February 23-25, 2022
Montreal, Canada

Debugging TLS and certificate problems

In September 2021 the old root CA of Let’s Encrypt expired, which caused connection issues all over the world. In my talk you will learn how to debug, understand, and avoid problems with TLS connections and certificates. I will introduce you to various techniques and tools like scanners, packet analyzer, and command line tools for investigating problems.

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Christian Heimes

Red Hat

Christian is a long time Python developer from Hamburg/Germany. In the past he has contributed to several Open Source projects such as the CPython interpreter. In the past years he has helped to keep Python secure, for example as member of the Python security response team, secure hashing (PEP 456) and improvements of Python's TLS/SSL module. Nowadays he is employed by Red Hat and works on OpenShift container security, FreeIPA identity management and Dogtag public key infrastructure.

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