Hello,
Your certificate (or certificates) for the names listed below will expire in 19 days (on 06 Nov 16 22:04 +0000). Please make sure to renew your certificate before then, or visitors to your website will encounter errors.
blog.ffnw.de dev.ffnw.de ffnw.de firmware.ffnw.de wiki.ffnw.de www.ffnw.de
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Regards, The Let's Encrypt Team