Since 19 December 2020 7pm CET we see a possible worldwide DDOS amplify attack against Citrix Gateway UDP:443 DTLS EDT services.
11.01.2021: Added information about the new Citrix ADC Gateway (formerly NetScaler) firmware releases, which solve the memory leak issue with -helloVerifiyRequest
24.12.2020: Added information about the official Citrix Knowledge Center article CTX289674
Added a final summary, that repeats all possible solutions
Maked it a lot clearer, that -helloVerifiyRequest doesn’t seem to work well
22.12.2020: Added a warning note, that -helloVerifiyRequest doesn’t work on all Citrix ADC (NetScaler) firmware versions
21.12.2020: Added a third possible solution regarding -helloVerifiyRequest
21.12.2020: Initial version
During the night from Saturday (19.12.2020) to Sunday (20.12.2020) our Zabbix Monitoring informed us, that several Citrix Gateway VPX (50) appliances were at its license cap. We investigated the situation and soon found out, that we had 0 ICA sessions on most of them, hence no explanation for the traffic.
Inspired by Trond Eric Haavarstein’s evergreen PowerShell setup scripts, I created a download and install script for Office 365 Deployment Tool (ODT).
Microsoft Office 365 is the new standard in the EUC space right now. To honor this, we need a fast and reliable way to install it with our favorite deployment tools like MDT or PDQ, for example when you rebuild your master images.
There are a few different ways to deploy Office 365, but they are all similar:
You need the Office 365 Click-to-run setup.exe (Office Deployment Tool (ODT))
You need a XML configuration file
You decide to deploy from a pre-build offline cache or the files are downloaded from Microsoft each and every time
And then you go: setup.exe /configure configuration.xml
Seafile Server is an open source alternative to public cloud storage providers like Dropbox, Microsoft OneDrive, Apple iCloud, Google Drive and Citrix Sharefile. It works on free Linux Distributions like Debian and gives you the freedom to use the comfort of a modern synchronization client, the simplicity of a modern WebGUI, completed with the knowledge where your data is and who can access it.