October 25, 2020 | 12:22

Whitebox-Monitoring with Prometheus

Winter is coming! Winter time has already arrived, and soon the Corona Lockdown aswell. Sitting at home in the warmth with a cup of tea, having a complete overview of the IT is a good feeling. The catchword here is “complete”. I don’t rely on traditional blackbox monitoring solutions1 but rather on the whitebox solution called Prometheus2. Read more

October 19, 2020 | 08:00

RFC 8461 MTA-STA

This weekend I was very active in improving my own security. I have also found two neat tools for quality testing which are Hardenize1 and DNSViz2 - both added to my Micro-Blog post “Measuring website quality”. On my own mailserver I have implemented MTA-STA according to RFC 84613 incl. Read more

October 18, 2020 | 12:20

Conditional Logging with Apache

I’ve started using Apache-Exporter1 for monitoring and checking this weekend how useful it is and how it can be integrated into my Prometheus2 monitoring enviroment. The server-status requests inevitably lead to more “background noise” in the Apache logfiles. The screenshot below clearly shows in the upper less section: Read more

September 23, 2020 | 12:40

Regarding Mailservers

Today I’ve recieved a Email with following Headers: Arc-Authentication-Results: i=1; mx.microsoft.com 1; spf=none; dmarc=none; dkim=none; arc=none Erhalten: from xxxxxxxx.protection.outlook.com May I ask openly what this “protection” outlook.com server does in the absence of common spam and security features? There are numerous tools in the web for (self-)checking. Read more

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