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. reporting. This standard is quite new (2018) and is particularly suitable for servers without DANE4. However, even without DANE I believe that I have the best and most complete server by standards (DKIM, SPF, DMARC, MTA-SRA, TLS-RPT, TLS1. Read more

October 8, 2020 | 10:02

BSI warns about Exchange

40.000 Companies in Germany affected The BSI (German Federal Authority for Informationsecurity) warns with the second highest level “orange” (= the IT threat situation is mission critical. massive disruption of regular operations) in the public media1. Around 40,000 companies in Germany alone are affected by several critical vulnerabilities because security updates have not yet been installed2. In fact, Heise speaks of playing Russian roulette3. It’s not without reason that I have been warning for several years now about interlocking internal AD and internet functions like Microsoft does deliberatly. Read more

October 7, 2020 | 10:00

Another Exchange Migration to Linux

One more SME customer (approx. 250 users spread over several nationwide locations) is migrating away from Exchange to free and Open Source solution. With the ready-to-use installation of a new Linux mail server I have provided my very modest contribution. The rest of the user and the data transfer will be done by the customer’s own IT department. Users can continue to work in their familiar Outlook and mobile client environment when the new EAS accounts are rolled out “side-by-side” to the existing onces. Read more

September 14, 2020 | 17:20

Exchange Replacement

I really just wanted to show you this Fnord, which is a very Microsoft-like thing: Well however, you might ask why I am tackling with Outlook 2019, let me please explain. A company with 40 mailboxes has decided to abandon its Exchange server. The following sentence is for all accountants and auditors: We are talking about cost-savings of 15-25% per year! Now everything runs with common internet standards on a Debian 10 with all the comfort and convenience as before: Starting with EAS-ActiveSync for Outlook (sigh if it has to be), a great webmailer, public folders, calendars, contacts and even resources. Read more

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