web server and API at the time of writing does not have the ability to use TLS to secure traffic. Recently this was brought up on the dnsdist mailing list in the thread here. The solution mentioned on the mailing list by Stephane Bortzmeyer was using stunnel; personally […]
Read moreI needed to temporary ‘steal’ an interface from a server for other purposes. The problem is the interface was one of two interfaces used in an Open vSwitch bond. I found a couple of ways to remove it, but my goal was to do it with either no service interruption […]
Read moresystemd can provide a service named resolved to handle DNS resolution. This service can handle DNS over TLS, DNSSEC validation, DNS caching, Multicast DNS resolution and more. Depending on the Linux distribution, resolved may be used by default. On these systems there should be a symlink from /etc/resolv.conf to a […]
Read moreAccessing the Java Dell iDRAC 6 virtual console in 2021 is very painful; various Java security enhancements have ensured that the legacy iDRAC console connections will no longer be working. To fix this there is a simple work around – the old encryption algorithms need to be allowed in the […]
Read moreI needed to run some simple tasks from a PowerShell session on a remote Windows computer. I thought this would be no problem – just fire up the PowerShell container that Microsoft provides and start a remote session but of course it is never that easy. I will be using […]
Read moreWhile updating some servers I ran into an issue when updating the available packages. These servers are using the third party repository packages.sury.org to get alternative PHP releases. The error was: Some sources suggested replacing the GPG key in /etc/apt/trusted.gpg.d/php.gpg: [SOLVED] The following signatures were invalid: EXPKEYSIG B188E2B695BD4743 DEB.SURY.ORG Automatic […]
Read moreThese steps allow you to connect to Exchange Online using Powershell inside a Docker container from a Linux host. in my example I am connecting to Exchange Online from Ubuntu 21.04. For the Docker container image I am using the official Azure Powershell container from Microsoft (mcr.microsoft.com/azure-powershell). The account I […]
Read moreChoosing a specific cipher to use for SSH can have a large performance impact when transferring files using tools that use SSH as a transport. For testing, I decided to benchmark the impact of using scp with various ciphers locally on my laptop as well as a VPS from Linode. […]
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