René Mayrhofer's blog

Android Security Symposium 2017

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We are happy to co-organize the Android Security Symposium 2017 within the scope of JRC u'smile with University of Applied Science Upper Austria (Campus Hagenberg) and SBA Resarch. The event is again hosted at Technical University Vienna to ease travel for our international speakers and participants. A strong program with a mix of academic and industry speakers has attracted roughly 250 registered participants from all over the world.

How to use certbot for setting up Letsencrypt certificates behind a reverse proxy

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Getting the official "certbot" client for Letsencrypt to run on a host that is not directly reachable via HTTP and/or HTTPS is a bit tricky. One specific example where this makes sense is a virtual machine that compartmentalizes some services such as mail (SMTP, IMAP) or real-time communication (XMPP, MQTT, SIP, etc.) and does intentionally not host the associated HTTP server in the same VM.