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Ansible playbook tasks blocked by Unifi threat detection
I noticed that some Ansible playbook tasks sometimes failed – and it looked completely random. After a lot of digging around firewall rules and vlan isolation which I didn’t change – I noticed that in the Unifi threads flow log there were actually a lot of entries of ‘blocked’ threads coming from my Ansible server…
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Let’s Encrypt Certificates can’t renew if Web Station site is restricted
If you have set a custom “Access Control Profile” for a Virtual Host site configured by Synology Web Station (see below picture), where the profile restricts external access to the site, it also results in failing updates for the Let’s Encrypt Certificates. I have found no work-around so far, other than removing the access control…
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Synology Firewall settings for Docker
Some Docker applications require outgoing access to the internet, which is not possible with typical Synology firewall rules. In my case Vaultwarden (lightweight implementation of Bitwarden) needs access to download icons for the various sites with passwords stored, and Watchtower requires access to check and download from docker hub. Simple thing to be done is…
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Synology Let’s Encrypt certificate renewal doesn’t work with VPN connection enabled
Small lesson learned – I got warning e-mails from Let’s Encrypt that some of my certificates I used to access certain services on my Synology NAS were almost expiring. I was mildly surprised as I have all certificates on auto-renewal on my NAS and to my recollection that was working for almost a year already.…
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A Mandelbrot applet
Written a few years ago, an applet which nicely draws a mandelbrot fractal (even with adjustable parameters).You can use the left mouse button to zoom in, and the right to zoom out (click on “read more” to see the applet). The (very simple and immature) code is attached: Mandel.java. You can use in your webpage…
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Hibernate en Standby equivalenten in Nederlandse Vista
In Microsoft Vista zijn verschillende energiebesparingstanden. Je kunt in het Startmenu kiezen voor ‘slaapstand’ en ‘sluimerstand’. De slaapstand komt overeen met een toestand in het Engels stand-by genaamd (ook wel ACPI modus S3). Hierbij gaat de pc in een low-power state (het geheugen blijft stroom krijgen), het voordeel is dat de computer binnen twee seconden…
