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shibumi.dev
| | blog.freeradical.zone
2.1 parsecs away

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| | I'm serving Free Radical's images etc. from S3. When I updated to Mastodon v2.1.0, I noticed that all the page's images were missing. Safari's Show JavaScript Console menu revealed a lot of errors like: [Error] Refused to load https://s3-us-west-2.amazonaws.com/freeradical-system/accounts/avatars/000/014/309/static/91f9782fad3f6284.png because it does not appear in the img-src directive of the Content Security Policy. Turns out that some time between the releases of v2.0.0 and v2.1.0, the Mastodon switch...
| | www.electricmonk.nl
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| | Ferry Boender's blog
| | grayduck.mn
2.1 parsecs away

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| | SVG can fail strangely, with CSP
| | blog.ja-ke.tech
10.1 parsecs away

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| This post shall describe how to obtain a free wildcard TLS cert for your domain from Let's Encrypt with the recommended certbot python based utility. Of course there are few other clients that already support the ACME v2 protocol, which is required for wildcards, i will only show certbot command here, but the procedure with other clients should be pretty similar.