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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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Use of <s:selectItems> in JBoss Seam
In JSF (JavaServer Faces), the use of a SelectList or SelectMenu is combined with the use of a List<SelectItem> in a backing bean. Most of the times you already have a list wih the items to choose from, and have to rewrite that list to selectItems. And then add a way in your backing bean…
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XP erfenis in Office 2007
Als je in Office 2007 gebruik maakt van de ribbon (of, in goed Nederlands: Lint ) en je wilt alle opties zien, kun je rechtsonder op een knopje drukken, zoals te zien in dit plaatje: Dan zie je ook gelijk dat het voorbeeld van het dialoogvenster in XP stijl is. Erg jammer, zeker als je…
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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…
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Rare spellingsverbeteringen in Word 2007
Wel grappig om te zien dat Word 2007 met de Engelse spellingscontrole ziet dat “wich” niet klopt: Nu geeft Word als eerste verbetering witch, welke dan ook weer niet goed is: En nu kan ik het eindelijk verbeteren naar which, wat ik natuurlijk bedoelde J.
