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UniFi Smart Queue Fix for slow loading pages (MTU problem)

Disclaimer: Parts of this guide and the technical analysis within were developed in collaboration with Gemini (AI)This guide involves advanced modifications via SSH and the modification of system services. While these steps are safe when followed correctly, they can impact your network’s stability if misconfigured. Proceed with caution, ensure you have a recent backup of your UniFi configuration, and only apply these changes if you are comfortable using the Linux […]

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Auerswald Compact 4000 PBX broken after Firmware Update

Today a PBX from Auerswald got broken after the latest Update, 8.4B – Build 000. After the failed Update the PBX stuck with a red blinking status LED and no LAN connection. Solution Remove the cover Press the “Reset” button Press and hold the “Altern.” button until the status LED switch from fast flashing orange to slow flashing orange Release the “Altern.” button Check the network connection and reinstall the

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shrink XFS partition

Below you find a description how to reduce a XFS partition. Important: This contains a full backup and restore of all data because XFS does not support shrinking. Environment Arch Linux (Kernel 5.15.82-1-lts) XFS partition on LVM (vg_root/lv_home) Workflow Boot Arch Linux from an USB drive Mount an USB disk for the backup datamount /dev/sdc1 /mnt/usb Store the UUIDblkid /dev/mapper/vg_root-lv_root > /mnt/usb/uuid Install xfsdumppacman -Sy xfsdump Mount the LVmkdir /mnt/vg_root-lv_homemount

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Arch Linux and Veeam Agent: “Failed to collect hostname”

Today I integrated Arch Linux into the Veeam Backup Suite and faced the following error: [04.05.2022 14:38:45.324] <140123638592000> install| >> |Failed to collect hostname [04.05.2022 14:38:45.324] <140123638592000> install| >> |–tr:in std::__cxx11::string CLinuxEpSystemInfoCollector::CollectHostName() const at /mnt/Sources/VeeamInstallerLib/veeaminstallerlib/LinuxEpSystemInfoCollector.cpp:108 Environment Arch Linux (with Kernel 5.16.16, important for veeamsnap) Veeam Agent for Linux 5.0.2.4567-1 Veeam Backup and Replication 11.0.1.1261 Solution It took a long time to figure out the problem but the solution is very

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Migrate UniFi Controller from Docker to Dream Machine

Below you find a description how to migrate from a UniFi Controller, running inside Docker, to a UniFi Dream Machine. Environment UniFi Controller 6.5.55 Ubiquiti Dream Machine (UDM) Workflow Install the UDM with default settings Update the UDM and UniFi Controller to the latest version. The UniFi Controller should have the same version as the old controller. Backup the settings from the old Controller Unplug WAN and LAN from your

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Move a UniFi Controller to a new host

Environment UniFi Controller 6.5.55 inside a Docker container Source-Host: 192.168.20.11 Destination-Host: 192.168.20.32 Workflow Stop the Docker container on Source-Host Copy the files to the Destination-Host Start the container on the Source-Host Start the container on the Destination-Host Verify that all devices on the Source-Host are online Verify the devices on the Destination-Host, they should be offline Open the Controller on the Source-Host and change the Controller IP to the Destination-Host.

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Mailcow change Dovecot mail directory layout

Here you find a solution to change the default behavior of Dovecot to store folders in a different way to reduce problems when clients use Microsoft Outlook. Yes there are still people out there who use Outlook instead of Thunderbird or the Webinterface … but that’s another story. Before Folder Folder.Subfolder Folder.Subfolder.Subfolder After Folder Subfolder Subfolder Problem With older versions of Outlook you have the problem with folders which contain

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