Send email secure (or not)

Send email secure (or not)

Email is send with the Simple Mail Transfer Protocol ( SMTP ). It was invented back in the day (1982) when the Internet was run by people with the best intentions and de security was not needed or perceived not necessary. When you are sending an email the text, headers, email addresses, etc. are send over …

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P1 monitor

P1 monitor

P1 monitor is op de Raspberry PI 3 gebaseerde software om je “slimme” meter uit te lezen. De slimme meter heeft een zogenaamde P1 poort/aansluiting waar elke 10 seconden de laatste waarden uit te lezen zijn. Als je huidige en historisch elektriciteit verbruik wil meten dan is P1 monitor de oplossing voor je. Hieronder een …

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Certificate Authority Authorization (CAA) cometh

Certificate Authority Authorization (CAA) cometh

DNS Certification Authority Authorization (CAA) Resource Record are defined in RFC6844 since January 2013. The goal of the CAA record is to give the ability to a CA to check if the CA may issue a CA certificate. Abstract from RFC6844 The Certification Authority Authorization (CAA) DNS Resource Record allows a DNS domain name holder …

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Python Internet availability

Python Internet availability

When you need to check if your Python app can reach the Internet.  You can always check if an Internet website is responding with urllib.request.urlretrieve. For instance, www. Google.com.  I have found this is not always reliable. A more reliable method is pinging one or more public DNS servers.  This snippet is a Python 3 …

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